/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_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:38:00,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:38:00,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:38:00,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:38:00,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:38:00,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:38:00,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:38:00,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:38:00,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:38:00,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:38:00,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:38:00,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:38:00,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:38:00,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:38:00,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:38:00,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:38:00,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:38:00,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:38:00,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:38:00,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:38:00,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:38:00,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:38:00,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:38:00,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:38:00,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:38:00,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:38:00,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:38:00,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:38:00,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:38:00,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:38:00,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:38:00,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:38:00,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:38:00,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:38:00,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:38:00,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:38:00,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:38:00,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:38:00,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:38:00,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:38:00,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:38:00,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:38:00,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:38:00,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:38:00,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:38:00,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:38:00,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:38:00,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:38:00,742 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:38:00,742 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:38:00,742 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:38:00,742 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:38:00,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:38:00,743 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:38:00,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:38:00,744 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:38:00,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:38:00,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:38:00,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:38:00,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:38:00,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:38:00,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:38:00,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:38:00,746 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:38:00,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:38:00,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:38:00,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:38:00,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:38:00,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:38:01,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:38:01,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:38:01,007 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:38:01,008 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:38:01,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:38:02,177 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:38:02,409 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:38:02,410 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:38:02,419 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad85c6eb/402780d78ddd434089d79eec48acde82/FLAGdc2657528 [2023-04-03 02:38:02,433 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad85c6eb/402780d78ddd434089d79eec48acde82 [2023-04-03 02:38:02,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:38:02,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:38:02,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:38:02,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:38:02,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:38:02,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c977c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02, skipping insertion in model container [2023-04-03 02:38:02,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:38:02,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:38:02,694 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-04-03 02:38:02,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:38:02,764 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:38:02,806 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-04-03 02:38:02,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:38:02,872 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:38:02,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02 WrapperNode [2023-04-03 02:38:02,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:38:02,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:38:02,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:38:02,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:38:02,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:38:02,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:38:02,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:38:02,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:38:02,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (1/1) ... [2023-04-03 02:38:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:38:02,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:38:02,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:38:03,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:38:03,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:38:03,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:38:03,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:38:03,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:38:03,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:38:03,019 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:38:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:38:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:38:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:38:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:38:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:38:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:38:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:38:03,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:38:03,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:38:03,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:38:03,129 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:38:03,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:38:03,734 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:38:03,906 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:38:03,907 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:38:03,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:38:03 BoogieIcfgContainer [2023-04-03 02:38:03,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:38:03,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:38:03,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:38:03,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:38:03,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:38:02" (1/3) ... [2023-04-03 02:38:03,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb6bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:38:03, skipping insertion in model container [2023-04-03 02:38:03,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:38:02" (2/3) ... [2023-04-03 02:38:03,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb6bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:38:03, skipping insertion in model container [2023-04-03 02:38:03,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:38:03" (3/3) ... [2023-04-03 02:38:03,918 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:38:03,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:38:03,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:38:03,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:38:03,987 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;@75b94ba2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:38:03,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:38:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 134 states have (on average 1.6940298507462686) internal successors, (227), 135 states have internal predecessors, (227), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:38:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:38:03,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:04,015 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] [2023-04-03 02:38:04,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:04,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:04,021 INFO L85 PathProgramCache]: Analyzing trace with hash -116993355, now seen corresponding path program 1 times [2023-04-03 02:38:04,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:04,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490002941] [2023-04-03 02:38:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:04,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490002941] [2023-04-03 02:38:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490002941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:04,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:04,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:38:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813124661] [2023-04-03 02:38:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:04,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:38:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:38:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:38:04,689 INFO L87 Difference]: Start difference. First operand has 140 states, 134 states have (on average 1.6940298507462686) internal successors, (227), 135 states have internal predecessors, (227), 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 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:05,004 INFO L93 Difference]: Finished difference Result 422 states and 666 transitions. [2023-04-03 02:38:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:38:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 58 [2023-04-03 02:38:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:05,023 INFO L225 Difference]: With dead ends: 422 [2023-04-03 02:38:05,023 INFO L226 Difference]: Without dead ends: 328 [2023-04-03 02:38:05,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:38:05,031 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 559 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:05,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 734 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:38:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-04-03 02:38:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 322. [2023-04-03 02:38:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 318 states have (on average 1.3836477987421383) internal successors, (440), 318 states have internal predecessors, (440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 443 transitions. [2023-04-03 02:38:05,135 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 443 transitions. Word has length 58 [2023-04-03 02:38:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:05,136 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 443 transitions. [2023-04-03 02:38:05,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 443 transitions. [2023-04-03 02:38:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:38:05,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:05,141 