/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:28:33,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:28:33,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:28:33,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:28:33,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:28:33,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:28:33,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:28:33,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:28:33,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:28:33,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:28:33,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:28:33,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:28:33,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:28:33,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:28:33,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:28:33,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:28:33,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:28:33,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:28:33,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:28:33,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:28:33,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:28:33,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:28:33,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:28:33,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:28:33,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:28:33,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:28:33,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:28:33,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:28:33,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:28:33,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:28:33,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:28:33,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:28:33,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:28:33,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:28:33,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:28:33,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:28:33,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:28:33,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:28:33,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:28:33,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:28:33,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:28:33,818 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 [2023-04-03 02:28:33,848 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:28:33,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:28:33,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:28:33,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:28:33,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:28:33,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:28:33,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:28:33,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:28:33,851 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:28:33,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:28:33,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:28:33,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:28:33,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:28:33,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:28:33,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:28:33,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:28:33,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:28:33,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:28:34,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:28:34,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:28:34,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:28:34,126 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:28:34,127 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:28:34,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-03 02:28:35,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:28:35,707 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:28:35,708 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-03 02:28:35,731 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93144e753/a015ed2c1ea84b79bb2c958bf7815a4a/FLAG39bfe5711 [2023-04-03 02:28:35,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93144e753/a015ed2c1ea84b79bb2c958bf7815a4a [2023-04-03 02:28:35,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:28:35,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:28:35,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:28:35,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:28:35,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:28:35,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:28:35" (1/1) ... [2023-04-03 02:28:35,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7009766e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:35, skipping insertion in model container [2023-04-03 02:28:35,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:28:35" (1/1) ... [2023-04-03 02:28:35,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:28:35,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:28:36,327 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[31682,31695] [2023-04-03 02:28:36,353 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[32572,32585] [2023-04-03 02:28:36,377 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[34231,34244] [2023-04-03 02:28:36,390 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[35121,35134] [2023-04-03 02:28:36,418 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[37552,37565] [2023-04-03 02:28:36,435 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[38445,38458] [2023-04-03 02:28:36,456 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[40107,40120] [2023-04-03 02:28:36,474 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[41468,41481] [2023-04-03 02:28:36,609 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[55332,55345] [2023-04-03 02:28:36,622 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[56225,56238] [2023-04-03 02:28:36,663 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[57887,57900] [2023-04-03 02:28:36,704 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[62044,62057] [2023-04-03 02:28:36,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:28:36,812 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:28:36,971 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[31682,31695] [2023-04-03 02:28:36,982 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[32572,32585] [2023-04-03 02:28:36,998 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[34231,34244] [2023-04-03 02:28:37,008 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[35121,35134] [2023-04-03 02:28:37,029 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[37552,37565] [2023-04-03 02:28:37,040 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[38445,38458] [2023-04-03 02:28:37,057 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[40107,40120] [2023-04-03 02:28:37,071 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[41468,41481] [2023-04-03 02:28:37,163 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[55332,55345] [2023-04-03 02:28:37,174 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[56225,56238] [2023-04-03 02:28:37,189 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[57887,57900] [2023-04-03 02:28:37,225 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/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[62044,62057] [2023-04-03 02:28:37,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:28:37,327 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:28:37,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37 WrapperNode [2023-04-03 02:28:37,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:28:37,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:28:37,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:28:37,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:28:37,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:28:37,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:28:37,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:28:37,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:28:37,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (1/1) ... [2023-04-03 02:28:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:28:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:28:37,532 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) [2023-04-03 02:28:37,541 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 [2023-04-03 02:28:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:28:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:28:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:28:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:28:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:28:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:28:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:28:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:28:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:28:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:28:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:28:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:28:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:28:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:28:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:28:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:28:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:28:37,802 