/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:30:39,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:30:39,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:30:39,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:30:39,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:30:39,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:30:39,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:30:39,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:30:39,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:30:39,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:30:39,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:30:39,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:30:39,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:30:39,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:30:39,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:30:40,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:30:40,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:30:40,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:30:40,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:30:40,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:30:40,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:30:40,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:30:40,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:30:40,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:30:40,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:30:40,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:30:40,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:30:40,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:30:40,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:30:40,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:30:40,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:30:40,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:30:40,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:30:40,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:30:40,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:30:40,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:30:40,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:30:40,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:30:40,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:30:40,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:30:40,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:30:40,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:30:40,064 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:30:40,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:30:40,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:30:40,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:30:40,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:30:40,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:30:40,066 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:30:40,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:30:40,066 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:30:40,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:30:40,067 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:30:40,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:30:40,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:30:40,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:30:40,067 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:30:40,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:30:40,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:30:40,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:30:40,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:30:40,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:30:40,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:30:40,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:30:40,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:30:40,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:30:40,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:30:40,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:30:40,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:30:40,319 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:30:40,319 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:30:40,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-04-03 03:30:41,527 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:30:42,099 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:30:42,099 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-04-03 03:30:42,162 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb27ed702/49797d9634904cb5b6e707727d8b40a9/FLAG93bf941fb [2023-04-03 03:30:42,179 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb27ed702/49797d9634904cb5b6e707727d8b40a9 [2023-04-03 03:30:42,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:30:42,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:30:42,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:30:42,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:30:42,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:30:42,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:30:42" (1/1) ... [2023-04-03 03:30:42,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2575b04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:42, skipping insertion in model container [2023-04-03 03:30:42,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:30:42" (1/1) ... [2023-04-03 03:30:42,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:30:42,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:30:43,409 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_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40132,40145] [2023-04-03 03:30:45,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:30:45,817 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:30:46,050 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_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40132,40145] [2023-04-03 03:30:47,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:30:47,925 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:30:47,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47 WrapperNode [2023-04-03 03:30:47,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:30:47,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:30:47,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:30:47,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:30:47,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:47,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,423 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:30:48,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:30:48,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:30:48,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:30:48,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (1/1) ... [2023-04-03 03:30:48,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:30:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:30:48,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:30:48,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:30:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:30:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:30:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:30:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:30:48,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:30:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:30:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:30:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:30:49,080 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:30:49,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:30:58,217 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:31:12,010 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:31:12,010 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:31:12,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:31:12 BoogieIcfgContainer [2023-04-03 