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] [2023-04-03 02:38:05,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:38:05,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:05,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1138715727, now seen corresponding path program 1 times [2023-04-03 02:38:05,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:05,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693809065] [2023-04-03 02:38:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:05,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:05,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693809065] [2023-04-03 02:38:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693809065] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:05,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649366263] [2023-04-03 02:38:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:05,328 INFO L87 Difference]: Start difference. First operand 322 states and 443 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:05,609 INFO L93 Difference]: Finished difference Result 768 states and 1089 transitions. [2023-04-03 02:38:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:38:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:05,615 INFO L225 Difference]: With dead ends: 768 [2023-04-03 02:38:05,619 INFO L226 Difference]: Without dead ends: 500 [2023-04-03 02:38:05,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:05,629 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 468 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:05,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 195 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:38:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-04-03 02:38:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 498. [2023-04-03 02:38:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 494 states have (on average 1.4129554655870444) internal successors, (698), 494 states have internal predecessors, (698), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 701 transitions. [2023-04-03 02:38:05,707 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 701 transitions. Word has length 59 [2023-04-03 02:38:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:05,707 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 701 transitions. [2023-04-03 02:38:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 701 transitions. [2023-04-03 02:38:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:38:05,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:05,709 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] [2023-04-03 02:38:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:38:05,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:05,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1168596450, now seen corresponding path program 1 times [2023-04-03 02:38:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865028400] [2023-04-03 02:38:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:05,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865028400] [2023-04-03 02:38:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865028400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077758847] [2023-04-03 02:38:05,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:05,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:05,833 INFO L87 Difference]: Start difference. First operand 498 states and 701 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:06,149 INFO L93 Difference]: Finished difference Result 1273 states and 1836 transitions. [2023-04-03 02:38:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:38:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:06,154 INFO L225 Difference]: With dead ends: 1273 [2023-04-03 02:38:06,154 INFO L226 Difference]: Without dead ends: 852 [2023-04-03 02:38:06,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:06,161 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 451 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:06,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 203 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-04-03 02:38:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 850. [2023-04-03 02:38:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 846 states have (on average 1.4326241134751774) internal successors, (1212), 846 states have internal predecessors, (1212), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1215 transitions. [2023-04-03 02:38:06,313 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1215 transitions. Word has length 59 [2023-04-03 02:38:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:06,314 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1215 transitions. [2023-04-03 02:38:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1215 transitions. [2023-04-03 02:38:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:38:06,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:06,316 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] [2023-04-03 02:38:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:38:06,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:06,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1662809107, now seen corresponding path program 1 times [2023-04-03 02:38:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:06,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672333771] [2023-04-03 02:38:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:06,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672333771] [2023-04-03 02:38:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672333771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082191448] [2023-04-03 02:38:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:06,450 INFO L87 Difference]: Start difference. First operand 850 states and 1215 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:06,828 INFO L93 Difference]: Finished difference Result 2302 states and 3349 transitions. [2023-04-03 02:38:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:38:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:06,835 INFO L225 Difference]: With dead ends: 2302 [2023-04-03 02:38:06,835 INFO L226 Difference]: Without dead ends: 1556 [2023-04-03 02:38:06,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:06,837 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 434 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:06,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 211 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-04-03 02:38:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2023-04-03 02:38:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1550 states have (on average 1.4438709677419355) internal successors, (2238), 1550 states have internal predecessors, (2238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2241 transitions. [2023-04-03 02:38:07,077 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2241 transitions. Word has length 59 [2023-04-03 02:38:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:07,077 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 2241 transitions. [2023-04-03 02:38:07,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2241 transitions. [2023-04-03 02:38:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:38:07,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:07,078 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] [2023-04-03 02:38:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:38:07,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:07,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 407874176, now seen corresponding path program 1 times [2023-04-03 02:38:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:07,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622257307] [2023-04-03 02:38:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:07,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:07,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622257307] [2023-04-03 02:38:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622257307] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:38:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689170669] [2023-04-03 02:38:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:07,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:38:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:38:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:38:07,202 INFO L87 Difference]: Start difference. First operand 1554 states and 2241 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:07,715 INFO L93 Difference]: Finished difference Result 4176 states and 6065 transitions. [2023-04-03 02:38:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:38:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:38:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:07,726 INFO L225 Difference]: With dead ends: 4176 [2023-04-03 02:38:07,726 INFO L226 Difference]: Without dead ends: 2660 [2023-04-03 02:38:07,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:38:07,729 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 461 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:07,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 187 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:38:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2023-04-03 02:38:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2658. [2023-04-03 02:38:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2654 states have (on average 1.436322532027129) internal successors, (3812), 2654 states have internal predecessors, (3812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3815 transitions. [2023-04-03 02:38:08,139 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3815 transitions. Word has length 59 [2023-04-03 02:38:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:08,140 INFO L495 AbstractCegarLoop]: Abstraction has 2658 states and 3815 transitions. [2023-04-03 02:38:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3815 transitions. [2023-04-03 02:38:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:38:08,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:08,141 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] [2023-04-03 02:38:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:38:08,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:08,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 795717162, now seen corresponding path program 1 times [2023-04-03 02:38:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361144116] [2023-04-03 02:38:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:09,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361144116] [2023-04-03 02:38:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361144116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:09,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:38:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280624675] [2023-04-03 02:38:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:38:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:09,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:38:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:38:09,242 INFO L87 Difference]: Start difference. First operand 2658 states and 3815 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:10,744 INFO L93 Difference]: Finished difference Result 5541 states and 7941 transitions. [2023-04-03 02:38:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:38:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 60 [2023-04-03 02:38:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:10,783 INFO L225 Difference]: With dead ends: 5541 [2023-04-03 02:38:10,783 INFO L226 Difference]: Without dead ends: 5539 [2023-04-03 02:38:10,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:38:10,787 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 853 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:10,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 822 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:38:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2023-04-03 02:38:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4553. [2023-04-03 02:38:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.4315234117388438) internal successors, (6512), 4549 states have internal predecessors, (6512), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6515 transitions. [2023-04-03 02:38:11,412 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6515 transitions. Word has length 60 [2023-04-03 02:38:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:11,412 INFO L495 AbstractCegarLoop]: Abstraction has 4553 states and 6515 transitions. [2023-04-03 02:38:11,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6515 transitions. [2023-04-03 02:38:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:38:11,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:11,413 