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:28:37,804 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:28:39,760 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:28:40,619 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:28:40,619 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:28:40,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:28:40 BoogieIcfgContainer [2023-04-03 02:28:40,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:28:40,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:28:40,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:28:40,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:28:40,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:28:35" (1/3) ... [2023-04-03 02:28:40,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a2f29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:28:40, skipping insertion in model container [2023-04-03 02:28:40,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:28:37" (2/3) ... [2023-04-03 02:28:40,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a2f29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:28:40, skipping insertion in model container [2023-04-03 02:28:40,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:28:40" (3/3) ... [2023-04-03 02:28:40,633 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-03 02:28:40,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:28:40,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-04-03 02:28:40,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:28:40,714 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;@33cf28a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:28:40,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-04-03 02:28:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 713 states, 689 states have (on average 1.7460087082728593) internal successors, (1203), 708 states have internal predecessors, (1203), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:28:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-03 02:28:40,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:40,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:40,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:40,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1223253238, now seen corresponding path program 1 times [2023-04-03 02:28:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070813300] [2023-04-03 02:28:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:42,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:42,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070813300] [2023-04-03 02:28:42,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070813300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:42,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:42,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:28:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443707636] [2023-04-03 02:28:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:28:42,652 INFO L87 Difference]: Start difference. First operand has 713 states, 689 states have (on average 1.7460087082728593) internal successors, (1203), 708 states have internal predecessors, (1203), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:43,197 INFO L93 Difference]: Finished difference Result 2099 states and 3562 transitions. [2023-04-03 02:28:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:28:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2023-04-03 02:28:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:43,225 INFO L225 Difference]: With dead ends: 2099 [2023-04-03 02:28:43,225 INFO L226 Difference]: Without dead ends: 1377 [2023-04-03 02:28:43,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:28:43,237 INFO L413 NwaCegarLoop]: 1955 mSDtfsCounter, 2533 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:43,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2533 Valid, 3045 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:28:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2023-04-03 02:28:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1316. [2023-04-03 02:28:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1301 states have (on average 1.3674096848578017) internal successors, (1779), 1312 states have internal predecessors, (1779), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1782 transitions. [2023-04-03 02:28:43,379 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1782 transitions. Word has length 265 [2023-04-03 02:28:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:43,382 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 1782 transitions. [2023-04-03 02:28:43,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1782 transitions. [2023-04-03 02:28:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-03 02:28:43,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:43,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:43,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:28:43,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:43,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1121075948, now seen corresponding path program 1 times [2023-04-03 02:28:43,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:43,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528798135] [2023-04-03 02:28:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:43,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528798135] [2023-04-03 02:28:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528798135] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:28:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173365514] [2023-04-03 02:28:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:43,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:28:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:28:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:43,733 INFO L87 Difference]: Start difference. First operand 1316 states and 1782 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:44,154 INFO L93 Difference]: Finished difference Result 3912 states and 5296 transitions. [2023-04-03 02:28:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:28:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2023-04-03 02:28:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:44,166 INFO L225 Difference]: With dead ends: 3912 [2023-04-03 02:28:44,166 INFO L226 Difference]: Without dead ends: 2617 [2023-04-03 02:28:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:44,173 INFO L413 NwaCegarLoop]: 1758 mSDtfsCounter, 928 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:44,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 2636 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:28:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2023-04-03 02:28:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 1319. [2023-04-03 02:28:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1304 states have (on average 1.366564417177914) internal successors, (1782), 1315 states have internal predecessors, (1782), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1785 transitions. [2023-04-03 02:28:44,335 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1785 transitions. Word has length 267 [2023-04-03 02:28:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:44,335 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1785 transitions. [2023-04-03 02:28:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1785 transitions. [2023-04-03 02:28:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-03 02:28:44,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:44,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:44,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:28:44,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:44,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash -251800296, now seen corresponding path program 1 times [2023-04-03 02:28:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:44,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286627987] [2023-04-03 02:28:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:44,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:44,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:44,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286627987] [2023-04-03 02:28:44,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286627987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:44,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:28:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360663845] [2023-04-03 02:28:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:44,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:28:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:28:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:44,642 INFO L87 Difference]: Start difference. First operand 1319 states and 1785 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:45,142 INFO L93 Difference]: Finished difference Result 3782 states and 5091 transitions. [2023-04-03 02:28:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:28:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2023-04-03 