03:31:12,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:31:12,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:31:12,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:31:12,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:31:12,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:30:42" (1/3) ... [2023-04-03 03:31:12,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d009d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:31:12, skipping insertion in model container [2023-04-03 03:31:12,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:30:47" (2/3) ... [2023-04-03 03:31:12,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d009d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:31:12, skipping insertion in model container [2023-04-03 03:31:12,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:31:12" (3/3) ... [2023-04-03 03:31:12,028 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2023-04-03 03:31:12,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:31:12,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:31:12,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:31:12,175 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;@53557dbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:31:12,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:31:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 5219 states, 5197 states have (on average 1.7029055224167788) internal successors, (8850), 5214 states have internal predecessors, (8850), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 03:31:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-03 03:31:12,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:12,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:12,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:12,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 295572833, now seen corresponding path program 1 times [2023-04-03 03:31:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718345302] [2023-04-03 03:31:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:13,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718345302] [2023-04-03 03:31:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718345302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:13,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:13,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:31:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067561884] [2023-04-03 03:31:13,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:31:13,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:31:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:13,528 INFO L87 Difference]: Start difference. First operand has 5219 states, 5197 states have (on average 1.7029055224167788) internal successors, (8850), 5214 states have internal predecessors, (8850), 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 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:14,889 INFO L93 Difference]: Finished difference Result 10236 states and 17167 transitions. [2023-04-03 03:31:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:31:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2023-04-03 03:31:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:14,946 INFO L225 Difference]: With dead ends: 10236 [2023-04-03 03:31:14,946 INFO L226 Difference]: Without dead ends: 6104 [2023-04-03 03:31:14,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:14,967 INFO L413 NwaCegarLoop]: 7657 mSDtfsCounter, 5781 mSDsluCounter, 4348 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5781 SdHoareTripleChecker+Valid, 12005 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5781 Valid, 12005 Invalid, 368 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 03:31:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2023-04-03 03:31:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6102. [2023-04-03 03:31:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6102 states, 6098 states have (on average 1.6011807149885209) internal successors, (9764), 6098 states have internal predecessors, (9764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6102 states to 6102 states and 9767 transitions. [2023-04-03 03:31:15,343 INFO L78 Accepts]: Start accepts. Automaton has 6102 states and 9767 transitions. Word has length 274 [2023-04-03 03:31:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:15,346 INFO L495 AbstractCegarLoop]: Abstraction has 6102 states and 9767 transitions. [2023-04-03 03:31:15,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6102 states and 9767 transitions. [2023-04-03 03:31:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-04-03 03:31:15,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:15,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:31:15,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:15,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1969958904, now seen corresponding path program 1 times [2023-04-03 03:31:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512475616] [2023-04-03 03:31:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:15,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512475616] [2023-04-03 03:31:15,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512475616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:15,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:15,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:31:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720315247] [2023-04-03 03:31:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:15,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:31:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:31:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:15,823 INFO L87 Difference]: Start difference. First operand 6102 states and 9767 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:17,255 INFO L93 Difference]: Finished difference Result 13282 states and 21362 transitions. [2023-04-03 03:31:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:31:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 284 [2023-04-03 03:31:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:17,306 INFO L225 Difference]: With dead ends: 13282 [2023-04-03 03:31:17,306 INFO L226 Difference]: Without dead ends: 8006 [2023-04-03 03:31:17,326 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 [2023-04-03 03:31:17,328 INFO L413 NwaCegarLoop]: 6768 mSDtfsCounter, 5608 mSDsluCounter, 3527 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5608 SdHoareTripleChecker+Valid, 10295 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:17,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5608 Valid, 10295 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 03:31:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2023-04-03 03:31:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 8004. [2023-04-03 03:31:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8000 states have (on average 1.6075) internal successors, (12860), 8000 states have internal predecessors, (12860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 12863 transitions. [2023-04-03 03:31:17,870 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 12863 transitions. Word has length 284 [2023-04-03 03:31:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:17,871 INFO L495 AbstractCegarLoop]: Abstraction has 8004 states and 12863 transitions. [2023-04-03 03:31:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 12863 transitions. [2023-04-03 03:31:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-03 03:31:17,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:17,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:17,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:31:17,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:17,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1826777297, now seen corresponding path program 1 times [2023-04-03 03:31:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277102541] [2023-04-03 03:31:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:18,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277102541] [2023-04-03 