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] [2023-04-03 02:38:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:38:11,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:11,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1890765450, now seen corresponding path program 1 times [2023-04-03 02:38:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389695137] [2023-04-03 02:38:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:11,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:12,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389695137] [2023-04-03 02:38:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389695137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:38:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718931648] [2023-04-03 02:38:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:38:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:38:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:38:12,644 INFO L87 Difference]: Start difference. First operand 4553 states and 6515 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:14,135 INFO L93 Difference]: Finished difference Result 6648 states and 9497 transitions. [2023-04-03 02:38:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:38:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 60 [2023-04-03 02:38:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:14,156 INFO L225 Difference]: With dead ends: 6648 [2023-04-03 02:38:14,156 INFO L226 Difference]: Without dead ends: 5830 [2023-04-03 02:38:14,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:38:14,159 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 710 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:14,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1547 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2023-04-03 02:38:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5293. [2023-04-03 02:38:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 5289 states have (on average 1.4286254490451882) internal successors, (7556), 5289 states have internal predecessors, (7556), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 7559 transitions. [2023-04-03 02:38:14,913 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 7559 transitions. Word has length 60 [2023-04-03 02:38:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:14,914 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 7559 transitions. [2023-04-03 02:38:14,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 7559 transitions. [2023-04-03 02:38:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:38:14,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:14,915 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] [2023-04-03 02:38:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:38:14,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:14,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1405331178, now seen corresponding path program 1 times [2023-04-03 02:38:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526305620] [2023-04-03 02:38:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:16,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526305620] [2023-04-03 02:38:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526305620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:16,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:38:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573053054] [2023-04-03 02:38:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:38:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:38:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:38:16,051 INFO L87 Difference]: Start difference. First operand 5293 states and 7559 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:17,320 INFO L93 Difference]: Finished difference Result 5971 states and 8500 transitions. [2023-04-03 02:38:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:38:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 60 [2023-04-03 02:38:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:17,343 INFO L225 Difference]: With dead ends: 5971 [2023-04-03 02:38:17,343 INFO L226 Difference]: Without dead ends: 5969 [2023-04-03 02:38:17,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:38:17,345 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1044 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:17,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 995 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:38:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2023-04-03 02:38:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 5309. [2023-04-03 02:38:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 5305 states have (on average 1.4275212064090481) internal successors, (7573), 5305 states have internal predecessors, (7573), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7576 transitions. [2023-04-03 02:38:17,977 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 7576 transitions. Word has length 60 [2023-04-03 02:38:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:17,977 INFO L495 AbstractCegarLoop]: Abstraction has 5309 states and 7576 transitions. [2023-04-03 02:38:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 7576 transitions. [2023-04-03 02:38:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:38:17,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:17,978 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] [2023-04-03 02:38:17,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:38:17,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:17,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash 508318154, now seen corresponding path program 1 times [2023-04-03 02:38:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:17,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47893243] [2023-04-03 02:38:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:18,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:18,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47893243] [2023-04-03 02:38:18,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47893243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:18,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:18,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:38:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754533273] [2023-04-03 02:38:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:38:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:38:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:38:18,971 INFO L87 Difference]: Start difference. First operand 5309 states and 7576 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:20,923 INFO L93 Difference]: Finished difference Result 9206 states and 13181 transitions. [2023-04-03 02:38:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:38:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 60 [2023-04-03 02:38:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:20,952 INFO L225 Difference]: With dead ends: 9206 [2023-04-03 02:38:20,952 INFO L226 Difference]: Without dead ends: 9204 [2023-04-03 02:38:20,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:38:20,958 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 581 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:20,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 2024 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:38:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2023-04-03 02:38:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 5966. [2023-04-03 02:38:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5966 states, 5962 states have (on average 1.4287151962428715) internal successors, (8518), 5962 states have internal predecessors, (8518), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 8521 transitions. [2023-04-03 02:38:21,648 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 8521 transitions. Word has length 60 [2023-04-03 02:38:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:21,648 INFO L495 AbstractCegarLoop]: Abstraction has 5966 states and 8521 transitions. [2023-04-03 02:38:21,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 8521 transitions. [2023-04-03 02:38:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:21,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:21,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:38:21,650 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:21,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1462723393, now seen corresponding path program 1 times [2023-04-03 02:38:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:21,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758651454] [2023-04-03 02:38:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:21,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:22,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:22,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758651454] [2023-04-03 02:38:22,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758651454] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:22,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988246742] [2023-04-03 02:38:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:22,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:22,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:22,609 INFO L87 Difference]: Start difference. First operand 5966 states and 8521 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:24,083 INFO L93 Difference]: Finished difference Result 8081 states and 11524 transitions. [2023-04-03 02:38:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:38:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:24,100 INFO L225 Difference]: With dead ends: 8081 [2023-04-03 02:38:24,100 INFO L226 Difference]: Without dead ends: 7263 [2023-04-03 02:38:24,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:38:24,104 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 633 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:24,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1896 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7263 states. [2023-04-03 02:38:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7263 to 5972. [2023-04-03 02:38:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5968 states have (on average 1.4284517426273458) internal successors, (8525), 5968 states have internal predecessors, (8525), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8528 transitions. [2023-04-03 02:38:24,922 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8528 transitions. Word has length 62 [2023-04-03 02:38:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:24,922 INFO L495 AbstractCegarLoop]: Abstraction has 5972 states and 8528 transitions. [2023-04-03 02:38:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8528 transitions. [2023-04-03 02:38:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:24,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:24,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:24,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:38:24,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:24,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1948157665, now seen corresponding path program 1 times [2023-04-03 02:38:24,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:24,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920402770] [2023-04-03 02:38:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:25,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:25,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920402770] [2023-04-03 02:38:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920402770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:25,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:25,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:25,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584259712] [2023-04-03 02:38:25,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:25,881 INFO L87 Difference]: Start difference. First operand 5972 states and 8528 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:27,603 INFO L93 Difference]: Finished difference Result 10710 states and 15302 transitions. [2023-04-03 02:38:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:38:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:27,623 INFO L225 Difference]: With dead ends: 10710 [2023-04-03 02:38:27,623 INFO L226 Difference]: Without dead ends: 10708 [2023-04-03 02:38:27,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:38:27,627 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 750 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:27,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 980 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2023-04-03 02:38:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 5972. [2023-04-03 