02:28:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:45,155 INFO L225 Difference]: With dead ends: 3782 [2023-04-03 02:28:45,155 INFO L226 Difference]: Without dead ends: 2591 [2023-04-03 02:28:45,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:45,162 INFO L413 NwaCegarLoop]: 1669 mSDtfsCounter, 816 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:45,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 2519 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:28:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2023-04-03 02:28:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2530. [2023-04-03 02:28:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2515 states have (on average 1.3662027833001988) internal successors, (3436), 2526 states have internal predecessors, (3436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3439 transitions. [2023-04-03 02:28:45,448 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3439 transitions. Word has length 267 [2023-04-03 02:28:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:45,450 INFO L495 AbstractCegarLoop]: Abstraction has 2530 states and 3439 transitions. [2023-04-03 02:28:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3439 transitions. [2023-04-03 02:28:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-04-03 02:28:45,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:45,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:28:45,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:45,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1988991665, now seen corresponding path program 1 times [2023-04-03 02:28:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39283243] [2023-04-03 02:28:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:46,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39283243] [2023-04-03 02:28:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39283243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:46,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:46,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:28:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585251858] [2023-04-03 02:28:46,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:28:46,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:28:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:28:46,402 INFO L87 Difference]: Start difference. First operand 2530 states and 3439 transitions. Second operand has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:47,247 INFO L93 Difference]: Finished difference Result 7364 states and 9980 transitions. [2023-04-03 02:28:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:28:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2023-04-03 02:28:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:47,267 INFO L225 Difference]: With dead ends: 7364 [2023-04-03 02:28:47,267 INFO L226 Difference]: Without dead ends: 4853 [2023-04-03 02:28:47,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:28:47,275 INFO L413 NwaCegarLoop]: 1497 mSDtfsCounter, 2076 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:47,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2076 Valid, 3177 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:28:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2023-04-03 02:28:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4792. [2023-04-03 02:28:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4792 states, 4777 states have (on average 1.3554532133137953) internal successors, (6475), 4788 states have internal predecessors, (6475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4792 states to 4792 states and 6478 transitions. [2023-04-03 02:28:47,804 INFO L78 Accepts]: Start accepts. Automaton has 4792 states and 6478 transitions. Word has length 268 [2023-04-03 02:28:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:47,805 INFO L495 AbstractCegarLoop]: Abstraction has 4792 states and 6478 transitions. [2023-04-03 02:28:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4792 states and 6478 transitions. [2023-04-03 02:28:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-03 02:28:47,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:47,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:47,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:28:47,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:47,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -453666756, now seen corresponding path program 1 times [2023-04-03 02:28:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:47,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812460314] [2023-04-03 02:28:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:48,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812460314] [2023-04-03 02:28:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812460314] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:28:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707925905] [2023-04-03 02:28:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:48,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:28:48,780 INFO L87 Difference]: Start difference. First operand 4792 states and 6478 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:50,132 INFO L93 Difference]: Finished difference Result 14044 states and 18941 transitions. [2023-04-03 02:28:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:28:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2023-04-03 02:28:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:50,169 INFO L225 Difference]: With dead ends: 14044 [2023-04-03 02:28:50,170 INFO L226 Difference]: Without dead ends: 9394 [2023-04-03 02:28:50,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:28:50,181 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 1971 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 2337 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:50,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1971 Valid, 2337 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:28:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9394 states. [2023-04-03 02:28:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9394 to 9333. [2023-04-03 02:28:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9333 states, 9318 states have (on average 1.3480360592401803) internal successors, (12561), 9329 states have internal predecessors, (12561), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 12564 transitions. [2023-04-03 02:28:51,371 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 12564 transitions. Word has length 269 [2023-04-03 02:28:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:51,372 INFO L495 AbstractCegarLoop]: Abstraction has 9333 states and 12564 transitions. [2023-04-03 02:28:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 12564 transitions. [2023-04-03 02:28:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-04-03 02:28:51,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:51,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:51,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:28:51,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:51,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:51,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2047029769, now seen corresponding path program 1 times [2023-04-03 02:28:51,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705321873] [2023-04-03 02:28:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:52,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:52,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705321873] [2023-04-03 02:28:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705321873] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:52,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:52,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:28:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391159243] [2023-04-03 02:28:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:52,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:28:52,345 INFO L87 Difference]: Start difference. First operand 9333 states and 12564 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:54,833 INFO L93 Difference]: Finished difference Result 27451 states and 36875 transitions. [2023-04-03 02:28:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:28:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2023-04-03 02:28:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:54,909 INFO L225 Difference]: With dead ends: 27451 [2023-04-03 02:28:54,909 INFO L226 Difference]: Without dead ends: 18264 [2023-04-03 02:28:54,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:28:54,932 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 1950 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:54,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1950 Valid, 2314 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:28:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18264 states. [2023-04-03 02:28:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18264 to 18203. [2023-04-03 02:28:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18203 states, 18188 states have (on average 1.3379151088629866) internal successors, (24334), 18199 states have internal predecessors, (24334), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18203 