03:31:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277102541] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:18,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:31:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431034098] [2023-04-03 03:31:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:31:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:31:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:18,247 INFO L87 Difference]: Start difference. First operand 8004 states and 12863 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:19,816 INFO L93 Difference]: Finished difference Result 18384 states and 29520 transitions. [2023-04-03 03:31:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:31:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 294 [2023-04-03 03:31:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:19,869 INFO L225 Difference]: With dead ends: 18384 [2023-04-03 03:31:19,869 INFO L226 Difference]: Without dead ends: 11069 [2023-04-03 03:31:19,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:19,890 INFO L413 NwaCegarLoop]: 6532 mSDtfsCounter, 5562 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5562 SdHoareTripleChecker+Valid, 9844 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:19,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5562 Valid, 9844 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 03:31:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11069 states. [2023-04-03 03:31:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11069 to 11067. [2023-04-03 03:31:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11063 states have (on average 1.6014643405947753) internal successors, (17717), 11063 states have internal predecessors, (17717), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 17720 transitions. [2023-04-03 03:31:20,656 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 17720 transitions. Word has length 294 [2023-04-03 03:31:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:20,656 INFO L495 AbstractCegarLoop]: Abstraction has 11067 states and 17720 transitions. [2023-04-03 03:31:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 17720 transitions. [2023-04-03 03:31:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-04-03 03:31:20,678 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:20,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:20,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:31:20,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:20,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2072457759, now seen corresponding path program 1 times [2023-04-03 03:31:20,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:20,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825596983] [2023-04-03 03:31:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:20,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:21,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825596983] [2023-04-03 03:31:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825596983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:21,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:21,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:31:21,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331808380] [2023-04-03 03:31:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:21,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:31:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:31:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:21,173 INFO L87 Difference]: Start difference. First operand 11067 states and 17720 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:23,481 INFO L93 Difference]: Finished difference Result 26155 states and 41701 transitions. [2023-04-03 03:31:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:31:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 304 [2023-04-03 03:31:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:23,530 INFO L225 Difference]: With dead ends: 26155 [2023-04-03 03:31:23,530 INFO L226 Difference]: Without dead ends: 15722 [2023-04-03 03:31:23,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:23,554 INFO L413 NwaCegarLoop]: 7109 mSDtfsCounter, 5433 mSDsluCounter, 3227 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5433 SdHoareTripleChecker+Valid, 10336 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:23,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5433 Valid, 10336 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 03:31:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15722 states. [2023-04-03 03:31:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15722 to 15720. [2023-04-03 03:31:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15720 states, 15716 states have (on average 1.585136166963604) internal successors, (24912), 15716 states have internal predecessors, (24912), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15720 states to 15720 states and 24915 transitions. [2023-04-03 03:31:24,706 INFO L78 Accepts]: Start accepts. Automaton has 15720 states and 24915 transitions. Word has length 304 [2023-04-03 03:31:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:24,707 INFO L495 AbstractCegarLoop]: Abstraction has 15720 states and 24915 transitions. [2023-04-03 03:31:24,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 15720 states and 24915 transitions. [2023-04-03 03:31:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-04-03 03:31:24,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:24,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:31:24,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:24,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1939959695, now seen corresponding path program 1 times [2023-04-03 03:31:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499180869] [2023-04-03 03:31:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:24,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:25,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:25,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499180869] [2023-04-03 03:31:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499180869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:25,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:31:25,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244444006] [2023-04-03 03:31:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:31:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:31:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:25,121 INFO L87 Difference]: Start difference. First operand 15720 states and 24915 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:27,704 INFO L93 Difference]: Finished difference Result 37888 states and 59736 transitions. [2023-04-03 03:31:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:31:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 314 [2023-04-03 03:31:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:27,769 INFO L225 Difference]: With dead ends: 37888 [2023-04-03 03:31:27,769 INFO L226 Difference]: Without dead ends: 22788 [2023-04-03 03:31:27,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:31:27,803 INFO L413 NwaCegarLoop]: 6345 mSDtfsCounter, 5464 mSDsluCounter, 3227 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5464 SdHoareTripleChecker+Valid, 9572 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:27,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5464 Valid, 9572 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 03:31:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2023-04-03 03:31:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22786. [2023-04-03 03:31:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22786 states, 22782 states have (on average 1.5602229830567993) internal successors, (35545), 22782 states have internal predecessors, (35545), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22786 states to 22786 states and 35548 transitions. [2023-04-03 03:31:29,401 INFO L78 Accepts]: Start accepts. Automaton has 22786 