02:38:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5968 states have (on average 1.42828418230563) internal successors, (8524), 5968 states have internal predecessors, (8524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8527 transitions. [2023-04-03 02:38:28,540 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8527 transitions. Word has length 62 [2023-04-03 02:38:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:28,540 INFO L495 AbstractCegarLoop]: Abstraction has 5972 states and 8527 transitions. [2023-04-03 02:38:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8527 transitions. [2023-04-03 02:38:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:28,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:28,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:28,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:38:28,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:28,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1873740417, now seen corresponding path program 1 times [2023-04-03 02:38:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13372933] [2023-04-03 02:38:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:29,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:29,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13372933] [2023-04-03 02:38:29,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13372933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:29,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:29,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:29,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678715229] [2023-04-03 02:38:29,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:29,523 INFO L87 Difference]: Start difference. First operand 5972 states and 8527 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:30,810 INFO L93 Difference]: Finished difference Result 7039 states and 10022 transitions. [2023-04-03 02:38:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:38:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:30,822 INFO L225 Difference]: With dead ends: 7039 [2023-04-03 02:38:30,823 INFO L226 Difference]: Without dead ends: 7037 [2023-04-03 02:38:30,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:38:30,825 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 517 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:30,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1665 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2023-04-03 02:38:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 5985. [2023-04-03 02:38:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5985 states, 5981 states have (on average 1.4278548737669285) internal successors, (8540), 5981 states have internal predecessors, (8540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 8543 transitions. [2023-04-03 02:38:31,594 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 8543 transitions. Word has length 62 [2023-04-03 02:38:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:31,595 INFO L495 AbstractCegarLoop]: Abstraction has 5985 states and 8543 transitions. [2023-04-03 02:38:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 8543 transitions. [2023-04-03 02:38:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:31,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:31,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:31,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:38:31,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:31,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash 424655871, now seen corresponding path program 1 times [2023-04-03 02:38:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:31,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615757651] [2023-04-03 02:38:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:31,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:32,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615757651] [2023-04-03 02:38:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615757651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:32,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776578463] [2023-04-03 02:38:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:32,509 INFO L87 Difference]: Start difference. First operand 5985 states and 8543 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:34,572 INFO L93 Difference]: Finished difference Result 10768 states and 15365 transitions. [2023-04-03 02:38:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-03 02:38:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:34,593 INFO L225 Difference]: With dead ends: 10768 [2023-04-03 02:38:34,593 INFO L226 Difference]: Without dead ends: 10766 [2023-04-03 02:38:34,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:38:34,597 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 589 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 993 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2023-04-03 02:38:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 5989. [2023-04-03 02:38:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 5985 states have (on average 1.4279030910609858) internal successors, (8546), 5985 states have internal predecessors, (8546), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 8549 transitions. [2023-04-03 02:38:35,445 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 8549 transitions. Word has length 62 [2023-04-03 02:38:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:35,446 INFO L495 AbstractCegarLoop]: Abstraction has 5989 states and 8549 transitions. [2023-04-03 02:38:35,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 8549 transitions. [2023-04-03 02:38:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:35,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:35,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:38:35,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:35,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1519704159, now seen corresponding path program 1 times [2023-04-03 02:38:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:35,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862290209] [2023-04-03 02:38:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:36,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:36,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862290209] [2023-04-03 02:38:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862290209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:36,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:36,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395641072] [2023-04-03 02:38:36,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:36,285 INFO L87 Difference]: Start difference. First operand 5989 states and 8549 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:38,280 INFO L93 Difference]: Finished difference Result 12957 states and 18522 transitions. [2023-04-03 02:38:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:38:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:38,296 INFO L225 Difference]: With dead ends: 12957 [2023-04-03 02:38:38,296 INFO L226 Difference]: Without dead ends: 11323 [2023-04-03 02:38:38,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:38:38,301 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 540 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:38,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1753 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:38:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2023-04-03 02:38:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 6699. [2023-04-03 02:38:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6695 states have (on average 1.423898431665422) internal successors, (9533), 6695 states have internal predecessors, (9533), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 9536 transitions. [2023-04-03 02:38:39,423 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 9536 transitions. Word has length 62 [2023-04-03 02:38:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:39,423 INFO L495 AbstractCegarLoop]: Abstraction has 6699 states and 9536 transitions. [2023-04-03 02:38:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 9536 transitions. [2023-04-03 02:38:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:38:39,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:39,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:39,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:38:39,425 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:39,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1034269887, now seen corresponding path program 1 times [2023-04-03 02:38:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:39,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901765202] [2023-04-03 02:38:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:39,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:40,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901765202] [2023-04-03 02:38:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901765202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:40,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:40,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:38:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790985641] [2023-04-03 02:38:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:38:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:38:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:38:40,353 INFO L87 Difference]: Start difference. First operand 6699 states and 9536 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:43,129 INFO L93 Difference]: Finished difference Result 12906 states and 18358 transitions. [2023-04-03 02:38:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:38:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:38:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:43,142 INFO L225 Difference]: With dead ends: 12906 [2023-04-03 02:38:43,142 INFO L226 Difference]: Without dead ends: 12904 [2023-04-03 02:38:43,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:38:43,144 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 687 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:43,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2216 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:38:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2023-04-03 02:38:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 7352. [2023-04-03 02:38:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 7348 states have (on average 1.4250136091453456) internal successors, (10471), 7348 states have internal predecessors, (10471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 10474 transitions. [2023-04-03 02:38:44,298 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 10474 transitions. Word has length 62 [2023-04-03 02:38:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:44,299 INFO L495 AbstractCegarLoop]: Abstraction has 7352 states and 10474 transitions. [2023-04-03 02:38:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 10474 transitions. [2023-04-03 02:38:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:38:44,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:44,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:38:44,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:44,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1077407840, now seen corresponding path program 1 times [2023-04-03 02:38:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:44,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242755967] [2023-04-03 02:38:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:44,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242755967] [2023-04-03 02:38:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242755967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:44,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:44,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:38:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3495688] [2023-04-03 02:38:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:38:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:38:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:44,349 INFO L87 Difference]: Start difference. First operand 7352 states and 10474 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:45,558 INFO L93 Difference]: Finished difference Result 13231 states and 18909 transitions. [2023-04-03 02:38:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:38:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 02:38:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:45,566 INFO L225 Difference]: With dead ends: 13231 [2023-04-03 02:38:45,566 INFO L226 Difference]: Without dead ends: 7107 [2023-04-03 02:38:45,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:45,577 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 