/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:36:43,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:36:43,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:36:43,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:36:43,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:36:43,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:36:43,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:36:43,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:36:43,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:36:43,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:36:43,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:36:43,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:36:43,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:36:43,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:36:43,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:36:43,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:36:43,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:36:43,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:36:43,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:36:43,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:36:43,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:36:43,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:36:43,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:36:43,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:36:43,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:36:43,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:36:43,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:36:43,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:36:43,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:36:43,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:36:43,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:36:43,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:36:43,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:36:43,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:36:43,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:36:43,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:36:43,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:36:43,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:36:43,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:36:43,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:36:43,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:36:43,546 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 [2023-03-31 23:36:43,575 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:36:43,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:36:43,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:36:43,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:36:43,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:36:43,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:36:43,576 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:36:43,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:36:43,577 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:36:43,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:36:43,577 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:36:43,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:36:43,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:36:43,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:36:43,578 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:36:43,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:36:43,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:36:43,578 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:36:43,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:36:43,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:36:43,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:36:43,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:36:43,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:36:43,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:36:43,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:36:43,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:36:43,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:36:43,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:36:43,833 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:36:43,834 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:36:43,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-03-31 23:36:44,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:36:45,287 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:36:45,287 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-03-31 23:36:45,312 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1e354da/98c729619966460b835ed3cfdb11afa4/FLAG454ff1b60 [2023-03-31 23:36:45,328 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1e354da/98c729619966460b835ed3cfdb11afa4 [2023-03-31 23:36:45,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:36:45,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:36:45,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:36:45,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:36:45,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:36:45,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:36:45" (1/1) ... [2023-03-31 23:36:45,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc11fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:45, skipping insertion in model container [2023-03-31 23:36:45,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:36:45" (1/1) ... [2023-03-31 23:36:45,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:36:45,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:36:45,780 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_product25.cil.c[23488,23501] [2023-03-31 23:36:45,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:36:45,909 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:36:45,965 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_product25.cil.c[23488,23501] [2023-03-31 23:36:46,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:36:46,069 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:36:46,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46 WrapperNode [2023-03-31 23:36:46,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:36:46,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:36:46,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:36:46,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:36:46,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,188 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:36:46,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:36:46,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:36:46,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:36:46,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (1/1) ... [2023-03-31 23:36:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:36:46,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:46,254 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) [2023-03-31 23:36:46,255 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 [2023-03-31 23:36:46,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:36:46,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:36:46,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:36:46,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:36:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-03-31 23:36:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-03-31 23:36:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-03-31 23:36:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-03-31 23:36:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:36:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:36:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:36:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:36:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:36:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:36:46,291 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:36:46,291 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:36:46,291 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:36:46,291 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:36:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:36:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:36:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:36:46,494 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:36:46,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:36:47,665 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:36:48,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:36:48,446 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:36:48,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:36:48 BoogieIcfgContainer [2023-03-31 23:36:48,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:36:48,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:36:48,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:36:48,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:36:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:36:45" (1/3) ... [2023-03-31 