/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:43:49,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:43:49,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:43:49,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:43:49,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:43:49,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:43:49,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:43:49,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:43:49,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:43:49,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:43:49,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:43:49,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:43:49,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:43:49,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:43:49,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:43:49,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:43:49,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:43:49,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:43:49,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:43:49,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:43:49,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:43:49,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:43:49,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:43:49,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:43:49,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:43:49,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:43:49,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:43:49,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:43:49,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:43:49,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:43:49,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:43:49,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:43:50,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:43:50,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:43:50,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:43:50,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:43:50,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:43:50,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:43:50,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:43:50,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:43:50,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:43:50,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:43:50,026 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:43:50,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:43:50,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:43:50,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:43:50,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:43:50,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:43:50,027 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:43:50,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:43:50,027 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:43:50,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:43:50,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:43:50,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:43:50,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:43:50,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:43:50,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:43:50,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:43:50,030 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:43:50,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:43:50,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:43:50,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:43:50,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:43:50,254 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:43:50,256 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:43:50,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-01 12:43:51,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:43:51,428 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:43:51,428 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-01 12:43:51,446 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc9b244b/332f88e89cdc438dbb78c7ff4c901bee/FLAG35f962505 [2023-04-01 12:43:51,455 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc9b244b/332f88e89cdc438dbb78c7ff4c901bee [2023-04-01 12:43:51,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:43:51,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:43:51,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:43:51,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:43:51,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:43:51,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:43:51" (1/1) ... [2023-04-01 12:43:51,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd71a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:51, skipping insertion in model container [2023-04-01 12:43:51,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:43:51" (1/1) ... [2023-04-01 12:43:51,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:43:51,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:43:51,756 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[9421,9434] [2023-04-01 12:43:51,791 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[12913,12926] [2023-04-01 12:43:51,799 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[14069,14082] [2023-04-01 12:43:51,802 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[14725,14738] [2023-04-01 12:43:51,816 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[16246,16259] [2023-04-01 12:43:51,823 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[16902,16915] [2023-04-01 12:43:51,835 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[17886,17899] [2023-04-01 12:43:51,846 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[20224,20237] [2023-04-01 12:43:51,849 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[20883,20896] [2023-04-01 12:43:51,854 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[21907,21920] [2023-04-01 12:43:51,864 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23782,23795] [2023-04-01 12:43:51,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:43:51,936 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:43:51,983 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[9421,9434] [2023-04-01 12:43:51,991 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[12913,12926] [2023-04-01 12:43:51,994 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[14069,14082] [2023-04-01 12:43:51,998 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[14725,14738] [2023-04-01 12:43:52,001 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[16246,16259] [2023-04-01 12:43:52,003 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[16902,16915] [2023-04-01 12:43:52,013 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[17886,17899] [2023-04-01 12:43:52,018 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[20224,20237] [2023-04-01 12:43:52,020 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[20883,20896] [2023-04-01 12:43:52,022 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[21907,21920] [2023-04-01 12:43:52,026 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_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23782,23795] [2023-04-01 12:43:52,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:43:52,079 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:43:52,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52 WrapperNode [2023-04-01 12:43:52,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:43:52,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:43:52,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:43:52,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:43:52,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:43:52,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:43:52,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:43:52,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:43:52,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (1/1) ... [2023-04-01 12:43:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:43:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:43:52,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:43:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:43:52,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:43:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:43:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:43:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:43:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:43:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:43:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:43:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:43:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:43:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:43:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:43:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:43:52,426 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:43:52,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:43:53,209 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:43:53,278 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:43:53,279 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:43:53,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:43:53 BoogieIcfgContainer [2023-04-01 12:43:53,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:43:53,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:43:53,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:43:53,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:43:53,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:43:51" (1/3) ... [2023-04-01 12:43:53,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572d7754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:43:53, skipping insertion in model container [2023-04-01 12:43:53,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:52" (2/3) ... [2023-04-01 12:43:53,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572d7754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:43:53, skipping insertion in model container [2023-04-01 12:43:53,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:43:53" (3/3) ... [2023-04-01 12:43:53,288 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-04-01 12:43:53,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:43:53,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-04-01 12:43:53,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:43:53,348 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;@550910a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:43:53,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-04-01 12:43:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 329 states have (on average 1.8419452887537995) internal successors, (606), 341 states have internal predecessors, (606), 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) [2023-04-01 12:43:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:43:53,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:53,365 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] [2023-04-01 12:43:53,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:53,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -816194671, now seen corresponding path program 1 times [2023-04-01 12:43:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478308291] [2023-04-01 12:43:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:53,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478308291] [2023-04-01 12:43:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478308291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:53,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:53,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:43:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241373237] [2023-04-01 12:43:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:53,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:43:53,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:43:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:43:53,923 INFO L87 Difference]: Start difference. First operand has 346 states, 329 states have (on average 1.8419452887537995) internal successors, (606), 341 states have internal predecessors, (606), 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 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-04-01 12:43:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:54,203 INFO L93 Difference]: Finished difference Result 545 states and 921 transitions. [2023-04-01 12:43:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:43:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) Word has length 62 [2023-04-01 12:43:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:54,212 INFO L225 Difference]: With dead ends: 545 [2023-04-01 12:43:54,212 INFO L226 Difference]: Without dead ends: 283 [2023-04-01 12:43:54,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:43:54,218 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1366 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:54,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 365 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:43:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-04-01 12:43:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2023-04-01 12:43:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 269 states have (on average 1.2602230483271375) internal successors, (339), 279 states have internal predecessors, (339), 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) [2023-04-01 12:43:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2023-04-01 12:43:54,279 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 62 [2023-04-01 12:43:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:54,279 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2023-04-01 12:43:54,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-04-01 12:43:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2023-04-01 12:43:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:43:54,287 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:54,287 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] [2023-04-01 12:43:54,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:43:54,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:54,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 734530853, now seen corresponding path program 1 times [2023-04-01 12:43:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:54,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394810532] [2023-04-01 12:43:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:54,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394810532] [2023-04-01 12:43:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394810532] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:54,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:54,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:43:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596872160] [2023-04-01 12:43:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:54,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:43:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:43:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:43:54,490 