states and 35548 transitions. Word has length 314 [2023-04-03 03:31:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:29,402 INFO L495 AbstractCegarLoop]: Abstraction has 22786 states and 35548 transitions. [2023-04-03 03:31:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 22786 states and 35548 transitions. [2023-04-03 03:31:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-03 03:31:29,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:29,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:29,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:31:29,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:29,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1957545294, now seen corresponding path program 1 times [2023-04-03 03:31:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:29,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694465626] [2023-04-03 03:31:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:29,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:31,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694465626] [2023-04-03 03:31:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694465626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:31,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:31,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:31:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903441111] [2023-04-03 03:31:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:31:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:31:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:31:31,847 INFO L87 Difference]: Start difference. First operand 22786 states and 35548 transitions. Second operand has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:37,121 INFO L93 Difference]: Finished difference Result 49228 states and 76573 transitions. [2023-04-03 03:31:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:31:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 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 324 [2023-04-03 03:31:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:37,212 INFO L225 Difference]: With dead ends: 49228 [2023-04-03 03:31:37,213 INFO L226 Difference]: Without dead ends: 40026 [2023-04-03 03:31:37,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:31:37,245 INFO L413 NwaCegarLoop]: 9776 mSDtfsCounter, 17206 mSDsluCounter, 12437 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17206 SdHoareTripleChecker+Valid, 22213 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:37,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17206 Valid, 22213 Invalid, 977 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 03:31:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40026 states. [2023-04-03 03:31:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40026 to 24386. [2023-04-03 03:31:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24386 states, 24382 states have (on average 1.5470839143630548) internal successors, (37721), 24382 states have internal predecessors, (37721), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24386 states to 24386 states and 37724 transitions. [2023-04-03 03:31:39,706 INFO L78 Accepts]: Start accepts. Automaton has 24386 states and 37724 transitions. Word has length 324 [2023-04-03 03:31:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:39,709 INFO L495 AbstractCegarLoop]: Abstraction has 24386 states and 37724 transitions. [2023-04-03 03:31:39,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 24386 states and 37724 transitions. [2023-04-03 03:31:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-03 03:31:39,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:39,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:39,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:31:39,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:39,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1021340534, now seen corresponding path program 1 times [2023-04-03 03:31:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:39,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368808069] [2023-04-03 03:31:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:39,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:41,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368808069] [2023-04-03 03:31:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368808069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:41,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:31:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320907836] [2023-04-03 03:31:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:41,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:31:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:31:41,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:31:41,572 INFO L87 Difference]: Start difference. First operand 24386 states and 37724 transitions. Second operand has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:31:48,507 INFO L93 Difference]: Finished difference Result 60872 states and 94181 transitions. [2023-04-03 03:31:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:31:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 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 324 [2023-04-03 03:31:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:31:48,615 INFO L225 Difference]: With dead ends: 60872 [2023-04-03 03:31:48,615 INFO L226 Difference]: Without dead ends: 51926 [2023-04-03 03:31:48,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:31:48,651 INFO L413 NwaCegarLoop]: 5547 mSDtfsCounter, 9842 mSDsluCounter, 8305 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9842 SdHoareTripleChecker+Valid, 13852 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 03:31:48,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9842 Valid, 13852 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 03:31:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51926 states. [2023-04-03 03:31:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51926 to 29646. [2023-04-03 03:31:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29646 states, 29642 states have (on average 1.5377167532555158) internal successors, (45581), 29642 states have internal predecessors, (45581), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29646 states to 29646 states and 45584 transitions. [2023-04-03 03:31:52,648 INFO L78 Accepts]: Start accepts. Automaton has 29646 states and 45584 transitions. Word has length 324 [2023-04-03 03:31:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:31:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 29646 states and 45584 transitions. [2023-04-03 03:31:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:31:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 29646 states and 45584 transitions. [2023-04-03 03:31:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-03 03:31:52,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:31:52,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:31:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:31:52,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:31:52,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:31:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1020470800, now seen corresponding path program 1 times [2023-04-03 03:31:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:31:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211932489] [2023-04-03 03:31:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:31:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:31:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:31:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:31:54,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:31:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211932489] [2023-04-03 03:31:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211932489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:31:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:31:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:31:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638891776] [2023-04-03 