23:36:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf595d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:36:48, skipping insertion in model container [2023-03-31 23:36:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:36:46" (2/3) ... [2023-03-31 23:36:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf595d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:36:48, skipping insertion in model container [2023-03-31 23:36:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:36:48" (3/3) ... [2023-03-31 23:36:48,458 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2023-03-31 23:36:48,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:36:48,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:36:48,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:36:48,527 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;@283c857b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:36:48,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:36:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 540 states, 314 states have (on average 1.4968152866242037) internal successors, (470), 341 states have internal predecessors, (470), 164 states have call successors, (164), 49 states have call predecessors, (164), 49 states have return successors, (164), 155 states have call predecessors, (164), 164 states have call successors, (164) [2023-03-31 23:36:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 23:36:48,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:48,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:48,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:48,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 726926531, now seen corresponding path program 1 times [2023-03-31 23:36:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35185772] [2023-03-31 23:36:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:49,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35185772] [2023-03-31 23:36:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35185772] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:49,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:49,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:36:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212253160] [2023-03-31 23:36:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:36:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:36:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:36:49,408 INFO L87 Difference]: Start difference. First operand has 540 states, 314 states have (on average 1.4968152866242037) internal successors, (470), 341 states have internal predecessors, (470), 164 states have call successors, (164), 49 states have call predecessors, (164), 49 states have return successors, (164), 155 states have call predecessors, (164), 164 states have call successors, (164) Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-03-31 23:36:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:49,762 INFO L93 Difference]: Finished difference Result 832 states and 1275 transitions. [2023-03-31 23:36:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:36:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 92 [2023-03-31 23:36:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:49,779 INFO L225 Difference]: With dead ends: 832 [2023-03-31 23:36:49,779 INFO L226 Difference]: Without dead ends: 448 [2023-03-31 23:36:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:36:49,788 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 34 mSDsluCounter, 3562 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4160 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:49,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4160 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:36:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-03-31 23:36:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 413. [2023-03-31 23:36:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 280 states have internal predecessors, (401), 109 states have call successors, (109), 45 states have call predecessors, (109), 42 states have return successors, (102), 99 states have call predecessors, (102), 101 states have call successors, (102) [2023-03-31 23:36:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 612 transitions. [2023-03-31 23:36:49,855 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 612 transitions. Word has length 92 [2023-03-31 23:36:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:49,856 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 612 transitions. [2023-03-31 23:36:49,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-03-31 23:36:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 612 transitions. [2023-03-31 23:36:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 23:36:49,861 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:49,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:49,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:36:49,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:49,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash -856331579, now seen corresponding path program 1 times [2023-03-31 23:36:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:49,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762883085] [2023-03-31 23:36:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:50,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762883085] [2023-03-31 23:36:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762883085] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:50,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:36:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865150890] [2023-03-31 23:36:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:36:50,421 INFO L87 Difference]: Start difference. First operand 413 states and 612 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-03-31 23:36:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:52,829 INFO L93 Difference]: Finished difference Result 1270 states and 1945 transitions. [2023-03-31 23:36:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:36:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2023-03-31 23:36:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:52,836 INFO L225 Difference]: With dead ends: 1270 [2023-03-31 23:36:52,836 INFO L226 Difference]: Without dead ends: 899 [2023-03-31 23:36:52,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:36:52,839 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1674 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:52,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 606 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3206 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:36:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-03-31 23:36:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 872. [2023-03-31 23:36:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 580 states have (on average 1.5775862068965518) internal successors, (915), 615 states have internal predecessors, (915), 212 states have call successors, (212), 78 states have call predecessors, (212), 79 states have return successors, (212), 202 states have call predecessors, (212), 204 states have call successors, (212) [2023-03-31 23:36:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1339 transitions. [2023-03-31 23:36:52,937 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1339 transitions. Word has length 97 [2023-03-31 23:36:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1339 transitions. [2023-03-31 23:36:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-03-31 23:36:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1339 transitions. [2023-03-31 23:36:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-03-31 23:36:52,942 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:52,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:52,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:36:52,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:52,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash 364978824, now seen corresponding path program 1 times [2023-03-31 23:36:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:52,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667180853] [2023-03-31 23:36:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:52,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:53,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667180853] [2023-03-31 23:36:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667180853] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:53,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:36:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595951867] [2023-03-31 23:36:53,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:36:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:36:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:36:53,202 INFO L87 Difference]: Start difference. First operand 872 states and 1339 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-03-31 23:36:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:53,358 INFO L93 Difference]: Finished difference Result 1380 states and 2133 transitions. [2023-03-31 