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-04-01 12:43:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:54,649 INFO L93 Difference]: Finished difference Result 469 states and 580 transitions. [2023-04-01 12:43:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:43:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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) Word has length 63 [2023-04-01 12:43:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:54,652 INFO L225 Difference]: With dead ends: 469 [2023-04-01 12:43:54,652 INFO L226 Difference]: Without dead ends: 257 [2023-04-01 12:43:54,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:43:54,656 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 862 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:54,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 199 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:43:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-04-01 12:43:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-04-01 12:43:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 253 states have internal predecessors, (308), 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) [2023-04-01 12:43:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 311 transitions. [2023-04-01 12:43:54,674 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 311 transitions. Word has length 63 [2023-04-01 12:43:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:54,675 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 311 transitions. [2023-04-01 12:43:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-04-01 12:43:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 311 transitions. [2023-04-01 12:43:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 12:43:54,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:54,676 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] [2023-04-01 12:43:54,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:43:54,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:54,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1307009359, now seen corresponding path program 1 times [2023-04-01 12:43:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:54,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788904510] [2023-04-01 12:43:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:54,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:54,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788904510] [2023-04-01 12:43:54,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788904510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:54,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:54,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:43:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138297943] [2023-04-01 12:43:54,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:43:54,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:43:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:43:54,834 INFO L87 Difference]: Start difference. First operand 257 states and 311 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-04-01 12:43:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:55,012 INFO L93 Difference]: Finished difference Result 443 states and 548 transitions. [2023-04-01 12:43:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:43:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) Word has length 64 [2023-04-01 12:43:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:55,014 INFO L225 Difference]: With dead ends: 443 [2023-04-01 12:43:55,014 INFO L226 Difference]: Without dead ends: 247 [2023-04-01 12:43:55,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:43:55,015 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 808 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:55,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 185 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:43:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-04-01 12:43:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2023-04-01 12:43:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 233 states have (on average 1.2660944206008584) internal successors, (295), 243 states have internal predecessors, (295), 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) [2023-04-01 12:43:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2023-04-01 12:43:55,029 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 64 [2023-04-01 12:43:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:55,029 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2023-04-01 12:43:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-04-01 12:43:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2023-04-01 12:43:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 12:43:55,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:55,030 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] [2023-04-01 12:43:55,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:43:55,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:55,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash 171042179, now seen corresponding path program 1 times [2023-04-01 12:43:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439359128] [2023-04-01 12:43:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:55,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:55,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439359128] [2023-04-01 12:43:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439359128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:55,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:43:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522183331] [2023-04-01 12:43:55,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:55,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:43:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:43:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:43:55,127 INFO L87 Difference]: Start difference. First operand 247 states and 298 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-04-01 12:43:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:55,292 INFO L93 Difference]: Finished difference Result 550 states and 679 transitions. [2023-04-01 12:43:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:43:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) Word has length 65 [2023-04-01 12:43:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:55,294 INFO L225 Difference]: With dead ends: 550 [2023-04-01 12:43:55,294 INFO L226 Difference]: Without dead ends: 350 [2023-04-01 12:43:55,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:43:55,296 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1038 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:55,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 270 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:43:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-04-01 12:43:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 308. [2023-04-01 12:43:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.3129251700680271) internal successors, (386), 304 states have internal predecessors, (386), 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) [2023-04-01 12:43:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 389 transitions. [2023-04-01 12:43:55,317 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 389 transitions. Word has length 65 [2023-04-01 12:43:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:55,318 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 389 transitions. [2023-04-01 12:43:55,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2023-04-01 12:43:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 389 transitions. [2023-04-01 12:43:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:43:55,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:55,319 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] [2023-04-01 12:43:55,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:43:55,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:55,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash -256043027, now seen corresponding path program 1 times [2023-04-01 12:43:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:55,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69941190] [2023-04-01 12:43:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:55,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69941190] [2023-04-01 12:43:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69941190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:55,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:43:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526889387] [2023-04-01 12:43:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:55,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:43:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:43:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:43:55,664 INFO L87 Difference]: Start difference. First operand 308 states and 389 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 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) [2023-04-01 12:43:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:55,955 INFO L93 Difference]: Finished difference Result 590 states and 730 transitions. [2023-04-01 12:43:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:43:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 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) Word has length 66 [2023-04-01 12:43:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:55,958 INFO L225 Difference]: With dead ends: 590 [2023-04-01 12:43:55,958 INFO L226 Difference]: Without dead ends: 439 [2023-04-01 12:43:55,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:43:55,960 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1640 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:55,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 400 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:43:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-04-01 12:43:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 308. [2023-04-01 12:43:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.3095238095238095) internal successors, (385), 304 states have internal predecessors, (385), 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) [2023-04-01 12:43:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 388 transitions. [2023-04-01 12:43:55,986 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 388 transitions. Word has length 66 [2023-04-01 12:43:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:55,988 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 388 transitions. [2023-04-01 12:43:55,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 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) [2023-04-01 12:43:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 388 transitions. [2023-04-01 12:43:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:43:55,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:55,988 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] [2023-04-01 12:43:55,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:43:55,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:55,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1941491359, now seen corresponding path program 1 times [2023-04-01 12:43:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:55,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051355872] [2023-04-01 12:43:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:56,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051355872] [2023-04-01 12:43:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051355872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:56,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:56,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:43:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388761403] [2023-04-01 12:43:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:56,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:43:56,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:43:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:43:56,218 INFO L87 Difference]: Start difference. First operand 308 states and 388 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-04-01 12:43:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:56,665 INFO L93 Difference]: Finished difference Result 618 states and 779 transitions. [2023-04-01 12:43:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:43:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) Word has length 66 [2023-04-01 12:43:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:56,668 INFO L225 Difference]: With dead ends: 618 [2023-04-01 12:43:56,669 INFO L226 Difference]: Without dead ends: 613 [2023-04-01 12:43:56,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:43:56,670 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 830 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:56,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 788 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:43:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-04-01 12:43:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 308. [2023-04-01 12:43:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.3061224489795917) internal successors, (384), 304 states have internal predecessors, (384), 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) [2023-04-01 12:43:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 387 transitions. [2023-04-01 12:43:56,706 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 387 transitions. Word has length 66 [2023-04-01 12:43:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:56,706 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 387 transitions. [2023-04-01 12:43:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-04-01 12:43:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 387 transitions. [2023-04-01 12:43:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:43:56,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:56,707 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] [2023-04-01 12:43:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:43:56,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:56,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1497535239, now seen corresponding path program 1 times [2023-04-01 12:43:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156363249] [2023-04-01 12:43:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:56,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156363249] [2023-04-01 12:43:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156363249] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:56,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:56,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:43:56,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593090052] [2023-04-01 12:43:56,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:56,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:43:56,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:43:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:43:56,984 INFO