states to 18203 states and 24337 transitions. [2023-04-03 02:28:57,396 INFO L78 Accepts]: Start accepts. Automaton has 18203 states and 24337 transitions. Word has length 271 [2023-04-03 02:28:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:57,396 INFO L495 AbstractCegarLoop]: Abstraction has 18203 states and 24337 transitions. [2023-04-03 02:28:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18203 states and 24337 transitions. [2023-04-03 02:28:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-03 02:28:57,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:57,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:28:57,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:28:57,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 116971854, now seen corresponding path program 1 times [2023-04-03 02:28:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928417468] [2023-04-03 02:28:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:28:57,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928417468] [2023-04-03 02:28:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928417468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:57,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:28:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815287822] [2023-04-03 02:28:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:28:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:28:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:57,672 INFO L87 Difference]: Start difference. First operand 18203 states and 24337 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:29:01,447 INFO L93 Difference]: Finished difference Result 52396 states and 69652 transitions. [2023-04-03 02:29:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:29:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2023-04-03 02:29:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:29:01,561 INFO L225 Difference]: With dead ends: 52396 [2023-04-03 02:29:01,562 INFO L226 Difference]: Without dead ends: 35759 [2023-04-03 02:29:01,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:29:01,625 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 799 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:29:01,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 2532 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:29:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35759 states. [2023-04-03 02:29:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35759 to 35698. [2023-04-03 02:29:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35698 states, 35683 states have (on average 1.3309699296583808) internal successors, (47493), 35694 states have internal predecessors, (47493), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35698 states to 35698 states and 47496 transitions. [2023-04-03 02:29:05,461 INFO L78 Accepts]: Start accepts. Automaton has 35698 states and 47496 transitions. Word has length 273 [2023-04-03 02:29:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:29:05,462 INFO L495 AbstractCegarLoop]: Abstraction has 35698 states and 47496 transitions. [2023-04-03 02:29:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 35698 states and 47496 transitions. [2023-04-03 02:29:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-03 02:29:05,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:29:05,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:29:05,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:29:05,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:29:05,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:29:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -344999041, now seen corresponding path program 1 times [2023-04-03 02:29:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:29:05,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151215835] [2023-04-03 02:29:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:29:05,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:29:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:29:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:29:05,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:29:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151215835] [2023-04-03 02:29:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151215835] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:29:05,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:29:05,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:29:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034676852] [2023-04-03 02:29:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:29:05,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:29:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:29:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:29:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:29:05,908 INFO L87 Difference]: Start difference. First operand 35698 states and 47496 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:29:11,619 INFO L93 Difference]: Finished difference Result 105151 states and 139598 transitions. [2023-04-03 02:29:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:29:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2023-04-03 02:29:11,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:29:11,829 INFO L225 Difference]: With dead ends: 105151 [2023-04-03 02:29:11,830 INFO L226 Difference]: Without dead ends: 71143 [2023-04-03 02:29:11,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:29:11,897 INFO L413 NwaCegarLoop]: 1737 mSDtfsCounter, 904 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:29:11,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 2615 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:29:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71143 states. [2023-04-03 02:29:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71143 to 35731. [2023-04-03 02:29:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35731 states, 35716 states have (on average 1.33066412812185) internal successors, (47526), 35727 states have internal predecessors, (47526), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35731 states to 35731 states and 47529 transitions. [2023-04-03 02:29:15,895 INFO L78 Accepts]: Start accepts. Automaton has 35731 states and 47529 transitions. Word has length 273 [2023-04-03 02:29:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:29:15,895 INFO L495 AbstractCegarLoop]: Abstraction has 35731 states and 47529 transitions. [2023-04-03 02:29:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 35731 states and 47529 transitions. [2023-04-03 02:29:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-03 02:29:15,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:29:15,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:29:15,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:29:15,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:29:15,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:29:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash -72048942, now seen corresponding path program 1 times [2023-04-03 02:29:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:29:15,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429507086] [2023-04-03 02:29:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:29:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:29:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:29:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:29:16,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:29:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429507086] [2023-04-03 02:29:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429507086] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:29:16,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:29:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:29:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511604189] [2023-04-03 02:29:16,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:29:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:29:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:29:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:29:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:29:16,739 INFO L87 Difference]: Start difference. First operand 35731 states and 47529 transitions. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:29:23,692 INFO L93 Difference]: Finished difference Result 104220 states and 138178 transitions. [2023-04-03 02:29:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:29:23,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2023-04-03 02:29:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:29:23,867 INFO L225 Difference]: With dead ends: 104220 [2023-04-03 02:29:23,868 INFO L226 Difference]: Without dead ends: 68693 [2023-04-03 02:29:23,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:29:23,932 INFO L413 NwaCegarLoop]: 1483 mSDtfsCounter, 1793 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:29:23,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 3174 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:29:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68693 states. [2023-04-03 02:29:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68693 to 68632. [2023-04-03 02:29:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68632 states, 68617 states have (on average 1.3193960680297885) internal successors, (90533), 68628 states have internal predecessors, (90533), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68632 states to 68632 states and 90536 transitions. [2023-04-03 02:29:30,762 INFO L78 Accepts]: Start accepts. Automaton has 68632 states and 90536 transitions. Word has length 274 [2023-04-03 02:29:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:29:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 68632 states and 90536 transitions. [2023-04-03 02:29:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 68632 states and 90536 transitions. [2023-04-03 02:29:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-04-03 02:29:30,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:29:30,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:29:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:29:30,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:29:30,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:29:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1048194130, now seen corresponding path program 1 times [2023-04-03 02:29:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:29:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338538748] [2023-04-03 02:29:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:29:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:29:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:29:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:29:31,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:29:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338538748] [2023-04-03 02:29:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338538748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:29:31,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:29:31,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:29:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047842776] [2023-04-03 02:29:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:29:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:29:31,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:29:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:29:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:29:31,520 INFO L87 Difference]: Start difference. First operand 68632 states and 90536 transitions. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:29:45,125 INFO L93 Difference]: Finished difference Result 201072 states and 264434 transitions. [2023-04-03 02:29:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:29:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2023-04-03 02:29:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:29:45,515 INFO L225 Difference]: With dead ends: 201072 [2023-04-03 02:29:45,515 INFO L226 Difference]: Without dead ends: 134708 [2023-04-03 02:29:45,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:29:45,625 INFO L413 NwaCegarLoop]: 1482 mSDtfsCounter, 1961 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:29:45,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 2333 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:29:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134708 states. [2023-04-03 02:29:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134708 to 134647. [2023-04-03 02:29:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134647 states, 134632 states have (on average 1.3119020738011766) internal successors, (176624), 134643 states have internal predecessors, (176624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134647 states to 134647 states and 176627 transitions. [2023-04-03 02:29:59,945 INFO L78 Accepts]: Start accepts. Automaton has 134647 states and 176627 transitions. Word has length 275 [2023-04-03 02:29:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:29:59,945 INFO L495 AbstractCegarLoop]: Abstraction has 134647 states and 176627 transitions. [2023-04-03 02:29:59,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 134647 states and 176627 transitions. [2023-04-03 02:30:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-03 02:30:00,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:30:00,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:30:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:30:00,105 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:30:00,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:30:00,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1301621525, now seen corresponding path program 1 times [2023-04-03 02:30:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:30:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645924611] [2023-04-03 02:30:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:30:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:30:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:30:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:30:01,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:30:01,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645924611] [2023-04-03 02:30:01,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645924611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:30:01,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:30:01,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:30:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360355850] [2023-04-03 02:30:01,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:30:01,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:30:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:30:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:30:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:30:01,040 INFO L87 Difference]: Start difference. First operand 134647 states and 176627 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:30:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:30:17,687 INFO L93 Difference]: Finished difference Result 286285 states and 375555 transitions. [2023-04-03 02:30:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:30:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2023-04-03 02:30:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:30:18,024 INFO L225 Difference]: With dead ends: 286285 [2023-04-03 02:30:18,024 INFO L226 Difference]: Without dead ends: 153143 [2023-04-03 02:30:18,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:30:18,153 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 1934 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:30:18,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 2304 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:30:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153143 states. [2023-04-03 02:30:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153143 to 136570. [2023-04-03 02:30:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136570 states, 136555 states have (on average 1.3132364248837465) internal successors, (179329), 136566 states have internal predecessors, (179329), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:30:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136570 states to 136570 states and 179332 transitions. [2023-04-03 02:30:33,888 INFO L78 Accepts]: Start accepts. Automaton has 136570 states and 179332 transitions. Word has length 277 [2023-04-03 02:30:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:30:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 136570 states and 179332 transitions. [2023-04-03 02:30:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:30:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 136570 states and 179332 transitions. [2023-04-03 02:30:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-04-03 02:30:34,051 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:30:34,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:30:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:30:34,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-04-03 02:30:34,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:30:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -896481812, now seen corresponding path program 1 times [2023-04-03 02:30:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:30:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621704627] [2023-04-03 02:30:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:30:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:30:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:30:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:30:34,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:30:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621704627] [2023-04-03 02:30:34,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621704627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:30:34,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:30:34,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:30:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048733616] [2023-04-03 02:30:34,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:30:34,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:30:34,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:30:34,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:30:34,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:30:34,238 INFO L87 Difference]: Start difference. First operand 136570 states and 179332 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)