/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:40:51,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:40:51,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:40:51,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:40:51,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:40:51,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:40:51,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:40:51,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:40:51,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:40:51,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:40:51,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:40:51,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:40:51,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:40:51,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:40:51,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:40:51,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:40:51,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:40:51,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:40:51,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:40:51,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:40:51,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:40:51,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:40:51,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:40:51,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:40:51,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:40:51,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:40:51,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:40:51,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:40:51,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:40:51,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:40:51,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:40:51,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:40:51,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:40:51,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:40:51,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:40:51,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:40:51,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:40:51,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:40:51,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:40:51,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:40:51,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:40:51,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:40:51,866 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:40:51,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:40:51,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:40:51,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:40:51,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:40:51,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:40:51,868 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:40:51,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:40:51,868 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:40:51,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:40:51,869 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:40:51,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:40:51,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:40:51,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:40:51,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:40:51,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:40:51,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:40:51,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:40:52,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:40:52,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:40:52,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:40:52,094 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:40:52,095 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:40:52,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-04-01 11:40:53,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:40:53,556 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:40:53,556 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-04-01 11:40:53,572 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31976495/6cd1dd267be446eb8bd8d3687b7bd327/FLAG38941ccfe [2023-04-01 11:40:53,582 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31976495/6cd1dd267be446eb8bd8d3687b7bd327 [2023-04-01 11:40:53,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:40:53,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:40:53,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:40:53,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:40:53,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:40:53,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:40:53" (1/1) ... [2023-04-01 11:40:53,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d32d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:53, skipping insertion in model container [2023-04-01 11:40:53,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:40:53" (1/1) ... [2023-04-01 11:40:53,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:40:53,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:40:53,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-04-01 11:40:53,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:40:53,946 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:40:54,006 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-04-01 11:40:54,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:40:54,048 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:40:54,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54 WrapperNode [2023-04-01 11:40:54,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:40:54,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:40:54,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:40:54,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:40:54,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:40:54,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:40:54,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:40:54,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:40:54,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (1/1) ... [2023-04-01 11:40:54,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:40:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:40:54,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:40:54,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:40:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:40:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:40:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:40:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:40:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:40:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:40:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:40:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:40:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:40:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:40:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:40:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:40:54,275 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:40:54,275 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:40:54,275 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:40:54,275 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:40:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:40:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:40:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:40:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:40:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:40:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:40:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:40:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:40:54,480 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:40:54,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:40:55,355 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:40:55,966 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:40:55,967 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:40:55,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:55 BoogieIcfgContainer [2023-04-01 11:40:55,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:40:55,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:40:55,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:40:55,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:40:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:40:53" (1/3) ... [2023-04-01 11:40:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571df3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:55, skipping insertion in model container [2023-04-01 11:40:55,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:54" (2/3) ... [2023-04-01 11:40:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571df3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:55, skipping insertion in model container [2023-04-01 11:40:55,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:55" (3/3) ... [2023-04-01 11:40:55,977 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2023-04-01 11:40:55,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:40:55,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:40:56,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:40:56,090 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;@4726d957, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:40:56,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:40:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 11:40:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 11:40:56,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:56,127 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] [2023-04-01 11:40:56,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:56,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1491857156, now seen corresponding path program 1 times [2023-04-01 11:40:56,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:56,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946722045] [2023-04-01 11:40:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:40:57,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946722045] [2023-04-01 11:40:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946722045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:57,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:57,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 11:40:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025289988] [2023-04-01 11:40:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:40:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:40:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:40:57,207 INFO L87 Difference]: Start difference. First operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 11:41:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:00,094 INFO L93 Difference]: Finished difference Result 1394 states and 2144 transitions. [2023-04-01 11:41:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 11:41:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) Word has length 106 [2023-04-01 11:41:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:00,125 INFO L225 Difference]: With dead ends: 1394 [2023-04-01 11:41:00,126 INFO L226 Difference]: Without dead ends: 975 [2023-04-01 11:41:00,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:41:00,133 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1808 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 5830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:00,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 938 Invalid, 5830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [577 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 11:41:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-04-01 11:41:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 943. [2023-04-01 11:41:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 627 states have (on average 1.5598086124401913) internal successors, (978), 658 states have internal predecessors, (978), 232 states have call successors, (232), 82 states have call predecessors, (232), 83 states have return successors, (236), 226 states have call predecessors, (236), 224 states have call successors, (236) [2023-04-01 11:41:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1446 transitions. [2023-04-01 11:41:00,221 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1446 transitions. Word has length 106 [2023-04-01 11:41:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:00,221 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1446 transitions. [2023-04-01 11:41:00,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 11:41:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1446 transitions. [2023-04-01 11:41:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 11:41:00,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:00,225 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:00,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:41:00,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:00,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2011034527, now seen corresponding path program 1 times [2023-04-01 11:41:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362466050] [2023-04-01 11:41:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:00,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362466050] [2023-04-01 11:41:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362466050] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:00,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:00,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093574408] [2023-04-01 11:41:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:00,462 INFO L87 Difference]: Start difference. First operand 943 states and 1446 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:00,643 INFO L93 Difference]: Finished difference Result 1509 states and 2328 transitions. [2023-04-01 11:41:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:41:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-01 11:41:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:00,649 INFO L225 Difference]: With dead ends: 1509 [2023-04-01 11:41:00,649 INFO L226 Difference]: Without dead ends: 980 [2023-04-01 11:41:00,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:00,652 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:00,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-04-01 11:41:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 964. [2023-04-01 11:41:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 642 states have (on average 1.5467289719626167) internal successors, (993), 673 states have internal predecessors, (993), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 232 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 11:41:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1476 transitions. [2023-04-01 11:41:00,730 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1476 transitions. Word has length 112 [2023-04-01 11:41:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1476 transitions. [2023-04-01 11:41:00,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1476 transitions. [2023-04-01 11:41:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 11:41:00,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:00,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:00,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:41:00,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:00,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash -817311297, now seen corresponding path program 1 times [2023-04-01 11:41:00,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:00,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10786537] [2023-04-01 11:41:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:00,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10786537] [2023-04-01 11:41:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10786537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:00,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:00,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844775128] [2023-04-01 11:41:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:00,936 INFO L87 Difference]: Start difference. First operand 964 states and 1476 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:01,100 INFO L93 Difference]: Finished difference Result 1538 states and 2366 transitions. [2023-04-01 11:41:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:41:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-04-01 11:41:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:01,105 INFO L225 Difference]: With dead ends: 1538 [2023-04-01 11:41:01,105 INFO L226 Difference]: Without dead ends: 995 [2023-04-01 11:41:01,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:01,108 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:01,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-04-01 11:41:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 967. [2023-04-01 11:41:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 645 states have (on average 1.544186046511628) internal successors, (996), 673 states have internal predecessors, (996), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 235 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 11:41:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1479 