L87 Difference]: Start difference. First operand 308 states and 387 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-04-01 12:43:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:57,402 INFO L93 Difference]: Finished difference Result 494 states and 628 transitions. [2023-04-01 12:43:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:43:57,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) Word has length 66 [2023-04-01 12:43:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:57,404 INFO L225 Difference]: With dead ends: 494 [2023-04-01 12:43:57,404 INFO L226 Difference]: Without dead ends: 388 [2023-04-01 12:43:57,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:43:57,405 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 1343 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:57,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 687 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:43:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-04-01 12:43:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 308. [2023-04-01 12:43:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.3027210884353742) internal successors, (383), 304 states have internal predecessors, (383), 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) [2023-04-01 12:43:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 386 transitions. [2023-04-01 12:43:57,441 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 386 transitions. Word has length 66 [2023-04-01 12:43:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:57,441 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 386 transitions. [2023-04-01 12:43:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-04-01 12:43:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 386 transitions. [2023-04-01 12:43:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:43:57,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:57,442 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] [2023-04-01 12:43:57,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:43:57,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:57,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2113598979, now seen corresponding path program 1 times [2023-04-01 12:43:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:57,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939729717] [2023-04-01 12:43:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:57,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939729717] [2023-04-01 12:43:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939729717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:57,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:43:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814413822] [2023-04-01 12:43:57,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:43:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:43:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:43:57,667 INFO L87 Difference]: Start difference. First operand 308 states and 386 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:58,157 INFO L93 Difference]: Finished difference Result 717 states and 917 transitions. [2023-04-01 12:43:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:43:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:43:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:58,159 INFO L225 Difference]: With dead ends: 717 [2023-04-01 12:43:58,159 INFO L226 Difference]: Without dead ends: 633 [2023-04-01 12:43:58,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:43:58,160 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1590 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:58,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1590 Valid, 836 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:43:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-04-01 12:43:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 308. [2023-04-01 12:43:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.2993197278911566) internal successors, (382), 304 states have internal predecessors, (382), 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) [2023-04-01 12:43:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 385 transitions. [2023-04-01 12:43:58,188 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 385 transitions. Word has length 68 [2023-04-01 12:43:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:58,188 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 385 transitions. [2023-04-01 12:43:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 385 transitions. [2023-04-01 12:43:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:43:58,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:58,189 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] [2023-04-01 12:43:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:43:58,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:58,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1375985747, now seen corresponding path program 1 times [2023-04-01 12:43:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287914132] [2023-04-01 12:43:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:58,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287914132] [2023-04-01 12:43:58,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287914132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:58,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:43:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908153707] [2023-04-01 12:43:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:43:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:43:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:43:58,365 INFO L87 Difference]: Start difference. First operand 308 states and 385 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:58,844 INFO L93 Difference]: Finished difference Result 687 states and 869 transitions. [2023-04-01 12:43:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:43:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:43:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:58,846 INFO L225 Difference]: With dead ends: 687 [2023-04-01 12:43:58,846 INFO L226 Difference]: Without dead ends: 613 [2023-04-01 12:43:58,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:43:58,848 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1163 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:58,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 789 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:43:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-04-01 12:43:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 308. [2023-04-01 12:43:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.2959183673469388) internal successors, (381), 304 states have internal predecessors, (381), 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) [2023-04-01 12:43:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 384 transitions. [2023-04-01 12:43:58,878 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 384 transitions. Word has length 68 [2023-04-01 12:43:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:58,878 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 384 transitions. [2023-04-01 12:43:58,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 384 transitions. [2023-04-01 12:43:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:43:58,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:58,879 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] [2023-04-01 12:43:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:43:58,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:58,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1487721511, now seen corresponding path program 1 times [2023-04-01 12:43:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376664443] [2023-04-01 12:43:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:43:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:43:59,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:43:59,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376664443] [2023-04-01 12:43:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376664443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:43:59,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:43:59,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:43:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848881774] [2023-04-01 12:43:59,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:43:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:43:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:43:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:43:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:43:59,145 INFO L87 Difference]: Start difference. First operand 308 states and 384 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:43:59,646 INFO L93 Difference]: Finished difference Result 690 states and 871 transitions. [2023-04-01 12:43:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:43:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:43:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:43:59,648 INFO L225 Difference]: With dead ends: 690 [2023-04-01 12:43:59,648 INFO L226 Difference]: Without dead ends: 613 [2023-04-01 12:43:59,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:43:59,649 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1513 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:43:59,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 840 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:43:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-04-01 12:43:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 308. [2023-04-01 12:43:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.2925170068027212) internal successors, (380), 304 states have internal predecessors, (380), 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) [2023-04-01 12:43:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 383 transitions. [2023-04-01 12:43:59,683 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 383 transitions. Word has length 68 [2023-04-01 12:43:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:43:59,683 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 383 transitions. [2023-04-01 12:43:59,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:43:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 383 transitions. [2023-04-01 12:43:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:43:59,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:43:59,684 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] [2023-04-01 12:43:59,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:43:59,684 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr8ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:43:59,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:43:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 441435001, now seen corresponding path program 1 times [2023-04-01 12:43:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:43:59,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741939105] [2023-04-01 12:43:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:43:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:43:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:00,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:00,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741939105] [2023-04-01 12:44:00,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741939105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:00,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:00,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:00,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038853142] [2023-04-01 12:44:00,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:00,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:00,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:00,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:00,045 INFO L87 Difference]: Start difference. First operand 308 states and 383 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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) [2023-04-01 12:44:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:01,351 INFO L93 Difference]: Finished difference Result 1060 states and 1361 transitions. [2023-04-01 12:44:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 12:44:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:44:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:01,355 INFO L225 Difference]: With dead ends: 1060 [2023-04-01 12:44:01,355 INFO L226 Difference]: Without dead ends: 971 [2023-04-01 12:44:01,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 12:44:01,357 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 2473 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2473 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:01,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2473 Valid, 1331 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:44:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-04-01 12:44:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 312. [2023-04-01 12:44:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 298 states have (on average 1.2885906040268456) internal successors, (384), 308 states have internal predecessors, (384), 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) [2023-04-01 12:44:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 387 transitions. [2023-04-01 12:44:01,429 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 387 transitions. Word has length 68 [2023-04-01 12:44:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:01,429 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 387 transitions. [2023-04-01 12:44:01,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 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) [2023-04-01 12:44:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 387 transitions. [2023-04-01 12:44:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:44:01,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:01,430 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] [2023-04-01 12:44:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:44:01,430 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:01,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1658936636, now seen corresponding path program 1 times [2023-04-01 12:44:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:01,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647209611] [2023-04-01 12:44:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:01,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:01,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647209611] [2023-04-01 12:44:01,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647209611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:01,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:01,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68253531] [2023-04-01 12:44:01,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:01,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:01,648 INFO L87 Difference]: Start difference. First operand 312 states and 387 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:44:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:02,242 