23:36:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:36:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 101 [2023-03-31 23:36:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:53,366 INFO L225 Difference]: With dead ends: 1380 [2023-03-31 23:36:53,366 INFO L226 Difference]: Without dead ends: 894 [2023-03-31 23:36:53,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:36:53,373 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 7 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:53,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2260 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-03-31 23:36:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 884. [2023-03-31 23:36:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 589 states have (on average 1.5687606112054329) internal successors, (924), 624 states have internal predecessors, (924), 212 states have call successors, (212), 78 states have call predecessors, (212), 82 states have return successors, (218), 205 states have call predecessors, (218), 204 states have call successors, (218) [2023-03-31 23:36:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1354 transitions. [2023-03-31 23:36:53,436 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1354 transitions. Word has length 101 [2023-03-31 23:36:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:53,437 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1354 transitions. [2023-03-31 23:36:53,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-03-31 23:36:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1354 transitions. [2023-03-31 23:36:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-31 23:36:53,441 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:53,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:36:53,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:53,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1555145312, now seen corresponding path program 1 times [2023-03-31 23:36:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438359366] [2023-03-31 23:36:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:53,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:53,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438359366] [2023-03-31 23:36:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438359366] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:53,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:36:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592610531] [2023-03-31 23:36:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:36:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:36:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:36:53,973 INFO L87 Difference]: Start difference. First operand 884 states and 1354 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-03-31 23:36:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:56,437 INFO L93 Difference]: Finished difference Result 1873 states and 2875 transitions. [2023-03-31 23:36:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:36:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 105 [2023-03-31 23:36:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:56,449 INFO L225 Difference]: With dead ends: 1873 [2023-03-31 23:36:56,449 INFO L226 Difference]: Without dead ends: 1279 [2023-03-31 23:36:56,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:36:56,452 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2268 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:56,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2430 Valid, 403 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:36:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-03-31 23:36:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1229. [2023-03-31 23:36:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 803 states have (on average 1.518057285180573) internal successors, (1219), 855 states have internal predecessors, (1219), 302 states have call successors, (302), 115 states have call predecessors, (302), 123 states have return successors, (318), 294 states have call predecessors, (318), 294 states have call successors, (318) [2023-03-31 23:36:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1839 transitions. [2023-03-31 23:36:56,525 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1839 transitions. Word has length 105 [2023-03-31 23:36:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:56,526 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1839 transitions. [2023-03-31 23:36:56,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-03-31 23:36:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1839 transitions. [2023-03-31 23:36:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 23:36:56,528 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:56,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:36:56,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:56,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1013803254, now seen corresponding path program 1 times [2023-03-31 23:36:56,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:56,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129045156] [2023-03-31 23:36:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:56,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129045156] [2023-03-31 23:36:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129045156] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:56,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:56,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:36:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967886017] [2023-03-31 23:36:56,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:36:56,804 INFO L87 Difference]: Start difference. First operand 1229 states and 1839 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:36:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:57,125 INFO L93 Difference]: Finished difference Result 2312 states and 3548 transitions. [2023-03-31 23:36:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 108 [2023-03-31 23:36:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:57,134 INFO L225 Difference]: With dead ends: 2312 [2023-03-31 23:36:57,134 INFO L226 Difference]: Without dead ends: 1229 [2023-03-31 23:36:57,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:36:57,142 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 211 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:57,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3332 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:36:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-03-31 23:36:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1229. [2023-03-31 23:36:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 803 states have (on average 1.4782067247820672) internal successors, (1187), 855 states have internal predecessors, (1187), 302 states have call successors, (302), 115 states have call predecessors, (302), 123 states have return successors, (318), 294 states have call predecessors, (318), 294 states have call successors, (318) [2023-03-31 23:36:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1807 transitions. [2023-03-31 23:36:57,215 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1807 transitions. Word has length 108 [2023-03-31 23:36:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:57,216 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1807 transitions. [2023-03-31 23:36:57,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:36:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1807 transitions. [2023-03-31 23:36:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 23:36:57,218 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:57,218 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:36:57,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:57,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2097252871, now seen corresponding path program 1 times [2023-03-31 23:36:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:57,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754662114] [2023-03-31 23:36:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:36:57,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754662114] [2023-03-31 23:36:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754662114] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:57,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:36:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:36:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66914591] [2023-03-31 23:36:57,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:36:57,657 INFO L87 Difference]: Start difference. First operand 1229 states and 1807 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:36:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:59,609 INFO L93 Difference]: Finished difference Result 2181 states and 3218 transitions. [2023-03-31 23:36:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:36:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 110 [2023-03-31 23:36:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:59,617 INFO L225 Difference]: With dead ends: 2181 [2023-03-31 23:36:59,618 INFO L226 Difference]: Without dead ends: 1299 [2023-03-31 23:36:59,621 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 [2023-03-31 23:36:59,622 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 965 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 499 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 23:36:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2023-03-31 23:36:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1256. [2023-03-31 23:36:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 821 states have (on average 1.4725943970767357) internal successors, (1209), 877 states have internal predecessors, (1209), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-03-31 23:36:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1841 transitions. [2023-03-31 23:36:59,718 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1841 transitions. Word has length 110 [2023-03-31 23:36:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:59,719 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1841 transitions. [2023-03-31 23:36:59,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:36:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1841 transitions. [2023-03-31 23:36:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-03-31 23:36:59,725 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:59,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:36:59,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:59,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash -702705924, now seen corresponding path program 1 times [2023-03-31 23:36:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:59,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559707733] [2023-03-31 23:36:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:59,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:37:00,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:00,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559707733] [2023-03-31 23:37:00,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559707733] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:00,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:37:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257757334] [2023-03-31 23:37:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:00,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:37:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:37:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:37:00,014 INFO L87 Difference]: Start difference. First operand 1256 states and 1841 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2023-03-31 23:37:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:00,579 INFO L93 Difference]: Finished difference Result 1296 states and 1898 transitions. [2023-03-31 23:37:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:37:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 [2023-03-31 23:37:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:00,587 INFO L225 Difference]: With dead ends: 1296 [2023-03-31 23:37:00,588 INFO L226 Difference]: Without dead ends: 1279 [2023-03-31 23:37:00,589 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 [2023-03-31 23:37:00,589 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 615 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:00,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1810 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:37:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-03-31 23:37:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1260. [2023-03-31 23:37:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 825 states have (on average 1.4703030303030302) internal successors, (1213), 881 states have internal predecessors, (1213), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-03-31 23:37:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1845 transitions. [2023-03-31 23:37:00,662 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1845 transitions. Word has length 117 [2023-03-31 23:37:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:00,663 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1845 transitions. [2023-03-31 23:37:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2023-03-31 23:37:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1845 transitions. [2023-03-31 23:37:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 23:37:00,665 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:00,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 23:37:00,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:00,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 301697557, now seen corresponding path program 1 times [2023-03-31 23:37:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:00,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105959668] [2023-03-31 23:37:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:37:00,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:00,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105959668] [2023-03-31 23:37:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105959668] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:00,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:00,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:37:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607043604] [2023-03-31 23:37:00,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:37:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:37:00,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:37:00,987 INFO L87 Difference]: Start difference. First operand 1260 states and 1845 transitions. Second operand has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-03-31 23:37:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:01,203 INFO L93 Difference]: Finished difference Result 1281 states and 1871 transitions. [2023-03-31 23:37:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:37:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 119 [2023-03-31 23:37:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:01,210 INFO L225 Difference]: With dead ends: 1281 [2023-03-31 23:37:01,210 INFO L226 Difference]: Without dead ends: 1264 [2023-03-31 23:37:01,211 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 [2023-03-31 23:37:01,212 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 10 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:01,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3894 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-03-31 23:37:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1260. [2023-03-31 23:37:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 825 states have (on average 1.4666666666666666) internal successors, (1210), 881 states have internal predecessors, (1210), 303 states have call successors, (303), 120 states have call predecessors, (303), 131 states have return successors, (329), 294 states have call predecessors, (329), 295 states have call successors, (329) [2023-03-31 23:37:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1842 transitions. [2023-03-31 23:37:01,291 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1842 transitions. Word has length 119 [2023-03-31 23:37:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:01,291 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1842 transitions. [2023-03-31 23:37:01,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-03-31 23:37:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1842 transitions. [2023-03-31 23:37:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-31 23:37:01,294 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:01,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:37:01,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:01,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1978714007, now seen corresponding path program 1 times [2023-03-31 23:37:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:01,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404308291] [2023-03-31 23:37:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:37:01,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404308291] [2023-03-31 23:37:01,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404308291] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:01,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:37:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106997971] [2023-03-31 23:37:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:37:01,418 INFO L87 Difference]: Start difference. First operand 1260 states and 1842 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) [2023-03-31 23:37:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:01,646 INFO L93 Difference]: Finished difference Result 3636 states and 5400 transitions. [2023-03-31 23:37:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:01,647 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 137 [2023-03-31 23:37:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:01,661 INFO L225 Difference]: With dead ends: 3636 [2023-03-31 23:37:01,661 INFO L226 Difference]: Without dead ends: 2418 [2023-03-31 