115 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:45,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 304 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:38:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7107 states. [2023-04-03 02:38:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7107 to 7104. [2023-04-03 02:38:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7100 states have (on average 1.4225352112676057) internal successors, (10100), 7100 states have internal predecessors, (10100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 10103 transitions. [2023-04-03 02:38:46,647 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 10103 transitions. Word has length 63 [2023-04-03 02:38:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:46,647 INFO L495 AbstractCegarLoop]: Abstraction has 7104 states and 10103 transitions. [2023-04-03 02:38:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 10103 transitions. [2023-04-03 02:38:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:38:46,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:46,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:38:46,649 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:46,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash -584342493, now seen corresponding path program 1 times [2023-04-03 02:38:46,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:46,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308216983] [2023-04-03 02:38:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:46,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:46,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308216983] [2023-04-03 02:38:46,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308216983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:46,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:46,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:38:46,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288819911] [2023-04-03 02:38:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:46,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:38:46,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:38:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:46,690 INFO L87 Difference]: Start difference. First operand 7104 states and 10103 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:47,611 INFO L93 Difference]: Finished difference Result 13231 states and 18892 transitions. [2023-04-03 02:38:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:38:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 02:38:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:47,617 INFO L225 Difference]: With dead ends: 13231 [2023-04-03 02:38:47,617 INFO L226 Difference]: Without dead ends: 6305 [2023-04-03 02:38:47,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:47,627 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:47,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 304 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:38:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2023-04-03 02:38:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6254. [2023-04-03 02:38:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6250 states have (on average 1.41952) internal successors, (8872), 6250 states have internal predecessors, (8872), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 8875 transitions. [2023-04-03 02:38:48,612 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 8875 transitions. Word has length 63 [2023-04-03 02:38:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:48,612 INFO L495 AbstractCegarLoop]: Abstraction has 6254 states and 8875 transitions. [2023-04-03 02:38:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 8875 transitions. [2023-04-03 02:38:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:38:48,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:48,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:38:48,614 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:48,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1421304989, now seen corresponding path program 1 times [2023-04-03 02:38:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:48,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795521290] [2023-04-03 02:38:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:48,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795521290] [2023-04-03 02:38:48,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795521290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:48,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:48,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:38:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972015918] [2023-04-03 02:38:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:48,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:38:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:38:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:48,654 INFO L87 Difference]: Start difference. First operand 6254 states and 8875 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:49,540 INFO L93 Difference]: Finished difference Result 10697 states and 15229 transitions. [2023-04-03 02:38:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:38:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 02:38:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:49,546 INFO L225 Difference]: With dead ends: 10697 [2023-04-03 02:38:49,546 INFO L226 Difference]: Without dead ends: 6015 [2023-04-03 02:38:49,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:38:49,552 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 110 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:49,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 292 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:38:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2023-04-03 02:38:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 6013. [2023-04-03 02:38:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 6009 states have (on average 1.418039607255783) internal successors, (8521), 6009 states have internal predecessors, (8521), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 8524 transitions. [2023-04-03 02:38:50,408 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 8524 transitions. Word has length 63 [2023-04-03 02:38:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:50,409 INFO L495 AbstractCegarLoop]: Abstraction has 6013 states and 8524 transitions. [2023-04-03 02:38:50,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 8524 transitions. [2023-04-03 02:38:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:38:50,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:50,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:38:50,410 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:50,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash 943920756, now seen corresponding path program 1 times [2023-04-03 02:38:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:50,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208825113] [2023-04-03 02:38:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:50,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:52,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208825113] [2023-04-03 02:38:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208825113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:52,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:38:52,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540184218] [2023-04-03 02:38:52,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:38:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:38:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:38:52,152 INFO L87 Difference]: Start difference. First operand 6013 states and 8524 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:38:55,147 INFO L93 Difference]: Finished difference Result 6995 states and 9889 transitions. [2023-04-03 02:38:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:38:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 64 [2023-04-03 02:38:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:38:55,154 INFO L225 Difference]: With dead ends: 6995 [2023-04-03 02:38:55,154 INFO L226 Difference]: Without dead ends: 6993 [2023-04-03 02:38:55,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=1428, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:38:55,156 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 783 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:38:55,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 2311 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:38:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2023-04-03 02:38:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 6013. [2023-04-03 02:38:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 6009 states have (on average 1.418039607255783) internal successors, (8521), 6009 states have internal predecessors, (8521), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 8524 transitions. [2023-04-03 02:38:56,089 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 8524 transitions. Word has length 64 [2023-04-03 02:38:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:38:56,089 INFO L495 AbstractCegarLoop]: Abstraction has 6013 states and 8524 transitions. [2023-04-03 02:38:56,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:38:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 8524 transitions. [2023-04-03 02:38:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:38:56,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:38:56,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:38:56,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:38:56,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:38:56,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:38:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1570338476, now seen corresponding path program 1 times [2023-04-03 02:38:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:38:56,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051341960] [2023-04-03 02:38:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:38:56,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:38:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:38:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:38:58,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:38:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051341960] [2023-04-03 02:38:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051341960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:38:58,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:38:58,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:38:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874984863] [2023-04-03 02:38:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:38:58,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:38:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:38:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:38:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:38:58,117 INFO L87 Difference]: Start difference. First operand 6013 states and 8524 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:01,357 INFO L93 Difference]: Finished difference Result 8585 states and 12161 transitions. [2023-04-03 02:39:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 02:39:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 64 [2023-04-03 02:39:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:01,365 INFO L225 Difference]: With dead ends: 8585 [2023-04-03 02:39:01,365 INFO L226 Difference]: Without dead ends: 7831 [2023-04-03 02:39:01,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=444, Invalid=1536, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:39:01,367 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 839 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:01,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1987 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:39:01,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7831 states. [2023-04-03 02:39:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7831 to 5997. [2023-04-03 02:39:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5993 states have (on average 1.4189888202903387) internal successors, (8504), 5993 states have internal predecessors, (8504), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8507 transitions. [2023-04-03 02:39:02,370 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8507 transitions. Word has length 64 [2023-04-03 02:39:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:02,370 INFO L495 AbstractCegarLoop]: Abstraction has 5997 states and 8507 transitions. [2023-04-03 02:39:02,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8507 transitions. [2023-04-03 