INFO L93 Difference]: Finished difference Result 622 states and 777 transitions. [2023-04-01 12:44:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:44:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:44:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:02,259 INFO L225 Difference]: With dead ends: 622 [2023-04-01 12:44:02,259 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 12:44:02,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:44:02,260 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1509 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:02,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1509 Valid, 841 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:44:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 12:44:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 312. [2023-04-01 12:44:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 298 states have (on average 1.2818791946308725) internal successors, (382), 308 states have internal predecessors, (382), 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) [2023-04-01 12:44:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 385 transitions. [2023-04-01 12:44:02,317 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 385 transitions. Word has length 68 [2023-04-01 12:44:02,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:02,317 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 385 transitions. [2023-04-01 12:44:02,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:44:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 385 transitions. [2023-04-01 12:44:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:44:02,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:02,318 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] [2023-04-01 12:44:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:44:02,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:02,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2043984797, now seen corresponding path program 1 times [2023-04-01 12:44:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:02,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385370588] [2023-04-01 12:44:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:02,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:02,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385370588] [2023-04-01 12:44:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385370588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240983106] [2023-04-01 12:44:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:02,513 INFO L87 Difference]: Start difference. First operand 312 states and 385 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:44:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:03,165 INFO L93 Difference]: Finished difference Result 650 states and 819 transitions. [2023-04-01 12:44:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:44:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:44:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:03,167 INFO L225 Difference]: With dead ends: 650 [2023-04-01 12:44:03,167 INFO L226 Difference]: Without dead ends: 633 [2023-04-01 12:44:03,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:44:03,168 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1505 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:03,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 893 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:44:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-04-01 12:44:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 312. [2023-04-01 12:44:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 298 states have (on average 1.2751677852348993) internal successors, (380), 308 states have internal predecessors, (380), 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) [2023-04-01 12:44:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 383 transitions. [2023-04-01 12:44:03,216 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 383 transitions. Word has length 68 [2023-04-01 12:44:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:03,216 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 383 transitions. [2023-04-01 12:44:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 states have internal predecessors, (65), 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) [2023-04-01 12:44:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 383 transitions. [2023-04-01 12:44:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:44:03,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:03,217 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] [2023-04-01 12:44:03,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:44:03,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:03,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1391190413, now seen corresponding path program 1 times [2023-04-01 12:44:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:03,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723530546] [2023-04-01 12:44:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:03,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:03,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723530546] [2023-04-01 12:44:03,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723530546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:03,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:03,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:44:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488292859] [2023-04-01 12:44:03,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:44:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:44:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:44:03,597 INFO L87 Difference]: Start difference. First operand 312 states and 383 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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) [2023-04-01 12:44:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:04,309 INFO L93 Difference]: Finished difference Result 566 states and 713 transitions. [2023-04-01 12:44:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 12:44:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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) Word has length 68 [2023-04-01 12:44:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:04,310 INFO L225 Difference]: With dead ends: 566 [2023-04-01 12:44:04,310 INFO L226 Difference]: Without dead ends: 430 [2023-04-01 12:44:04,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2023-04-01 12:44:04,311 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1410 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:04,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 985 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:44:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-04-01 12:44:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 312. [2023-04-01 12:44:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 298 states have (on average 1.2684563758389262) internal successors, (378), 308 states have internal predecessors, (378), 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) [2023-04-01 12:44:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 381 transitions. [2023-04-01 12:44:04,361 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 381 transitions. Word has length 68 [2023-04-01 12:44:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:04,362 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 381 transitions. [2023-04-01 12:44:04,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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) [2023-04-01 12:44:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 381 transitions. [2023-04-01 12:44:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:44:04,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:04,362 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] [2023-04-01 12:44:04,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:44:04,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:04,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 694372954, now seen corresponding path program 1 times [2023-04-01 12:44:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849694139] [2023-04-01 12:44:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:04,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:04,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849694139] [2023-04-01 12:44:04,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849694139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:04,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:04,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865498787] [2023-04-01 12:44:04,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:04,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:04,587 INFO L87 Difference]: Start difference. First operand 312 states and 381 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 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) [2023-04-01 12:44:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:05,154 INFO L93 Difference]: Finished difference Result 722 states and 912 transitions. [2023-04-01 12:44:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:44:05,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 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) Word has length 69 [2023-04-01 12:44:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:05,156 INFO L225 Difference]: With dead ends: 722 [2023-04-01 12:44:05,156 INFO L226 Difference]: Without dead ends: 633 [2023-04-01 12:44:05,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:44:05,157 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 699 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:05,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1055 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:44:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-04-01 12:44:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 308. [2023-04-01 12:44:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 294 states have (on average 1.2687074829931972) internal successors, (373), 304 states have internal predecessors, (373), 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) [2023-04-01 12:44:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 376 transitions. [2023-04-01 12:44:05,223 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 376 transitions. Word has length 69 [2023-04-01 12:44:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:05,223 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 376 transitions. [2023-04-01 12:44:05,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 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) [2023-04-01 12:44:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 376 transitions. [2023-04-01 12:44:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:44:05,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:05,224 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] [2023-04-01 12:44:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:44:05,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:05,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1112484223, now seen corresponding path program 1 times [2023-04-01 12:44:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760222463] [2023-04-01 12:44:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:05,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:05,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760222463] [2023-04-01 12:44:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760222463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:05,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028398398] [2023-04-01 12:44:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:05,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:05,661 INFO L87 Difference]: Start difference. First operand 308 states and 376 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:06,514 INFO L93 Difference]: Finished difference Result 854 states and 1090 transitions. [2023-04-01 12:44:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:44:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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 70 [2023-04-01 12:44:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:06,517 INFO L225 Difference]: With dead ends: 854 [2023-04-01 12:44:06,517 INFO L226 Difference]: Without dead ends: 775 [2023-04-01 12:44:06,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:44:06,518 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1236 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:06,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 2110 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-04-01 12:44:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 301. [2023-04-01 12:44:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 287 states have (on average 1.264808362369338) internal successors, (363), 297 states have internal predecessors, (363), 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) [2023-04-01 12:44:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 366 transitions. [2023-04-01 12:44:06,584 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 366 transitions. Word has length 70 [2023-04-01 12:44:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 366 transitions. [2023-04-01 12:44:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 366 transitions. [2023-04-01 12:44:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:44:06,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:06,585 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] [2023-04-01 12:44:06,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:44:06,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:06,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:06,585 INFO L85 PathProgramCache]: Analyzing trace with hash 756705776, now seen corresponding path program 1 times [2023-04-01 12:44:06,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:06,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320777386] [2023-04-01 12:44:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:06,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:07,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320777386] [2023-04-01 12:44:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320777386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776124652] [2023-04-01 12:44:07,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:07,003 INFO L87 Difference]: Start difference. First operand 301 states and 366 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:07,640 INFO L93 Difference]: Finished difference Result 556 states and 697 transitions. [2023-04-01 12:44:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:44:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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 70 [2023-04-01 12:44:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:07,641 INFO L225 Difference]: With dead ends: 556 [2023-04-01 12:44:07,641 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 12:44:07,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:44:07,642 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1036 