23:37:01,667 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 [2023-03-31 23:37:01,669 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 545 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:01,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1138 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2023-03-31 23:37:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2371. [2023-03-31 23:37:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 1589 states have (on average 1.4801762114537445) internal successors, (2352), 1697 states have internal predecessors, (2352), 541 states have call successors, (541), 213 states have call predecessors, (541), 240 states have return successors, (622), 514 states have call predecessors, (622), 532 states have call successors, (622) [2023-03-31 23:37:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 3515 transitions. [2023-03-31 23:37:01,811 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 3515 transitions. Word has length 137 [2023-03-31 23:37:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 3515 transitions. [2023-03-31 23:37:01,814 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) [2023-03-31 23:37:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 3515 transitions. [2023-03-31 23:37:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 23:37:01,816 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:01,816 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:01,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:37:01,817 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:01,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:01,817 INFO L85 PathProgramCache]: Analyzing trace with hash -336444353, now seen corresponding path program 1 times [2023-03-31 23:37:01,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:01,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480805341] [2023-03-31 23:37:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:01,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:37:01,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:01,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480805341] [2023-03-31 23:37:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480805341] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:01,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:01,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:37:01,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383433055] [2023-03-31 23:37:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:37:01,941 INFO L87 Difference]: Start difference. First operand 2371 states and 3515 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:37:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:02,300 INFO L93 Difference]: Finished difference Result 6968 states and 10486 transitions. [2023-03-31 23:37:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 135 [2023-03-31 23:37:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:02,331 INFO L225 Difference]: With dead ends: 6968 [2023-03-31 23:37:02,332 INFO L226 Difference]: Without dead ends: 4642 [2023-03-31 23:37:02,346 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 [2023-03-31 23:37:02,347 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 544 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:02,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1144 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2023-03-31 23:37:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 4594. [2023-03-31 23:37:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 3118 states have (on average 1.486529826812059) internal successors, (4635), 3330 states have internal predecessors, (4635), 1017 states have call successors, (1017), 399 states have call predecessors, (1017), 458 states have return successors, (1248), 954 states have call predecessors, (1248), 1006 states have call successors, (1248) [2023-03-31 23:37:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 6900 transitions. [2023-03-31 23:37:02,695 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 6900 transitions. Word has length 135 [2023-03-31 23:37:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:02,695 INFO L495 AbstractCegarLoop]: Abstraction has 4594 states and 6900 transitions. [2023-03-31 23:37:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:37:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 6900 transitions. [2023-03-31 23:37:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 23:37:02,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:02,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:02,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 23:37:02,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:02,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1841110147, now seen corresponding path program 1 times [2023-03-31 23:37:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17397] [2023-03-31 23:37:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:37:02,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:02,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17397] [2023-03-31 23:37:02,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17397] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:02,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:37:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982484092] [2023-03-31 23:37:02,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:37:02,815 INFO L87 Difference]: Start difference. First operand 4594 states and 6900 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:37:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:03,398 INFO L93 Difference]: Finished difference Result 13633 states and 20858 transitions. [2023-03-31 23:37:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 136 [2023-03-31 23:37:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:03,465 INFO L225 Difference]: With dead ends: 13633 [2023-03-31 23:37:03,465 INFO L226 Difference]: Without dead ends: 9090 [2023-03-31 23:37:03,488 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 [2023-03-31 23:37:03,489 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 543 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:03,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1150 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2023-03-31 23:37:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 9041. [2023-03-31 23:37:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9041 states, 6177 states have (on average 1.4889104743402946) internal successors, (9197), 6597 states have internal predecessors, (9197), 1969 states have call successors, (1969), 771 states have call predecessors, (1969), 894 states have return successors, (2638), 1834 states have call predecessors, (2638), 1954 states have call successors, (2638) [2023-03-31 23:37:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9041 states to 9041 states and 13804 transitions. [2023-03-31 23:37:04,141 INFO L78 Accepts]: Start accepts. Automaton has 9041 states and 13804 transitions. Word has length 136 [2023-03-31 23:37:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:04,143 INFO L495 AbstractCegarLoop]: Abstraction has 9041 states and 13804 transitions. [2023-03-31 23:37:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:37:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9041 states and 13804 transitions. [2023-03-31 23:37:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 23:37:04,146 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:04,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 23:37:04,147 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:04,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1821812251, now seen corresponding path program 1 times [2023-03-31 23:37:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:04,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286412962] [2023-03-31 23:37:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:37:04,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:04,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286412962] [2023-03-31 23:37:04,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286412962] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:04,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:04,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:37:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384578290] [2023-03-31 23:37:04,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:04,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:37:04,308 INFO L87 Difference]: Start difference. First operand 9041 states and 13804 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-03-31 23:37:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:05,369 INFO L93 Difference]: Finished difference Result 26964 states and 42295 transitions. [2023-03-31 23:37:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 [2023-03-31 23:37:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:05,488 INFO L225 Difference]: With dead ends: 26964 [2023-03-31 23:37:05,489 INFO L226 Difference]: Without dead ends: 17986 [2023-03-31 23:37:05,535 