02:39:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:39:02,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:02,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:39:02,371 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:02,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2055772748, now seen corresponding path program 1 times [2023-04-03 02:39:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:02,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700042223] [2023-04-03 02:39:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:04,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700042223] [2023-04-03 02:39:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700042223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:39:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89924712] [2023-04-03 02:39:04,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:39:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:39:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:39:04,181 INFO L87 Difference]: Start difference. First operand 5997 states and 8507 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:07,868 INFO L93 Difference]: Finished difference Result 6614 states and 9356 transitions. [2023-04-03 02:39:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 02:39:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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 64 [2023-04-03 02:39:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:07,880 INFO L225 Difference]: With dead ends: 6614 [2023-04-03 02:39:07,880 INFO L226 Difference]: Without dead ends: 6612 [2023-04-03 02:39:07,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2023-04-03 02:39:07,885 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 766 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:07,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 2100 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:39:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6612 states. [2023-04-03 02:39:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6612 to 6003. [2023-04-03 02:39:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5999 states have (on average 1.4187364560760127) internal successors, (8511), 5999 states have internal predecessors, (8511), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 8514 transitions. [2023-04-03 02:39:08,946 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 8514 transitions. Word has length 64 [2023-04-03 02:39:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:08,946 INFO L495 AbstractCegarLoop]: Abstraction has 6003 states and 8514 transitions. [2023-04-03 02:39:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 8514 transitions. [2023-04-03 02:39:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:39:08,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:08,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:39:08,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:08,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1981355500, now seen corresponding path program 1 times [2023-04-03 02:39:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308719281] [2023-04-03 02:39:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:10,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:10,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308719281] [2023-04-03 02:39:10,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308719281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:10,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:10,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:39:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836667803] [2023-04-03 02:39:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:39:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:39:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:39:10,835 INFO L87 Difference]: Start difference. First operand 6003 states and 8514 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:14,326 INFO L93 Difference]: Finished difference Result 6994 states and 9890 transitions. [2023-04-03 02:39:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 02:39:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 64 [2023-04-03 02:39:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:14,335 INFO L225 Difference]: With dead ends: 6994 [2023-04-03 02:39:14,335 INFO L226 Difference]: Without dead ends: 6992 [2023-04-03 02:39:14,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=513, Invalid=1467, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:39:14,337 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 580 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:14,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 2498 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:39:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6992 states. [2023-04-03 02:39:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6992 to 6003. [2023-04-03 02:39:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5999 states have (on average 1.4187364560760127) internal successors, (8511), 5999 states have internal predecessors, (8511), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 8514 transitions. [2023-04-03 02:39:15,323 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 8514 transitions. Word has length 64 [2023-04-03 02:39:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:15,323 INFO L495 AbstractCegarLoop]: Abstraction has 6003 states and 8514 transitions. [2023-04-03 02:39:15,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 8514 transitions. [2023-04-03 02:39:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:39:15,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:15,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:15,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:39:15,324 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:15,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -749390567, now seen corresponding path program 1 times [2023-04-03 02:39:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:15,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661721441] [2023-04-03 02:39:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:15,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:15,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661721441] [2023-04-03 02:39:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661721441] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:15,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:15,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:15,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748166139] [2023-04-03 02:39:15,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:15,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:15,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:15,364 INFO L87 Difference]: Start difference. First operand 6003 states and 8514 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:16,436 INFO L93 Difference]: Finished difference Result 10661 states and 15169 transitions. [2023-04-03 02:39:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 65 [2023-04-03 02:39:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:16,442 INFO L225 Difference]: With dead ends: 10661 [2023-04-03 02:39:16,442 INFO L226 Difference]: Without dead ends: 5729 [2023-04-03 02:39:16,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:16,449 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:16,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 284 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5729 states. [2023-04-03 02:39:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5729 to 5727. [2023-04-03 02:39:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5727 states, 5723 states have (on average 1.4156910711165474) internal successors, (8102), 5723 states have internal predecessors, (8102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 8105 transitions. [2023-04-03 02:39:17,394 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 8105 transitions. Word has length 65 [2023-04-03 02:39:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:17,394 INFO L495 AbstractCegarLoop]: Abstraction has 5727 states and 8105 transitions. [2023-04-03 02:39:17,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 8105 transitions. [2023-04-03 02:39:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 02:39:17,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:17,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:39:17,395 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:17,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:17,395 INFO L85 PathProgramCache]: Analyzing trace with hash 605041097, now seen corresponding path program 1 times [2023-04-03 02:39:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:17,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176446415] [2023-04-03 02:39:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:22,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176446415] [2023-04-03 02:39:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176446415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:22,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:22,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2023-04-03 02:39:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309940665] [2023-04-03 02:39:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-03 02:39:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-03 02:39:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:39:22,516 INFO L87 Difference]: Start difference. First operand 5727 states and 8105 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:31,057 INFO L93 Difference]: Finished difference Result 6313 states and 8915 transitions. [2023-04-03 02:39:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 02:39:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-03 02:39:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:31,063 INFO L225 Difference]: With dead ends: 6313 [2023-04-03 02:39:31,063 INFO L226 Difference]: Without dead ends: 6311 [2023-04-03 02:39:31,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1046, Invalid=3924, Unknown=0, NotChecked=0, Total=4970 [2023-04-03 02:39:31,065 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 974 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 4235 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 4269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:31,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2168 Invalid, 4269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4235 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-03 02:39:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2023-04-03 02:39:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5703. [2023-04-03 02:39:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5703 states, 5699 states have (on average 1.4170907176697667) internal successors, (8076), 5699 states have internal predecessors, (8076), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5703 states to 5703 states and 8079 transitions. [2023-04-03 02:39:32,082 INFO L78 Accepts]: Start accepts. Automaton has 5703 states and 8079 transitions. Word has length 66 [2023-04-03 02:39:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:32,083 INFO L495 AbstractCegarLoop]: Abstraction has 5703 states and 8079 transitions. [2023-04-03 02:39:32,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5703 states and 8079 transitions. [2023-04-03 02:39:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:39:32,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:32,084 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:32,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:39:32,084 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:32,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1803986494, now seen corresponding path program 1 times [2023-04-03 02:39:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411755372] [2023-04-03 02:39:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:32,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411755372] [2023-04-03 02:39:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411755372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:32,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:32,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402562057] [2023-04-03 02:39:32,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:32,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:32,183 INFO L87 Difference]: Start difference. First operand 5703 states and 8079 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:33,688 INFO L93 Difference]: Finished difference Result 9236 states and 13206 transitions. [2023-04-03 02:39:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:33,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-03 