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:07,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1856 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 12:44:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 284. [2023-04-01 12:44:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 271 states have (on average 1.2656826568265682) internal successors, (343), 280 states have internal predecessors, (343), 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) [2023-04-01 12:44:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 346 transitions. [2023-04-01 12:44:07,712 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 346 transitions. Word has length 70 [2023-04-01 12:44:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:07,712 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 346 transitions. [2023-04-01 12:44:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 346 transitions. [2023-04-01 12:44:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:44:07,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:07,713 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] [2023-04-01 12:44:07,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:44:07,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:07,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash -451815971, now seen corresponding path program 1 times [2023-04-01 12:44:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:07,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007010493] [2023-04-01 12:44:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:08,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007010493] [2023-04-01 12:44:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007010493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:08,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:44:08,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786931540] [2023-04-01 12:44:08,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:08,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:44:08,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:44:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:44:08,027 INFO L87 Difference]: Start difference. First operand 284 states and 346 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 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) [2023-04-01 12:44:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:08,588 INFO L93 Difference]: Finished difference Result 600 states and 725 transitions. [2023-04-01 12:44:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:44:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 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 70 [2023-04-01 12:44:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:08,590 INFO L225 Difference]: With dead ends: 600 [2023-04-01 12:44:08,590 INFO L226 Difference]: Without dead ends: 489 [2023-04-01 12:44:08,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:44:08,591 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1259 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:08,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1059 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-04-01 12:44:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 245. [2023-04-01 12:44:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 235 states have (on average 1.2595744680851064) internal successors, (296), 241 states have internal predecessors, (296), 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) [2023-04-01 12:44:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 299 transitions. [2023-04-01 12:44:08,667 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 299 transitions. Word has length 70 [2023-04-01 12:44:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:08,667 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 299 transitions. [2023-04-01 12:44:08,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 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) [2023-04-01 12:44:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 299 transitions. [2023-04-01 12:44:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:44:08,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:08,668 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] [2023-04-01 12:44:08,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:44:08,668 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:08,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:08,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1825394408, now seen corresponding path program 1 times [2023-04-01 12:44:08,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:08,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068023104] [2023-04-01 12:44:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:08,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:09,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068023104] [2023-04-01 12:44:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068023104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:09,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:44:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95385690] [2023-04-01 12:44:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:09,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:44:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:44:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:44:09,286 INFO L87 Difference]: Start difference. First operand 245 states and 299 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 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) [2023-04-01 12:44:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:10,453 INFO L93 Difference]: Finished difference Result 570 states and 696 transitions. [2023-04-01 12:44:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:44:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 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 70 [2023-04-01 12:44:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:10,455 INFO L225 Difference]: With dead ends: 570 [2023-04-01 12:44:10,456 INFO L226 Difference]: Without dead ends: 494 [2023-04-01 12:44:10,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-04-01 12:44:10,457 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1694 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:10,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 1708 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:44:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-04-01 12:44:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 243. [2023-04-01 12:44:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 233 states have (on average 1.2532188841201717) internal successors, (292), 239 states have internal predecessors, (292), 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) [2023-04-01 12:44:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 295 transitions. [2023-04-01 12:44:10,536 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 295 transitions. Word has length 70 [2023-04-01 12:44:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:10,536 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 295 transitions. [2023-04-01 12:44:10,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 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) [2023-04-01 12:44:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 295 transitions. [2023-04-01 12:44:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:44:10,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:10,537 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] [2023-04-01 12:44:10,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:44:10,537 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:10,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1804117824, now seen corresponding path program 1 times [2023-04-01 12:44:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413219788] [2023-04-01 12:44:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:10,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413219788] [2023-04-01 12:44:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413219788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:10,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:10,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608212548] [2023-04-01 12:44:10,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:10,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:10,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:10,905 INFO L87 Difference]: Start difference. First operand 243 states and 295 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:11,529 INFO L93 Difference]: Finished difference Result 451 states and 566 transitions. [2023-04-01 12:44:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:44:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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 70 [2023-04-01 12:44:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:11,531 INFO L225 Difference]: With dead ends: 451 [2023-04-01 12:44:11,531 INFO L226 Difference]: Without dead ends: 337 [2023-04-01 12:44:11,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:44:11,532 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 585 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:11,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1373 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-04-01 12:44:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 201. [2023-04-01 12:44:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.2371134020618557) internal successors, (240), 197 states have internal predecessors, (240), 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) [2023-04-01 12:44:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 243 transitions. [2023-04-01 12:44:11,607 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 243 transitions. Word has length 70 [2023-04-01 12:44:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:11,607 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 243 transitions. [2023-04-01 12:44:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2023-04-01 12:44:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 243 transitions. [2023-04-01 12:44:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:44:11,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:11,608 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] [2023-04-01 12:44:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:44:11,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:11,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -910201758, now seen corresponding path program 1 times [2023-04-01 12:44:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555724526] [2023-04-01 12:44:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:11,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555724526] [2023-04-01 12:44:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555724526] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:11,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:11,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719976748] [2023-04-01 12:44:11,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:11,949 INFO L87 Difference]: Start difference. First operand 201 states and 243 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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) [2023-04-01 12:44:12,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:12,446 INFO L93 Difference]: Finished difference Result 350 states and 432 transitions. [2023-04-01 12:44:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:44:12,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 71 [2023-04-01 12:44:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:12,447 INFO L225 Difference]: With dead ends: 350 [2023-04-01 12:44:12,447 INFO L226 Difference]: Without dead ends: 309 [2023-04-01 12:44:12,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:44:12,448 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 650 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:12,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 894 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-04-01 12:44:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 193. [2023-04-01 12:44:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.2245989304812834) internal successors, (229), 189 states have internal predecessors, (229), 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) [2023-04-01 12:44:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2023-04-01 12:44:12,537 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 71 [2023-04-01 12:44:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:12,537 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2023-04-01 12:44:12,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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) [2023-04-01 12:44:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2023-04-01 12:44:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:44:12,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:12,538 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] [2023-04-01 12:44:12,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 12:44:12,538 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:12,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash -301479695, now seen corresponding path program 1 times [2023-04-01 12:44:12,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:12,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687569842] [2023-04-01 12:44:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:12,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:12,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687569842] [2023-04-01 12:44:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687569842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:12,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:12,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728578200] [2023-04-01 12:44:12,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:12,710 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-04-01 12:44:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:13,082 INFO L93 Difference]: Finished difference Result 308 states and 375 transitions. [2023-04-01 12:44:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:44:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) Word has length 71 [2023-04-01 12:44:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:13,084 INFO L225 Difference]: With dead ends: 308 [2023-04-01 12:44:13,084 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 12:44:13,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2023-04-01 12:44:13,085 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 525 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:13,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 417 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 12:44:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 193. [2023-04-01 12:44:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.2192513368983957) internal successors, (228), 189 states have internal predecessors, (228), 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) [2023-04-01 12:44:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 