transitions. [2023-04-01 11:41:01,146 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1479 transitions. Word has length 112 [2023-04-01 11:41:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:01,146 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1479 transitions. [2023-04-01 11:41:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1479 transitions. [2023-04-01 11:41:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 11:41:01,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:01,148 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:01,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:41:01,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:01,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash -523679998, now seen corresponding path program 1 times [2023-04-01 11:41:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:01,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003050673] [2023-04-01 11:41:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:01,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003050673] [2023-04-01 11:41:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003050673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:01,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:01,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945968397] [2023-04-01 11:41:01,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:01,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:01,354 INFO L87 Difference]: Start difference. First operand 967 states and 1479 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:01,544 INFO L93 Difference]: Finished difference Result 1543 states and 2371 transitions. [2023-04-01 11:41:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:41:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-04-01 11:41:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:01,551 INFO L225 Difference]: With dead ends: 1543 [2023-04-01 11:41:01,551 INFO L226 Difference]: Without dead ends: 998 [2023-04-01 11:41:01,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:01,561 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 7 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:01,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3649 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-04-01 11:41:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 970. [2023-04-01 11:41:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 648 states have (on average 1.5416666666666667) internal successors, (999), 673 states have internal predecessors, (999), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 238 states have call predecessors, (251), 224 states have call successors, (251) [2023-04-01 11:41:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1482 transitions. [2023-04-01 11:41:01,601 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1482 transitions. Word has length 111 [2023-04-01 11:41:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:01,601 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1482 transitions. [2023-04-01 11:41:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1482 transitions. [2023-04-01 11:41:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 11:41:01,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:01,603 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:01,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:41:01,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:01,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1680843399, now seen corresponding path program 1 times [2023-04-01 11:41:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:01,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952885009] [2023-04-01 11:41:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:01,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:01,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952885009] [2023-04-01 11:41:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952885009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:41:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663391372] [2023-04-01 11:41:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:41:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:41:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:01,963 INFO L87 Difference]: Start difference. First operand 970 states and 1482 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:41:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:04,048 INFO L93 Difference]: Finished difference Result 2080 states and 3197 transitions. [2023-04-01 11:41:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:41:04,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 116 [2023-04-01 11:41:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:04,056 INFO L225 Difference]: With dead ends: 2080 [2023-04-01 11:41:04,056 INFO L226 Difference]: Without dead ends: 1408 [2023-04-01 11:41:04,059 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 [2023-04-01 11:41:04,060 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2566 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2747 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:04,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2747 Valid, 370 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:41:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-04-01 11:41:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1358. [2023-04-01 11:41:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 890 states have (on average 1.4955056179775281) internal successors, (1331), 930 states have internal predecessors, (1331), 334 states have call successors, (334), 122 states have call predecessors, (334), 133 states have return successors, (371), 341 states have call predecessors, (371), 326 states have call successors, (371) [2023-04-01 11:41:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2036 transitions. [2023-04-01 11:41:04,139 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2036 transitions. Word has length 116 [2023-04-01 11:41:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 2036 transitions. [2023-04-01 11:41:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:41:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2036 transitions. [2023-04-01 11:41:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 11:41:04,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:04,143 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 11:41:04,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:04,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1749536806, now seen corresponding path program 1 times [2023-04-01 11:41:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742432072] [2023-04-01 11:41:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:04,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742432072] [2023-04-01 11:41:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742432072] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:04,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:04,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 11:41:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136389570] [2023-04-01 11:41:04,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:04,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:41:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:04,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:41:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:41:04,392 INFO L87 Difference]: Start difference. First operand 1358 states and 2036 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 11:41:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:04,718 INFO L93 Difference]: Finished difference Result 2646 states and 4067 transitions. [2023-04-01 11:41:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:41:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 118 [2023-04-01 11:41:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:04,725 INFO L225 Difference]: With dead ends: 2646 [2023-04-01 11:41:04,725 INFO L226 Difference]: Without dead ends: 1562 [2023-04-01 11:41:04,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:41:04,730 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 246 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 4823 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:04,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 4823 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:41:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2023-04-01 11:41:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2023-04-01 11:41:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1078 states have (on average 1.507421150278293) internal successors, (1625), 1124 states have internal predecessors, (1625), 