03:31:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:31:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:31:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:31:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:31:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:31:54,410 INFO L87 Difference]: Start difference. First operand 29646 states and 45584 transitions. Second operand has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:32:06,554 INFO L93 Difference]: Finished difference Result 83934 states and 129599 transitions. [2023-04-03 03:32:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:32:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 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 324 [2023-04-03 03:32:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:32:06,706 INFO L225 Difference]: With dead ends: 83934 [2023-04-03 03:32:06,706 INFO L226 Difference]: Without dead ends: 74524 [2023-04-03 03:32:06,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:32:06,752 INFO L413 NwaCegarLoop]: 3962 mSDtfsCounter, 8648 mSDsluCounter, 6186 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8648 SdHoareTripleChecker+Valid, 10148 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 03:32:06,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8648 Valid, 10148 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 03:32:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74524 states. [2023-04-03 03:32:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74524 to 40710. [2023-04-03 03:32:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40710 states, 40706 states have (on average 1.534982557853879) internal successors, (62483), 40706 states have internal predecessors, (62483), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40710 states to 40710 states and 62486 transitions. [2023-04-03 03:32:13,498 INFO L78 Accepts]: Start accepts. Automaton has 40710 states and 62486 transitions. Word has length 324 [2023-04-03 03:32:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:32:13,499 INFO L495 AbstractCegarLoop]: Abstraction has 40710 states and 62486 transitions. [2023-04-03 03:32:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.125) internal successors, (321), 8 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 40710 states and 62486 transitions. [2023-04-03 03:32:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-03 03:32:13,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:32:13,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:32:13,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:32:13,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:32:13,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:32:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1440409151, now seen corresponding path program 1 times [2023-04-03 03:32:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:32:13,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745489939] [2023-04-03 03:32:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:32:13,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:32:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:32:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:32:14,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:32:14,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745489939] [2023-04-03 03:32:14,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745489939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:32:14,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:32:14,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:32:14,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771773828] [2023-04-03 03:32:14,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:32:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:32:14,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:32:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:32:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:32:14,689 INFO L87 Difference]: Start difference. First operand 40710 states and 62486 transitions. Second operand has 5 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:32:27,066 INFO L93 Difference]: Finished difference Result 95599 states and 147528 transitions. [2023-04-03 03:32:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:32:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 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 324 [2023-04-03 03:32:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:32:27,205 INFO L225 Difference]: With dead ends: 95599 [2023-04-03 03:32:27,205 INFO L226 Difference]: Without dead ends: 75887 [2023-04-03 03:32:27,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:32:27,241 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3192 mSDsluCounter, 2885 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3192 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 03:32:27,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3192 Valid, 6095 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 03:32:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75887 states. [2023-04-03 03:32:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75887 to 49610. [2023-04-03 03:32:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49610 states, 49606 states have (on average 1.5211466354876426) internal successors, (75458), 49606 states have internal predecessors, (75458), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49610 states to 49610 states and 75461 transitions. [2023-04-03 03:32:35,738 INFO L78 Accepts]: Start accepts. Automaton has 49610 states and 75461 transitions. Word has length 324 [2023-04-03 03:32:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:32:35,739 INFO L495 AbstractCegarLoop]: Abstraction has 49610 states and 75461 transitions. [2023-04-03 03:32:35,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 49610 states and 75461 transitions. [2023-04-03 03:32:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-04-03 03:32:35,770 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:32:35,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:32:35,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:32:35,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:32:35,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:32:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash 826354650, now seen corresponding path program 1 times [2023-04-03 03:32:35,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:32:35,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568102876] [2023-04-03 03:32:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:32:35,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:32:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:32:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:32:36,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:32:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568102876] [2023-04-03 03:32:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568102876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:32:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:32:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:32:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666249757] [2023-04-03 03:32:36,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:32:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:32:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:32:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:32:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:32:37,001 INFO L87 Difference]: Start difference. First operand 49610 states and 75461 transitions. Second operand has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:32:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:32:58,627 INFO L93 Difference]: Finished difference Result 113491 states and 175554 transitions. [2023-04-03 03:32:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 