231 transitions. [2023-04-01 12:44:13,174 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 231 transitions. Word has length 71 [2023-04-01 12:44:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:13,174 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 231 transitions. [2023-04-01 12:44:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-04-01 12:44:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 231 transitions. [2023-04-01 12:44:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:44:13,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:13,175 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] [2023-04-01 12:44:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 12:44:13,175 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:13,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1793312214, now seen corresponding path program 1 times [2023-04-01 12:44:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:13,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145411594] [2023-04-01 12:44:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:13,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:13,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145411594] [2023-04-01 12:44:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145411594] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:13,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:13,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961213053] [2023-04-01 12:44:13,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:13,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:13,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:13,371 INFO L87 Difference]: Start difference. First operand 193 states and 231 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-04-01 12:44:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:13,825 INFO L93 Difference]: Finished difference Result 427 states and 529 transitions. [2023-04-01 12:44:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:44:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) Word has length 71 [2023-04-01 12:44:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:13,826 INFO L225 Difference]: With dead ends: 427 [2023-04-01 12:44:13,826 INFO L226 Difference]: Without dead ends: 325 [2023-04-01 12:44:13,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:44:13,827 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 538 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:13,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 570 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-01 12:44:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 193. [2023-04-01 12:44:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 189 states have internal predecessors, (226), 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) [2023-04-01 12:44:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2023-04-01 12:44:13,917 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 71 [2023-04-01 12:44:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:13,917 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2023-04-01 12:44:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2023-04-01 12:44:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2023-04-01 12:44:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 12:44:13,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:13,918 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] [2023-04-01 12:44:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 12:44:13,918 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:13,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1284916264, now seen corresponding path program 1 times [2023-04-01 12:44:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924891987] [2023-04-01 12:44:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:14,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:14,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924891987] [2023-04-01 12:44:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924891987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:14,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:14,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:44:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094444638] [2023-04-01 12:44:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:44:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:44:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:44:14,754 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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) [2023-04-01 12:44:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:16,275 INFO L93 Difference]: Finished difference Result 373 states and 461 transitions. [2023-04-01 12:44:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 12:44:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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 73 [2023-04-01 12:44:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:16,277 INFO L225 Difference]: With dead ends: 373 [2023-04-01 12:44:16,277 INFO L226 Difference]: Without dead ends: 367 [2023-04-01 12:44:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 12:44:16,278 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 696 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:16,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 2216 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:44:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-04-01 12:44:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 204. [2023-04-01 12:44:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.2121212121212122) internal successors, (240), 200 states have internal predecessors, (240), 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) [2023-04-01 12:44:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 243 transitions. [2023-04-01 12:44:16,376 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 243 transitions. Word has length 73 [2023-04-01 12:44:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 243 transitions. [2023-04-01 12:44:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 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) [2023-04-01 12:44:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 243 transitions. [2023-04-01 12:44:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 12:44:16,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:16,377 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] [2023-04-01 12:44:16,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-01 12:44:16,377 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:16,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash -279894712, now seen corresponding path program 1 times [2023-04-01 12:44:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:16,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755389063] [2023-04-01 12:44:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:17,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755389063] [2023-04-01 12:44:17,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755389063] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:17,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:17,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 12:44:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454244656] [2023-04-01 12:44:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:17,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 12:44:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 12:44:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:44:17,004 INFO L87 Difference]: Start difference. First operand 204 states and 243 transitions. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 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) [2023-04-01 12:44:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:17,947 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2023-04-01 12:44:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 12:44:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 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 73 [2023-04-01 12:44:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:17,948 INFO L225 Difference]: With dead ends: 228 [2023-04-01 12:44:17,948 INFO L226 Difference]: Without dead ends: 220 [2023-04-01 12:44:17,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 12:44:17,949 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 366 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:17,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1557 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:44:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-04-01 12:44:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2023-04-01 12:44:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.2128712871287128) internal successors, (245), 204 states have internal predecessors, (245), 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) [2023-04-01 12:44:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2023-04-01 12:44:18,075 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 73 [2023-04-01 12:44:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:18,075 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2023-04-01 12:44:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 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) [2023-04-01 12:44:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2023-04-01 12:44:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 12:44:18,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:18,093 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] [2023-04-01 12:44:18,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-01 12:44:18,094 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:18,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2143976558, now seen corresponding path program 1 times [2023-04-01 12:44:18,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:18,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255392505] [2023-04-01 12:44:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:18,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:18,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:18,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255392505] [2023-04-01 12:44:18,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255392505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:18,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:18,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:44:18,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547387951] [2023-04-01 12:44:18,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:18,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:44:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:18,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:44:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:44:18,694 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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) [2023-04-01 12:44:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:20,583 INFO L93 Difference]: Finished difference Result 765 states and 964 transitions. [2023-04-01 12:44:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 12:44:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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 74 [2023-04-01 12:44:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:20,592 INFO L225 Difference]: With dead ends: 765 [2023-04-01 12:44:20,592 INFO L226 Difference]: Without dead ends: 759 [2023-04-01 12:44:20,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2023-04-01 12:44:20,593 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1061 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2889 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:20,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 2889 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:44:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-04-01 12:44:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 208. [2023-04-01 12:44:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.2079207920792079) internal successors, (244), 204 states have internal predecessors, (244), 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) [2023-04-01 12:44:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 247 transitions. [2023-04-01 12:44:20,689 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 247 transitions. Word has length 74 [2023-04-01 12:44:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:20,690 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 247 transitions. [2023-04-01 12:44:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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) [2023-04-01 12:44:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 247 transitions. [2023-04-01 12:44:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 12:44:20,690 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:20,690 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] [2023-04-01 12:44:20,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-01 12:44:20,690 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:20,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 579165582, now seen corresponding path program 1 times [2023-04-01 12:44:20,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:20,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622405009] [2023-04-01 12:44:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:21,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622405009] [2023-04-01 12:44:21,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622405009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:21,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:21,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:44:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435283807] [2023-04-01 12:44:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:44:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:44:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:44:21,021 INFO L87 Difference]: Start difference. First operand 208 states and 247 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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) [2023-04-01 12:44:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:21,812 INFO L93 Difference]: Finished difference Result 514 states and 637 transitions. [2023-04-01 12:44:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:44:21,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 74 [2023-04-01 12:44:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:21,814 INFO L225 Difference]: With dead ends: 514 [2023-04-01 12:44:21,814 INFO L226 Difference]: Without dead ends: 499 [2023-04-01 12:44:21,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:44:21,814 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 746 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:21,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1279 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-01 12:44:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 192. [2023-04-01 12:44:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 188 states have internal predecessors, (225), 