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 [2023-03-31 23:37:05,536 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 542 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:05,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1156 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17986 states. [2023-03-31 23:37:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17986 to 17936. [2023-03-31 23:37:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17936 states, 12296 states have (on average 1.4891834743005856) internal successors, (18311), 13132 states have internal predecessors, (18311), 3873 states have call successors, (3873), 1515 states have call predecessors, (3873), 1766 states have return successors, (5904), 3594 states have call predecessors, (5904), 3850 states have call successors, (5904) [2023-03-31 23:37:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17936 states to 17936 states and 28088 transitions. [2023-03-31 23:37:06,839 INFO L78 Accepts]: Start accepts. Automaton has 17936 states and 28088 transitions. Word has length 140 [2023-03-31 23:37:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:06,839 INFO L495 AbstractCegarLoop]: Abstraction has 17936 states and 28088 transitions. [2023-03-31 23:37:06,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-03-31 23:37:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 17936 states and 28088 transitions. [2023-03-31 23:37:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-03-31 23:37:06,842 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:06,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 23:37:06,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:06,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -642866917, now seen corresponding path program 1 times [2023-03-31 23:37:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698520677] [2023-03-31 23:37:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:37:06,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698520677] [2023-03-31 23:37:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698520677] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:06,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:37:06,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:37:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457072325] [2023-03-31 23:37:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:06,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:37:06,970 INFO L87 Difference]: Start difference. First operand 17936 states and 28088 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-03-31 23:37:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:08,288 INFO L93 Difference]: Finished difference Result 19099 states and 30079 transitions. [2023-03-31 23:37:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 [2023-03-31 23:37:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:08,380 INFO L225 Difference]: With dead ends: 19099 [2023-03-31 23:37:08,381 INFO L226 Difference]: Without dead ends: 19086 [2023-03-31 23:37:08,392 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 [2023-03-31 23:37:08,393 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 528 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:08,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1154 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19086 states. [2023-03-31 23:37:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19086 to 19037. [2023-03-31 23:37:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19037 states, 13053 states have (on average 1.4886233049873592) internal successors, (19431), 13941 states have internal predecessors, (19431), 4110 states have call successors, (4110), 1607 states have call predecessors, (4110), 1873 states have return successors, (6450), 3812 states have call predecessors, (6450), 4087 states have call successors, (6450) [2023-03-31 23:37:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19037 states to 19037 states and 29991 transitions. [2023-03-31 23:37:09,675 INFO L78 Accepts]: Start accepts. Automaton has 19037 states and 29991 transitions. Word has length 141 [2023-03-31 23:37:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:09,675 INFO L495 AbstractCegarLoop]: Abstraction has 19037 states and 29991 transitions. [2023-03-31 23:37:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-03-31 23:37:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19037 states and 29991 transitions. [2023-03-31 23:37:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-03-31 23:37:09,684 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:09,684 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:09,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 23:37:09,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:09,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash -586627307, now seen corresponding path program 1 times [2023-03-31 23:37:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:09,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395948885] [2023-03-31 23:37:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-03-31 23:37:10,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395948885] [2023-03-31 23:37:10,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395948885] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749217688] [2023-03-31 23:37:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:10,095 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) [2023-03-31 23:37:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:37:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:10,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 3924 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:37:10,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2023-03-31 23:37:10,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749217688] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:10,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-31 23:37:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635808923] [2023-03-31 23:37:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:37:10,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:37:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:37:10,898 INFO L87 Difference]: Start difference. First operand 19037 states and 29991 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-03-31 23:37:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:12,124 INFO L93 Difference]: Finished difference Result 38206 states and 60802 transitions. [2023-03-31 23:37:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:37:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) Word has length 303 [2023-03-31 23:37:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:12,239 INFO L225 Difference]: With dead ends: 38206 [2023-03-31 23:37:12,239 INFO L226 Difference]: Without dead ends: 19232 [2023-03-31 23:37:12,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:37:12,327 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 8 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:12,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1109 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:37:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19232 states. [2023-03-31 23:37:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19232 to 19232. [2023-03-31 23:37:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19232 states, 13209 states have (on average 1.4848966613672496) internal successors, (19614), 14145 states have internal predecessors, (19614), 4110 states have call successors, (4110), 1607 states have call predecessors, (4110), 1912 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-03-31 23:37:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19232 states to 19232 states and 29626 transitions. [2023-03-31 23:37:13,917 INFO L78 Accepts]: Start accepts. Automaton has 19232 states and 29626 transitions. Word has length 303 [2023-03-31 23:37:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:13,917 INFO L495 AbstractCegarLoop]: Abstraction has 19232 states and 29626 transitions. [2023-03-31 23:37:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2023-03-31 23:37:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 19232 states and 29626 transitions. [2023-03-31 23:37:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-03-31 23:37:13,925 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:13,925 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:13,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:14,138 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,SelfDestructingSolverStorable13 [2023-03-31 23:37:14,138 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:14,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash 927929081, now seen corresponding path program 1 times [2023-03-31 23:37:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:14,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789093418] [2023-03-31 23:37:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-03-31 23:37:14,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789093418] [2023-03-31 