339 states have call successors, (339), 127 states have call predecessors, (339), 144 states have return successors, (376), 346 states have call predecessors, (376), 331 states have call successors, (376) [2023-04-01 11:41:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2340 transitions. [2023-04-01 11:41:04,799 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2340 transitions. Word has length 118 [2023-04-01 11:41:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:04,799 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 2340 transitions. [2023-04-01 11:41:04,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 11:41:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2340 transitions. [2023-04-01 11:41:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 11:41:04,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:04,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:41:04,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:04,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 75638369, now seen corresponding path program 1 times [2023-04-01 11:41:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:04,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049415703] [2023-04-01 11:41:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:05,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049415703] [2023-04-01 11:41:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049415703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:05,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:41:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056580696] [2023-04-01 11:41:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:05,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:41:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:41:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:41:05,096 INFO L87 Difference]: Start difference. First operand 1562 states and 2340 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 11:41:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:07,370 INFO L93 Difference]: Finished difference Result 6237 states and 9667 transitions. [2023-04-01 11:41:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:41:07,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 119 [2023-04-01 11:41:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:07,394 INFO L225 Difference]: With dead ends: 6237 [2023-04-01 11:41:07,395 INFO L226 Difference]: Without dead ends: 4718 [2023-04-01 11:41:07,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:41:07,403 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 2191 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 4009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:07,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2268 Valid, 929 Invalid, 4009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 11:41:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2023-04-01 11:41:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4421. [2023-04-01 11:41:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 3101 states have (on average 1.506610770719123) internal successors, (4672), 3233 states have internal predecessors, (4672), 921 states have call successors, (921), 332 states have call predecessors, (921), 398 states have return successors, (1158), 942 states have call predecessors, (1158), 913 states have call successors, (1158) [2023-04-01 11:41:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6751 transitions. [2023-04-01 11:41:07,616 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6751 transitions. Word has length 119 [2023-04-01 11:41:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:07,617 INFO L495 AbstractCegarLoop]: Abstraction has 4421 states and 6751 transitions. [2023-04-01 11:41:07,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-01 11:41:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6751 transitions. [2023-04-01 11:41:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 11:41:07,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:07,619 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:41:07,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:07,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -997623116, now seen corresponding path program 1 times [2023-04-01 11:41:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:07,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592092090] [2023-04-01 11:41:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:07,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:07,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592092090] [2023-04-01 11:41:07,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592092090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:07,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:07,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:07,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319572787] [2023-04-01 11:41:07,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:07,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:07,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:07,910 INFO L87 Difference]: Start difference. First operand 4421 states and 6751 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:41:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:09,854 INFO L93 Difference]: Finished difference Result 7945 states and 12198 transitions. [2023-04-01 11:41:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:41:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 121 [2023-04-01 11:41:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:09,883 INFO L225 Difference]: With dead ends: 7945 [2023-04-01 11:41:09,883 INFO L226 Difference]: Without dead ends: 4591 [2023-04-01 11:41:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:41:09,898 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1047 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:09,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 519 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 11:41:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2023-04-01 11:41:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4505. [2023-04-01 11:41:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 3156 states have (on average 1.5015842839036755) internal successors, (4739), 3300 states have internal predecessors, (4739), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 11:41:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 6857 transitions. [2023-04-01 11:41:10,209 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 6857 transitions. Word has length 121 [2023-04-01 11:41:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:10,209 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 6857 transitions. [2023-04-01 11:41:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:41:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 6857 transitions. [2023-04-01 11:41:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 11:41:10,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:10,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:10,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:41:10,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:10,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1822250551, now seen corresponding path program 1 times [2023-04-01 11:41:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:10,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659756578] [2023-04-01 11:41:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:41:10,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659756578] [2023-04-01 11:41:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659756578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:10,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:10,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:41:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942564512] [2023-04-01 11:41:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:41:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:41:10,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:41:10,425 INFO L87 Difference]: Start difference. First operand 4505 states and 6857 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:41:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:11,032 INFO L93 Difference]: Finished difference Result 4560 states and 6945 transitions. [2023-04-01 11:41:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 125 [2023-04-01 11:41:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:11,056 INFO L225 Difference]: With dead ends: 4560 [2023-04-01 11:41:11,057 INFO L226 Difference]: Without dead ends: 4543 [2023-04-01 11:41:11,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:11,064 