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) [2023-04-01 12:44:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2023-04-01 12:44:21,922 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 74 [2023-04-01 12:44:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:21,922 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2023-04-01 12:44:21,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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) [2023-04-01 12:44:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2023-04-01 12:44:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 12:44:21,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:21,923 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] [2023-04-01 12:44:21,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-01 12:44:21,923 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:21,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1075935255, now seen corresponding path program 1 times [2023-04-01 12:44:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520287647] [2023-04-01 12:44:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:22,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:22,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520287647] [2023-04-01 12:44:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520287647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:22,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:44:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629553499] [2023-04-01 12:44:22,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:22,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:44:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:44:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:44:22,192 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2023-04-01 12:44:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:22,831 INFO L93 Difference]: Finished difference Result 462 states and 575 transitions. [2023-04-01 12:44:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:44:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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 74 [2023-04-01 12:44:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:22,833 INFO L225 Difference]: With dead ends: 462 [2023-04-01 12:44:22,833 INFO L226 Difference]: Without dead ends: 456 [2023-04-01 12:44:22,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:44:22,834 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 428 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:22,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1045 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-04-01 12:44:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 175. [2023-04-01 12:44:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1988304093567252) internal successors, (205), 171 states have internal predecessors, (205), 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) [2023-04-01 12:44:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2023-04-01 12:44:22,928 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 74 [2023-04-01 12:44:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:22,928 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2023-04-01 12:44:22,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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) [2023-04-01 12:44:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2023-04-01 12:44:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 12:44:22,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:22,929 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] [2023-04-01 12:44:22,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-01 12:44:22,929 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:22,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1314794476, now seen corresponding path program 1 times [2023-04-01 12:44:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:22,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085409087] [2023-04-01 12:44:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:22,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:23,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085409087] [2023-04-01 12:44:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085409087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:23,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453411735] [2023-04-01 12:44:23,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:23,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:23,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:23,021 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-04-01 12:44:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:23,195 INFO L93 Difference]: Finished difference Result 256 states and 315 transitions. [2023-04-01 12:44:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:23,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 88 [2023-04-01 12:44:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:23,196 INFO L225 Difference]: With dead ends: 256 [2023-04-01 12:44:23,196 INFO L226 Difference]: Without dead ends: 219 [2023-04-01 12:44:23,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:23,197 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 56 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:23,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 251 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-01 12:44:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2023-04-01 12:44:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.2146341463414634) internal successors, (249), 205 states have internal predecessors, (249), 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) [2023-04-01 12:44:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 252 transitions. [2023-04-01 12:44:23,325 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 252 transitions. Word has length 88 [2023-04-01 12:44:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:23,325 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 252 transitions. [2023-04-01 12:44:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-04-01 12:44:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 252 transitions. [2023-04-01 12:44:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:44:23,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:23,326 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] [2023-04-01 12:44:23,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-01 12:44:23,326 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:23,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash 270280593, now seen corresponding path program 1 times [2023-04-01 12:44:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231860765] [2023-04-01 12:44:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231860765] [2023-04-01 12:44:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231860765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798947773] [2023-04-01 12:44:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:23,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:23,407 INFO L87 Difference]: Start difference. First operand 209 states and 252 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-04-01 12:44:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:23,659 INFO L93 Difference]: Finished difference Result 415 states and 526 transitions. [2023-04-01 12:44:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 91 [2023-04-01 12:44:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:23,660 INFO L225 Difference]: With dead ends: 415 [2023-04-01 12:44:23,660 INFO L226 Difference]: Without dead ends: 312 [2023-04-01 12:44:23,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:23,661 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 49 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:23,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 251 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-04-01 12:44:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 298. [2023-04-01 12:44:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.248299319727891) internal successors, (367), 294 states have internal predecessors, (367), 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) [2023-04-01 12:44:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 370 transitions. [2023-04-01 12:44:23,884 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 370 transitions. Word has length 91 [2023-04-01 12:44:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:23,884 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 370 transitions. [2023-04-01 12:44:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-04-01 12:44:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 370 transitions. [2023-04-01 12:44:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:44:23,884 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:23,885 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] [2023-04-01 12:44:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-04-01 12:44:23,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:23,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1252072106, now seen corresponding path program 1 times [2023-04-01 12:44:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:23,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940662850] [2023-04-01 12:44:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:23,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:23,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940662850] [2023-04-01 12:44:23,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940662850] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:23,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732793704] [2023-04-01 12:44:23,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:23,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:23,964 INFO L87 Difference]: Start difference. First operand 298 states and 370 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-04-01 12:44:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:24,415 INFO L93 Difference]: Finished difference Result 682 states and 880 transitions. [2023-04-01 12:44:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 94 [2023-04-01 12:44:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:24,417 INFO L225 Difference]: With dead ends: 682 [2023-04-01 12:44:24,417 INFO L226 Difference]: Without dead ends: 490 [2023-04-01 12:44:24,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:24,418 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 42 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:24,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 251 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-04-01 12:44:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 464. [2023-04-01 12:44:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.2717391304347827) internal successors, (585), 460 states have internal predecessors, (585), 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) [2023-04-01 12:44:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 588 transitions. [2023-04-01 12:44:24,811 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 588 transitions. Word has length 94 [2023-04-01 12:44:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:24,812 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 588 transitions. [2023-04-01 12:44:24,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-04-01 12:44:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 588 transitions. [2023-04-01 12:44:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 12:44:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:24,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:24,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-04-01 12:44:24,812 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:24,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 41774716, now seen corresponding path program 1 times [2023-04-01 12:44:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:24,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538126160] [2023-04-01 12:44:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:24,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:24,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:24,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538126160] [2023-04-01 12:44:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538126160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:24,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:24,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:24,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940977192] [2023-04-01 12:44:24,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:24,887 INFO L87 Difference]: Start difference. First operand 464 states and 588 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2023-04-01 12:44:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:25,673 INFO L93 Difference]: Finished difference Result 1180 states and 1534 transitions. [2023-04-01 12:44:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 97 [2023-04-01 12:44:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:25,675 INFO L225 Difference]: With dead ends: 1180 [2023-04-01 12:44:25,675 INFO L226 Difference]: Without dead ends: 822 [2023-04-01 12:44:25,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:25,676 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 32 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:25,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 251 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2023-04-01 12:44:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 772. [2023-04-01 12:44:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 768 states have (on average 1.2825520833333333) internal successors, (985), 768 states have internal predecessors, (985), 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) [2023-04-01 12:44:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 988 transitions. [2023-04-01 12:44:26,399 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 988 transitions. Word has length 97 [2023-04-01 12:44:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:26,399 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 988 transitions. [2023-04-01 12:44:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2023-04-01 12:44:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 988 transitions. [2023-04-01 12:44:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 12:44:26,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:26,400 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] [2023-04-01 12:44:26,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-04-01 12:44:26,400 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:26,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 451717614, now seen corresponding path program 1 times [2023-04-01 12:44:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078017985] [2023-04-01 12:44:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:26,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:26,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078017985] [2023-04-01 