23:37:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789093418] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056194885] [2023-03-31 23:37:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:14,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:14,581 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) [2023-03-31 23:37:14,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:37:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:15,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 3911 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:37:15,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-03-31 23:37:15,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056194885] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:37:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564606793] [2023-03-31 23:37:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:37:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:37:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:37:15,335 INFO L87 Difference]: Start difference. First operand 19232 states and 29626 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-03-31 23:37:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:16,382 INFO L93 Difference]: Finished difference Result 40410 states and 63810 transitions. [2023-03-31 23:37:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:37:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 296 [2023-03-31 23:37:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:16,495 INFO L225 Difference]: With dead ends: 40410 [2023-03-31 23:37:16,495 INFO L226 Difference]: Without dead ends: 21221 [2023-03-31 23:37:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:37:16,569 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 213 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1455 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:37:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21221 states. [2023-03-31 23:37:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21221 to 21221. [2023-03-31 23:37:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21221 states, 15147 states have (on average 1.540701128936423) internal successors, (23337), 16083 states have internal predecessors, (23337), 4110 states have call successors, (4110), 1658 states have call predecessors, (4110), 1963 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-03-31 23:37:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21221 states to 21221 states and 33349 transitions. [2023-03-31 23:37:18,115 INFO L78 Accepts]: Start accepts. Automaton has 21221 states and 33349 transitions. Word has length 296 [2023-03-31 23:37:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:18,115 INFO L495 AbstractCegarLoop]: Abstraction has 21221 states and 33349 transitions. [2023-03-31 23:37:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-03-31 23:37:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21221 states and 33349 transitions. [2023-03-31 23:37:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-03-31 23:37:18,123 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:18,124 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:18,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:18,337 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,SelfDestructingSolverStorable14 [2023-03-31 23:37:18,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:18,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2049773673, now seen corresponding path program 1 times [2023-03-31 23:37:18,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:18,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12260126] [2023-03-31 23:37:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-03-31 23:37:18,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12260126] [2023-03-31 23:37:18,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12260126] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:18,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869361891] [2023-03-31 23:37:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:18,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:18,628 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) [2023-03-31 23:37:18,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:37:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:19,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 3916 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:37:19,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-03-31 23:37:19,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:19,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869361891] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:19,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:19,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:37:19,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335017558] [2023-03-31 23:37:19,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:19,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:37:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:19,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:37:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:37:19,280 INFO L87 Difference]: Start difference. First operand 21221 states and 33349 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-03-31 23:37:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:20,401 INFO L93 Difference]: Finished difference Result 44388 states and 71205 transitions. [2023-03-31 23:37:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:37:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 306 [2023-03-31 23:37:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:20,496 INFO L225 Difference]: With dead ends: 44388 [2023-03-31 23:37:20,496 INFO L226 Difference]: Without dead ends: 23210 [2023-03-31 23:37:20,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:37:20,556 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 211 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:20,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1455 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:37:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23210 states. [2023-03-31 23:37:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23210 to 23210. [2023-03-31 23:37:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 17085 states have (on average 1.5838454784899034) internal successors, (27060), 18021 states have internal predecessors, (27060), 4110 states have call successors, (4110), 1709 states have call predecessors, (4110), 2014 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-03-31 23:37:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 37072 transitions. [2023-03-31 23:37:21,803 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 37072 transitions. Word has length 306 [2023-03-31 23:37:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:21,804 INFO L495 AbstractCegarLoop]: Abstraction has 23210 states and 37072 transitions. [2023-03-31 23:37:21,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2023-03-31 23:37:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 37072 transitions. [2023-03-31 23:37:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-03-31 23:37:21,811 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:21,811 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:21,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:22,022 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:22,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 359550384, now seen corresponding path program 1 times [2023-03-31 23:37:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070638706] [2023-03-31 23:37:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 15 proven. 60 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2023-03-31 23:37:22,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:22,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070638706] [2023-03-31 23:37:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070638706] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061602929] [2023-03-31 23:37:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:22,320 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) [2023-03-31 23:37:22,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:37:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:22,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 3923 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:37:22,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-03-31 23:37:22,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061602929] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:22,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:22,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:37:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996450659] [2023-03-31 23:37:22,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:37:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:37:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:37:22,991 INFO L87 Difference]: Start difference. First operand 23210 states and 37072 