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 657 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:11,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1986 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:41:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-04-01 11:41:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4511. [2023-04-01 11:41:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.5006325110689438) internal successors, (4745), 3306 states have internal predecessors, (4745), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 11:41:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6863 transitions. [2023-04-01 11:41:11,362 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6863 transitions. Word has length 125 [2023-04-01 11:41:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:11,363 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6863 transitions. [2023-04-01 11:41:11,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:41:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6863 transitions. [2023-04-01 11:41:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 11:41:11,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:11,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:41:11,366 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:11,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1777065935, now seen corresponding path program 1 times [2023-04-01 11:41:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268867322] [2023-04-01 11:41:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:41:11,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:11,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268867322] [2023-04-01 11:41:11,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268867322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:11,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:11,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:41:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947328717] [2023-04-01 11:41:11,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:11,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:41:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:41:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:11,640 INFO L87 Difference]: Start difference. First operand 4511 states and 6863 transitions. Second operand has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 11:41:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:11,928 INFO L93 Difference]: Finished difference Result 4534 states and 6892 transitions. [2023-04-01 11:41:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:41:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 130 [2023-04-01 11:41:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:11,959 INFO L225 Difference]: With dead ends: 4534 [2023-04-01 11:41:11,959 INFO L226 Difference]: Without dead ends: 4517 [2023-04-01 11:41:11,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:41:11,964 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 10 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4258 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:11,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4258 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2023-04-01 11:41:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4511. [2023-04-01 11:41:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.4981024667931688) internal successors, (4737), 3306 states have internal predecessors, (4737), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-04-01 11:41:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6855 transitions. [2023-04-01 11:41:12,233 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6855 transitions. Word has length 130 [2023-04-01 11:41:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:12,233 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6855 transitions. [2023-04-01 11:41:12,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 11:41:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6855 transitions. [2023-04-01 11:41:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 11:41:12,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:12,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:12,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 11:41:12,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:12,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash -649140589, now seen corresponding path program 1 times [2023-04-01 11:41:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560953930] [2023-04-01 11:41:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:12,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:12,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560953930] [2023-04-01 11:41:12,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560953930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:12,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:12,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:12,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734514939] [2023-04-01 11:41:12,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:12,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:12,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:12,482 INFO L87 Difference]: Start difference. First operand 4511 states and 6855 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:14,000 INFO L93 Difference]: Finished difference Result 13598 states and 21008 transitions. [2023-04-01 11:41:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 144 [2023-04-01 11:41:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:14,051 INFO L225 Difference]: With dead ends: 13598 [2023-04-01 11:41:14,051 INFO L226 Difference]: Without dead ends: 9132 [2023-04-01 11:41:14,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:14,073 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1217 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 507 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 11:41:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2023-04-01 11:41:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 8824. [2023-04-01 11:41:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 6238 states have (on average 1.501763385700545) internal successors, (9368), 6531 states have internal predecessors, (9368), 1743 states have call successors, (1743), 655 states have call predecessors, (1743), 842 states have return successors, (2440), 1775 states have call predecessors, (2440), 1734 states have call successors, (2440) [2023-04-01 11:41:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 13551 transitions. [2023-04-01 11:41:14,667 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 13551 transitions. Word has length 144 [2023-04-01 11:41:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:14,668 INFO L495 AbstractCegarLoop]: Abstraction has 8824 states and 13551 transitions. [2023-04-01 11:41:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 13551 transitions. [2023-04-01 11:41:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 11:41:14,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:14,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 11:41:14,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:14,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1349901977, now seen corresponding path program 1 times [2023-04-01 11:41:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694349390] [2023-04-01 11:41:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:14,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694349390] [2023-04-01 11:41:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694349390] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802426689] [2023-04-01 11:41:14,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:14,967 INFO L87 Difference]: Start difference. First operand 8824 states and 13551 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:16,873 INFO L93 Difference]: Finished difference Result 26525 states and 41635 transitions. [2023-04-01 11:41:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-01 11:41:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:16,968 INFO L225 Difference]: With dead ends: 26525 [2023-04-01 11:41:16,968 INFO L226 Difference]: Without dead ends: 17749 [2023-04-01 11:41:17,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:17,070 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1213 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:17,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 512 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 11:41:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2023-04-01 11:41:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 