03:32:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 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 325 [2023-04-03 03:32:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:32:58,843 INFO L225 Difference]: With dead ends: 113491 [2023-04-03 03:32:58,843 INFO L226 Difference]: Without dead ends: 95013 [2023-04-03 03:32:58,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:32:58,881 INFO L413 NwaCegarLoop]: 2113 mSDtfsCounter, 6286 mSDsluCounter, 10004 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6286 SdHoareTripleChecker+Valid, 12117 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 03:32:58,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6286 Valid, 12117 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 03:32:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95013 states. [2023-04-03 03:33:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95013 to 70878. [2023-04-03 03:33:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70878 states, 70874 states have (on average 1.5297852527019782) internal successors, (108422), 70874 states have internal predecessors, (108422), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:33:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70878 states to 70878 states and 108425 transitions. [2023-04-03 03:33:14,895 INFO L78 Accepts]: Start accepts. Automaton has 70878 states and 108425 transitions. Word has length 325 [2023-04-03 03:33:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:33:14,896 INFO L495 AbstractCegarLoop]: Abstraction has 70878 states and 108425 transitions. [2023-04-03 03:33:14,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:33:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 70878 states and 108425 transitions. [2023-04-03 03:33:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-04-03 03:33:14,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:33:14,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:33:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:33:14,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:33:14,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:33:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 123464711, now seen corresponding path program 1 times [2023-04-03 03:33:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:33:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376002163] [2023-04-03 03:33:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:33:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:33:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:33:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:33:15,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:33:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376002163] [2023-04-03 03:33:15,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376002163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:33:15,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:33:15,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:33:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840795549] [2023-04-03 03:33:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:33:15,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:33:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:33:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:33:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:33:15,249 INFO L87 Difference]: Start difference. First operand 70878 states and 108425 transitions. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:33:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:33:33,623 INFO L93 Difference]: Finished difference Result 119141 states and 184077 transitions. [2023-04-03 03:33:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:33:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 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 326 [2023-04-03 03:33:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:33:33,781 INFO L225 Difference]: With dead ends: 119141 [2023-04-03 03:33:33,781 INFO L226 Difference]: Without dead ends: 80902 [2023-04-03 03:33:33,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:33:33,835 INFO L413 NwaCegarLoop]: 1888 mSDtfsCounter, 2302 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 3751 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:33:33,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 3751 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:33:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80902 states. [2023-04-03 03:33:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80902 to 80900. [2023-04-03 03:33:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80900 states, 80896 states have (on average 1.5318309928797469) internal successors, (123919), 80896 states have internal predecessors, (123919), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:33:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80900 states to 80900 states and 123922 transitions. [2023-04-03 03:33:52,865 INFO L78 Accepts]: Start accepts. Automaton has 80900 states and 123922 transitions. Word has length 326 [2023-04-03 03:33:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:33:52,865 INFO L495 AbstractCegarLoop]: Abstraction has 80900 states and 123922 transitions. [2023-04-03 03:33:52,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:33:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 80900 states and 123922 transitions. [2023-04-03 03:33:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2023-04-03 03:33:52,917 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:33:52,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:33:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:33:52,917 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:33:52,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:33:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1939024414, now seen corresponding path program 1 times [2023-04-03 03:33:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:33:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881681872] [2023-04-03 03:33:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:33:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:33:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:33:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:33:53,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:33:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881681872] [2023-04-03 03:33:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881681872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:33:53,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:33:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:33:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702060473] [2023-04-03 03:33:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:33:53,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:33:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:33:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:33:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:33:53,163 INFO L87 Difference]: Start difference. First operand 80900 states and 123922 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:34:15,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:34:15,711 INFO L93 Difference]: Finished difference Result 129886 states and 200398 transitions. [2023-04-03 03:34:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:34:15,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 334 [2023-04-03 03:34:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:34:15,872 INFO L225 Difference]: With dead ends: 129886 [2023-04-03 03:34:15,872 INFO L226 Difference]: Without dead ends: 92028 [2023-04-03 03:34:15,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:34:15,922 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 204 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:34:15,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 3796 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:34:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92028 states.