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, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-03-31 23:37:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:24,123 INFO L93 Difference]: Finished difference Result 48366 states and 78600 transitions. [2023-03-31 23:37:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:37:24,123 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, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 313 [2023-03-31 23:37:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:24,194 INFO L225 Difference]: With dead ends: 48366 [2023-03-31 23:37:24,194 INFO L226 Difference]: Without dead ends: 25199 [2023-03-31 23:37:24,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:37:24,236 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 209 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:24,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1455 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:37:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25199 states. [2023-03-31 23:37:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25199 to 25199. [2023-03-31 23:37:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25199 states, 19023 states have (on average 1.6181990222362403) internal successors, (30783), 19959 states have internal predecessors, (30783), 4110 states have call successors, (4110), 1760 states have call predecessors, (4110), 2065 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-03-31 23:37:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25199 states to 25199 states and 40795 transitions. [2023-03-31 23:37:25,286 INFO L78 Accepts]: Start accepts. Automaton has 25199 states and 40795 transitions. Word has length 313 [2023-03-31 23:37:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:25,287 INFO L495 AbstractCegarLoop]: Abstraction has 25199 states and 40795 transitions. [2023-03-31 23:37:25,287 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, (52), 2 states have call predecessors, (52), 3 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2023-03-31 23:37:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25199 states and 40795 transitions. [2023-03-31 23:37:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-03-31 23:37:25,293 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:25,293 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:25,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:25,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-03-31 23:37:25,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:25,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1019470000, now seen corresponding path program 1 times [2023-03-31 23:37:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:25,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26729476] [2023-03-31 23:37:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-03-31 23:37:25,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26729476] [2023-03-31 23:37:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26729476] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995329050] [2023-03-31 23:37:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:25,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:25,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:25,833 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) [2023-03-31 23:37:25,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:37:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:26,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 3931 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:37:26,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-03-31 23:37:26,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995329050] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:26,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:26,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:37:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413132559] [2023-03-31 23:37:26,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:26,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:37:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:37:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:37:26,462 INFO L87 Difference]: Start difference. First operand 25199 states and 40795 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-03-31 23:37:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:37:27,685 INFO L93 Difference]: Finished difference Result 52344 states and 85995 transitions. [2023-03-31 23:37:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:37:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 321 [2023-03-31 23:37:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:37:27,771 INFO L225 Difference]: With dead ends: 52344 [2023-03-31 23:37:27,772 INFO L226 Difference]: Without dead ends: 27188 [2023-03-31 23:37:27,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:37:27,814 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 207 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:37:27,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1455 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:37:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27188 states. [2023-03-31 23:37:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27188 to 27188. [2023-03-31 23:37:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 20961 states have (on average 1.6462000858737655) internal successors, (34506), 21897 states have internal predecessors, (34506), 4110 states have call successors, (4110), 1811 states have call predecessors, (4110), 2116 states have return successors, (5902), 3803 states have call predecessors, (5902), 4087 states have call successors, (5902) [2023-03-31 23:37:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 44518 transitions. [2023-03-31 23:37:28,889 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 44518 transitions. Word has length 321 [2023-03-31 23:37:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:37:28,890 INFO L495 AbstractCegarLoop]: Abstraction has 27188 states and 44518 transitions. [2023-03-31 23:37:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2023-03-31 23:37:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 44518 transitions. [2023-03-31 23:37:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-03-31 23:37:28,895 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:37:28,895 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:37:28,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:37:29,095 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,SelfDestructingSolverStorable17 [2023-03-31 23:37:29,096 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:37:29,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:37:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1541692917, now seen corresponding path program 1 times [2023-03-31 23:37:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:37:29,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082406328] [2023-03-31 23:37:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:29,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:37:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-03-31 23:37:29,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:37:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082406328] [2023-03-31 23:37:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082406328] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:37:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022962630] [2023-03-31 23:37:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:37:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:37:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:37:29,940 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) [2023-03-31 23:37:29,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:37:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:37:30,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 3922 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:37:30,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:37:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-03-31 23:37:30,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:37:30,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022962630] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:37:30,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:37:30,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-03-31 23:37:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023930953] [2023-03-31 23:37:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:37:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:37:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:37:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:37:30,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:37:30,747 INFO L87 Difference]: Start difference. First operand 27188 states and 44518 transitions. Second operand has 9 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 5 states have call successors, (46), 4 states have call predecessors, (46), 6 states have return successors, (44), 7 states have call predecessors, (44), 4 states have call successors, (44)