17354. [2023-04-01 11:41:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 12339 states have (on average 1.50206661804036) internal successors, (18534), 12938 states have internal predecessors, (18534), 3310 states have call successors, (3310), 1271 states have call predecessors, (3310), 1704 states have return successors, (5138), 3390 states have call predecessors, (5138), 3299 states have call successors, (5138) [2023-04-01 11:41:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 26982 transitions. [2023-04-01 11:41:18,264 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 26982 transitions. Word has length 145 [2023-04-01 11:41:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:18,265 INFO L495 AbstractCegarLoop]: Abstraction has 17354 states and 26982 transitions. [2023-04-01 11:41:18,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 26982 transitions. [2023-04-01 11:41:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 11:41:18,268 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:18,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 11:41:18,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:18,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash -123930918, now seen corresponding path program 1 times [2023-04-01 11:41:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669585763] [2023-04-01 11:41:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:18,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:18,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669585763] [2023-04-01 11:41:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669585763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:18,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132179353] [2023-04-01 11:41:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:18,581 INFO L87 Difference]: Start difference. First operand 17354 states and 26982 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:21,677 INFO L93 Difference]: Finished difference Result 52333 states and 84209 transitions. [2023-04-01 11:41:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:21,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-01 11:41:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:21,893 INFO L225 Difference]: With dead ends: 52333 [2023-04-01 11:41:21,893 INFO L226 Difference]: Without dead ends: 35033 [2023-04-01 11:41:21,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:21,958 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1210 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:21,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 517 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 11:41:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35033 states. [2023-04-01 11:41:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35033 to 34473. [2023-04-01 11:41:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34473 states, 24562 states have (on average 1.5005292728605162) internal successors, (36856), 25789 states have internal predecessors, (36856), 6430 states have call successors, (6430), 2503 states have call predecessors, (6430), 3480 states have return successors, (11426), 6642 states have call predecessors, (11426), 6415 states have call successors, (11426) [2023-04-01 11:41:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34473 states to 34473 states and 54712 transitions. [2023-04-01 11:41:24,710 INFO L78 Accepts]: Start accepts. Automaton has 34473 states and 54712 transitions. Word has length 147 [2023-04-01 11:41:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:24,710 INFO L495 AbstractCegarLoop]: Abstraction has 34473 states and 54712 transitions. [2023-04-01 11:41:24,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34473 states and 54712 transitions. [2023-04-01 11:41:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 11:41:24,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:24,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:24,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 11:41:24,713 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:24,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 125365595, now seen corresponding path program 1 times [2023-04-01 11:41:24,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:24,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019338143] [2023-04-01 11:41:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:24,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:24,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019338143] [2023-04-01 11:41:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019338143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:24,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:24,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416349258] [2023-04-01 11:41:24,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:24,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:24,902 INFO L87 Difference]: Start difference. First operand 34473 states and 54712 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:30,394 INFO L93 Difference]: Finished difference Result 104148 states and 174582 transitions. [2023-04-01 11:41:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-01 11:41:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:30,753 INFO L225 Difference]: With dead ends: 104148 [2023-04-01 11:41:30,754 INFO L226 Difference]: Without dead ends: 69741 [2023-04-01 11:41:30,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:30,884 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1207 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:30,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 522 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69741 states. [2023-04-01 11:41:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69741 to 68840. [2023-04-01 11:41:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68840 states, 49057 states have (on average 1.497971747151273) internal successors, (73486), 51572 states have internal predecessors, (73486), 12638 states have call successors, (12638), 4967 states have call predecessors, (12638), 7144 states have return successors, (26910), 13194 states have call predecessors, (26910), 12615 states have call successors, (26910) [2023-04-01 11:41:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68840 states to 68840 states and 113034 transitions. [2023-04-01 11:41:36,132 INFO L78 Accepts]: Start accepts. Automaton has 68840 states and 113034 transitions. Word has length 147 [2023-04-01 11:41:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:36,133 INFO L495 AbstractCegarLoop]: Abstraction has 68840 states and 113034 transitions. [2023-04-01 11:41:36,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 68840 states and 113034 transitions. [2023-04-01 11:41:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 11:41:36,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:36,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:36,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 11:41:36,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:36,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1111286172, now seen corresponding path program 1 times [2023-04-01 11:41:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:36,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136969404] [2023-04-01 11:41:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:36,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136969404] [2023-04-01 11:41:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136969404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:36,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:36,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592333631] [2023-04-01 11:41:36,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:36,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:36,366 INFO L87 Difference]: Start difference. First operand 68840 states and 113034 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:48,145 INFO L93 Difference]: Finished difference Result 208275 states and 372786 transitions. [2023-04-01 11:41:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 149 [2023-04-01 11:41:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:49,190 INFO L225 Difference]: With dead ends: 208275 [2023-04-01 11:41:49,190 INFO L226 Difference]: Without dead ends: 139513 [2023-04-01 11:41:49,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:49,514 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1205 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:49,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 528 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 11:41:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139513 states.