12:44:26,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078017985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:26,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:26,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:44:26,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276223730] [2023-04-01 12:44:26,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:26,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:44:26,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:44:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:26,478 INFO L87 Difference]: Start difference. First operand 772 states and 988 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2023-04-01 12:44:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:28,948 INFO L93 Difference]: Finished difference Result 2950 states and 3830 transitions. [2023-04-01 12:44:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:44:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 100 [2023-04-01 12:44:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:28,953 INFO L225 Difference]: With dead ends: 2950 [2023-04-01 12:44:28,954 INFO L226 Difference]: Without dead ends: 2284 [2023-04-01 12:44:28,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:44:28,955 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 534 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:28,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 806 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2023-04-01 12:44:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1150. [2023-04-01 12:44:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1146 states have (on average 1.2731239092495636) internal successors, (1459), 1146 states have internal predecessors, (1459), 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) [2023-04-01 12:44:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1462 transitions. [2023-04-01 12:44:30,136 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1462 transitions. Word has length 100 [2023-04-01 12:44:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:30,136 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1462 transitions. [2023-04-01 12:44:30,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2023-04-01 12:44:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1462 transitions. [2023-04-01 12:44:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 12:44:30,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:30,137 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] [2023-04-01 12:44:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-04-01 12:44:30,137 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:30,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash -124799728, now seen corresponding path program 1 times [2023-04-01 12:44:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:30,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364632043] [2023-04-01 12:44:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:30,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364632043] [2023-04-01 12:44:30,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364632043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:30,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:30,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:44:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537505138] [2023-04-01 12:44:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:44:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:44:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:30,272 INFO L87 Difference]: Start difference. First operand 1150 states and 1462 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2023-04-01 12:44:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:31,556 INFO L93 Difference]: Finished difference Result 2196 states and 2810 transitions. [2023-04-01 12:44:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:44:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 102 [2023-04-01 12:44:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:31,559 INFO L225 Difference]: With dead ends: 2196 [2023-04-01 12:44:31,559 INFO L226 Difference]: Without dead ends: 1152 [2023-04-01 12:44:31,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:44:31,561 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 72 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:31,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-04-01 12:44:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2023-04-01 12:44:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1146 states have (on average 1.2713787085514834) internal successors, (1457), 1146 states have internal predecessors, (1457), 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) [2023-04-01 12:44:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1460 transitions. [2023-04-01 12:44:32,778 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1460 transitions. Word has length 102 [2023-04-01 12:44:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:32,778 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1460 transitions. [2023-04-01 12:44:32,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2023-04-01 12:44:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1460 transitions. [2023-04-01 12:44:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 12:44:32,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:32,779 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] [2023-04-01 12:44:32,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-04-01 12:44:32,779 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:32,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -864540049, now seen corresponding path program 1 times [2023-04-01 12:44:32,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:32,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782133914] [2023-04-01 12:44:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:32,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:32,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782133914] [2023-04-01 12:44:32,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782133914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:32,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782032290] [2023-04-01 12:44:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:32,823 INFO L87 Difference]: Start difference. First operand 1150 states and 1460 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2023-04-01 12:44:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:34,321 INFO L93 Difference]: Finished difference Result 2460 states and 3150 transitions. [2023-04-01 12:44:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 102 [2023-04-01 12:44:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:34,325 INFO L225 Difference]: With dead ends: 2460 [2023-04-01 12:44:34,325 INFO L226 Difference]: Without dead ends: 1416 [2023-04-01 12:44:34,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:34,326 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 68 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:34,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2023-04-01 12:44:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1414. [2023-04-01 12:44:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1410 states have (on average 1.2645390070921987) internal successors, (1783), 1410 states have internal predecessors, (1783), 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) [2023-04-01 12:44:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1786 transitions. [2023-04-01 12:44:35,782 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1786 transitions. Word has length 102 [2023-04-01 12:44:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:35,782 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 1786 transitions. [2023-04-01 12:44:35,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2023-04-01 12:44:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1786 transitions. [2023-04-01 12:44:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 12:44:35,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:35,782 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] [2023-04-01 12:44:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-04-01 12:44:35,783 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:35,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 367008181, now seen corresponding path program 1 times [2023-04-01 12:44:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277198190] [2023-04-01 12:44:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277198190] [2023-04-01 12:44:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277198190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:35,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:44:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198920682] [2023-04-01 12:44:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:44:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:44:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:35,943 INFO L87 Difference]: Start difference. First operand 1414 states and 1786 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2023-04-01 12:44:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:38,420 INFO L93 Difference]: Finished difference Result 2126 states and 2658 transitions. [2023-04-01 12:44:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:44:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 103 [2023-04-01 12:44:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:38,425 INFO L225 Difference]: With dead ends: 2126 [2023-04-01 12:44:38,426 INFO L226 Difference]: Without dead ends: 2124 [2023-04-01 12:44:38,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:38,427 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 168 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:38,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 644 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2023-04-01 12:44:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1462. [2023-04-01 12:44:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1458 states have (on average 1.239368998628258) internal successors, (1807), 1458 states have internal predecessors, (1807), 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) [2023-04-01 12:44:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1810 transitions. [2023-04-01 12:44:40,012 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1810 transitions. Word has length 103 [2023-04-01 12:44:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:40,012 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1810 transitions. [2023-04-01 12:44:40,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2023-04-01 12:44:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1810 transitions. [2023-04-01 12:44:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 12:44:40,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:40,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:40,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-04-01 12:44:40,013 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:40,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1412803454, now seen corresponding path program 1 times [2023-04-01 12:44:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:40,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071955219] [2023-04-01 12:44:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 12:44:40,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071955219] [2023-04-01 12:44:40,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071955219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:40,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:40,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:44:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299319790] [2023-04-01 12:44:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:44:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:44:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:44:40,211 INFO L87 Difference]: Start difference. First operand 1462 states and 1810 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 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) [2023-04-01 12:44:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:42,995 INFO L93 Difference]: Finished difference Result 3661 states and 4548 transitions. [2023-04-01 12:44:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:44:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 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) Word has length 119 [2023-04-01 12:44:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:43,001 INFO L225 Difference]: With dead ends: 3661 [2023-04-01 12:44:43,001 INFO L226 Difference]: Without dead ends: 2290 [2023-04-01 12:44:43,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:44:43,003 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 436 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:43,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 356 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:44:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2023-04-01 12:44:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1462. [2023-04-01 12:44:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1458 states have (on average 1.237997256515775) internal successors, (1805), 1458 states have internal predecessors, (1805), 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) [2023-04-01 12:44:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1808 transitions. [2023-04-01 12:44:44,581 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1808 transitions. Word has length 119 [2023-04-01 12:44:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:44,582 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1808 transitions. [2023-04-01 12:44:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 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) [2023-04-01 12:44:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1808 transitions. [2023-04-01 12:44:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:44:44,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:44,582 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-04-01 12:44:44,583 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-04-01 12:44:44,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:44,583 INFO L85 PathProgramCache]: Analyzing trace with hash 649665595, now seen corresponding path program 1 times [2023-04-01 12:44:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438323826] [2023-04-01 12:44:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 12:44:45,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438323826] [2023-04-01 12:44:45,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438323826] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:45,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:45,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 12:44:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562062902] [2023-04-01 12:44:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 12:44:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 12:44:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:44:45,520 INFO L87 Difference]: Start difference. First operand 1462 states and 1808 transitions. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 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)