02:39:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:33,697 INFO L225 Difference]: With dead ends: 9236 [2023-04-03 02:39:33,697 INFO L226 Difference]: Without dead ends: 7058 [2023-04-03 02:39:33,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:33,700 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 82 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:33,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 343 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2023-04-03 02:39:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6671. [2023-04-03 02:39:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6667 states have (on average 1.415929203539823) internal successors, (9440), 6667 states have internal predecessors, (9440), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 9443 transitions. [2023-04-03 02:39:34,817 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 9443 transitions. Word has length 71 [2023-04-03 02:39:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:34,817 INFO L495 AbstractCegarLoop]: Abstraction has 6671 states and 9443 transitions. [2023-04-03 02:39:34,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 9443 transitions. [2023-04-03 02:39:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:39:34,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:34,819 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:34,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:39:34,819 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:34,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -92953046, now seen corresponding path program 1 times [2023-04-03 02:39:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:34,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405091952] [2023-04-03 02:39:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:34,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405091952] [2023-04-03 02:39:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405091952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:34,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852991505] [2023-04-03 02:39:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:34,922 INFO L87 Difference]: Start difference. First operand 6671 states and 9443 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:36,388 INFO L93 Difference]: Finished difference Result 11624 states and 16591 transitions. [2023-04-03 02:39:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:39:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:36,397 INFO L225 Difference]: With dead ends: 11624 [2023-04-03 02:39:36,397 INFO L226 Difference]: Without dead ends: 8494 [2023-04-03 02:39:36,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:36,402 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 77 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:36,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 324 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2023-04-03 02:39:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 7974. [2023-04-03 02:39:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7974 states, 7970 states have (on average 1.4129234629861982) internal successors, (11261), 7970 states have internal predecessors, (11261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11264 transitions. [2023-04-03 02:39:37,929 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11264 transitions. Word has length 74 [2023-04-03 02:39:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:37,929 INFO L495 AbstractCegarLoop]: Abstraction has 7974 states and 11264 transitions. [2023-04-03 02:39:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11264 transitions. [2023-04-03 02:39:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:39:37,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:37,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:39:37,931 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:37,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1583471078, now seen corresponding path program 1 times [2023-04-03 02:39:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298069710] [2023-04-03 02:39:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:37,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:37,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298069710] [2023-04-03 02:39:37,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298069710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:37,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:37,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:37,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262174128] [2023-04-03 02:39:37,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:37,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:37,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:37,989 INFO L87 Difference]: Start difference. First operand 7974 states and 11264 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:40,019 INFO L93 Difference]: Finished difference Result 16182 states and 22843 transitions. [2023-04-03 02:39:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:39:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:40,036 INFO L225 Difference]: With dead ends: 16182 [2023-04-03 02:39:40,036 INFO L226 Difference]: Without dead ends: 11300 [2023-04-03 02:39:40,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:40,043 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 75 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:40,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 332 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2023-04-03 02:39:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 11298. [2023-04-03 02:39:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11298 states, 11294 states have (on average 1.4003895873915353) internal successors, (15816), 11294 states have internal predecessors, (15816), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11298 states to 11298 states and 15819 transitions. [2023-04-03 02:39:42,078 INFO L78 Accepts]: Start accepts. Automaton has 11298 states and 15819 transitions. Word has length 77 [2023-04-03 02:39:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:42,078 INFO L495 AbstractCegarLoop]: Abstraction has 11298 states and 15819 transitions. [2023-04-03 02:39:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 11298 states and 15819 transitions. [2023-04-03 02:39:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:39:42,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:42,080 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:42,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:39:42,080 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:42,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -617805434, now seen corresponding path program 1 times [2023-04-03 02:39:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:42,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130699199] [2023-04-03 02:39:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:42,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130699199] [2023-04-03 02:39:42,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130699199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:42,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:42,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:42,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680198039] [2023-04-03 02:39:42,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:42,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:42,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:42,168 INFO L87 Difference]: Start difference. First operand 11298 states and 15819 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:44,852 INFO L93 Difference]: Finished difference Result 22308 states and 31450 transitions. [2023-04-03 02:39:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:39:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:44,869 INFO L225 Difference]: With dead ends: 22308 [2023-04-03 02:39:44,869 INFO L226 Difference]: Without dead ends: 15330 [2023-04-03 02:39:44,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:44,877 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:44,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 305 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2023-04-03 02:39:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 14200. [2023-04-03 02:39:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14200 states, 14196 states have (on average 1.3928571428571428) internal successors, (19773), 14196 states have internal predecessors, (19773), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14200 states to 14200 states and 19776 transitions. [2023-04-03 02:39:47,513 INFO L78 Accepts]: Start accepts. Automaton has 14200 states and 19776 transitions. Word has length 77 [2023-04-03 02:39:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:47,513 INFO L495 AbstractCegarLoop]: Abstraction has 14200 states and 19776 transitions. [2023-04-03 02:39:47,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 14200 states and 19776 transitions. [2023-04-03 02:39:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:39:47,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:47,515 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:39:47,515 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:47,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1719652848, now seen corresponding path program 1 times [2023-04-03 02:39:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:47,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288554787] [2023-04-03 02:39:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:47,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:39:47,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:47,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288554787] [2023-04-03 02:39:47,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288554787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:47,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:47,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:39:47,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230870566] [2023-04-03 02:39:47,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:47,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:39:47,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:39:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:47,619 INFO L87 Difference]: Start difference. First operand 14200 states and 19776 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:39:51,383 INFO L93 Difference]: Finished difference Result 33292 states and 46532 transitions. [2023-04-03 02:39:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:39:51,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 80 [2023-04-03 02:39:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:39:51,414 INFO L225 Difference]: With dead ends: 33292 [2023-04-03 02:39:51,415 INFO L226 Difference]: Without dead ends: 20704 [2023-04-03 02:39:51,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:39:51,440 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 67 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:39:51,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 284 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:39:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2023-04-03 02:39:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 19134. [2023-04-03 02:39:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19134 states, 19130 states have (on average 1.3831155253528489) internal successors, (26459), 19130 states have internal predecessors, (26459), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19134 states to 19134 states and 26462 transitions. [2023-04-03 02:39:55,265 INFO L78 Accepts]: Start accepts. Automaton has 19134 states and 26462 transitions. Word has length 80 [2023-04-03 02:39:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:39:55,265 INFO L495 AbstractCegarLoop]: Abstraction has 19134 states and 26462 transitions. [2023-04-03 02:39:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:39:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19134 states and 26462 transitions. [2023-04-03 02:39:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:39:55,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:39:55,271 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:39:55,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-03 02:39:55,271 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:39:55,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:39:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1673181097, now seen corresponding path program 1 times [2023-04-03 02:39:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:39:55,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196573610] [2023-04-03 02:39:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:39:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:39:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:39:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:39:55,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:39:55,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196573610] [2023-04-03 02:39:55,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196573610] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:39:55,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:39:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:39:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036755349] [2023-04-03 02:39:55,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:39:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:39:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:39:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:39:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:39:55,785 INFO L87 Difference]: Start difference. First operand 19134 states and 26462 transitions. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:02,792 INFO L93 Difference]: Finished difference Result 45960 states and 63765 transitions. [2023-04-03 02:40:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:40:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2023-04-03 02:40:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:02,830 INFO L225 Difference]: With dead ends: 45960 [2023-04-03 02:40:02,830 INFO L226 Difference]: Without dead ends: 29802 [2023-04-03 02:40:02,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:40:02,939 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 904 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:02,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1104 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:40:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29802 states. [2023-04-03 02:40:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29802 to 23436. [2023-04-03 02:40:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23436 states, 23432 states have (on average 1.3846022533287812) internal successors, (32444), 23432 states have internal predecessors, (32444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23436 states to 23436 states and 32447 transitions. [2023-04-03 02:40:08,156 INFO L78 Accepts]: Start accepts. Automaton has 23436 states and 32447 transitions. Word has length 96 [2023-04-03 02:40:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:08,156 INFO L495 AbstractCegarLoop]: Abstraction has 23436 states and 32447 transitions. [2023-04-03 02:40:08,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 23436 states and 32447 transitions. [2023-04-03 02:40:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:40:08,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:08,162 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:08,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-04-03 02:40:08,163 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:08,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash 453748558, now seen corresponding path program 1 times [2023-04-03 02:40:08,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:08,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911315389] [2023-04-03 02:40:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:08,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:40:08,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:08,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911315389] [2023-04-03 02:40:08,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911315389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:08,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:08,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:40:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089329803] [2023-04-03 02:40:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:40:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:40:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:40:08,349 INFO L87 Difference]: Start difference. First operand 23436 states and 32447 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:20,743 INFO L93 Difference]: Finished difference Result 74506 states and 102793 transitions. [2023-04-03 02:40:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:40:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 96 [2023-04-03 02:40:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:20,836 INFO L225 Difference]: With dead ends: 74506 [2023-04-03 02:40:20,836 INFO L226 Difference]: Without dead ends: 52176 [2023-04-03 02:40:20,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:20,867 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 539 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:20,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 434 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:40:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52176 states. [2023-04-03 02:40:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52176 to 42779. [2023-04-03 02:40:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42779 states, 42775 states have (on average 1.3627118644067797) internal successors, (58290), 42775 states have internal predecessors, (58290), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42779 states to 42779 states and 58293 transitions. [2023-04-03 02:40:31,476 INFO L78 Accepts]: Start accepts. Automaton has 42779 states and 58293 transitions. Word has length 96 [2023-04-03 02:40:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:31,477 INFO L495 AbstractCegarLoop]: Abstraction has 42779 states and 58293 transitions. [2023-04-03 02:40:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42779 states and 58293 transitions. [2023-04-03 02:40:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:40:31,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:31,487 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:31,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-04-03 02:40:31,487 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:31,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash -43344909, now seen corresponding path program 1 times [2023-04-03 02:40:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:31,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141917410] [2023-04-03 02:40:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:33,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141917410] [2023-04-03 02:40:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141917410] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:40:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700071165] [2023-04-03 02:40:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:40:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:40:33,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:40:33,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:40:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:33,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-03 02:40:33,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:40:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-03 02:40:35,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:40:35,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700071165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:35,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:40:35,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [27] total 43 [2023-04-03 02:40:35,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859064135] [2023-04-03 02:40:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:35,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:40:35,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:40:35,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:40:35,970 INFO L87 Difference]: Start difference. First operand 42779 states and 58293 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:48,596 INFO L93 Difference]: Finished difference Result 57599 states and 78256 transitions. [2023-04-03 02:40:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2023-04-03 02:40:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:48,680 INFO L225 Difference]: With dead ends: 57599 [2023-04-03 02:40:48,680 INFO L226 Difference]: Without dead ends: 46825 [2023-04-03 02:40:48,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=306, Invalid=2244, Unknown=0, NotChecked=0, Total=2550 [2023-04-03 02:40:48,716 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 759 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:48,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1291 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:40:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46825 states. [2023-04-03 02:40:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46825 to 46231. [2023-04-03 02:40:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46231 states, 46227 states have (on average 1.3610444112747961) internal successors, (62917), 46227 states have internal predecessors, (62917), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46231 states to 46231 states and 62920 transitions. [2023-04-03 02:41:00,042 INFO L78 Accepts]: Start accepts. Automaton has 46231 states and 62920 transitions. Word has length 96 [2023-04-03 02:41:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:00,042 INFO L495 AbstractCegarLoop]: Abstraction has 46231 states and 62920 transitions. [2023-04-03 02:41:00,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 46231 states and 62920 transitions. [2023-04-03 02:41:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:41:00,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:00,053 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:41:00,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:41:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-04-03 02:41:00,260 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:00,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 31709340, now seen corresponding path program 1 times [2023-04-03 02:41:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:00,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318792537] [2023-04-03 02:41:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-03 02:41:00,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318792537] [2023-04-03 02:41:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318792537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:41:00,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469176349] [2023-04-03 02:41:00,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:41:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:41:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:41:00,409 INFO L87 Difference]: Start difference. First operand 46231 states and 62920 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:22,862 INFO L93 Difference]: Finished difference Result 126100 states and 171441 transitions. [2023-04-03 02:41:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:41:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2023-04-03 02:41:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:23,012 INFO L225 Difference]: With dead ends: 126100 [2023-04-03 02:41:23,012 INFO L226 Difference]: Without dead ends: 84061 [2023-04-03 02:41:23,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:41:23,075 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 941 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:23,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 240 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:41:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84061 states. [2023-04-03 02:41:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84061 to 70538. [2023-04-03 02:41:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70538 states, 70534 states have (on average 1.3525817336320072) internal successors, (95403), 70534 states have internal predecessors, (95403), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70538 states to 70538 states and 95406 transitions. [2023-04-03 02:41:43,298 INFO L78 Accepts]: Start accepts. Automaton has 70538 states and 95406 transitions. Word has length 96 [2023-04-03 02:41:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:43,298 INFO L495 AbstractCegarLoop]: Abstraction has 70538 states and 95406 transitions. [2023-04-03 02:41:43,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 70538 states and 95406 transitions. [2023-04-03 02:41:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:41:43,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:43,306 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:41:43,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-04-03 02:41:43,307 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:43,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1806553303, now seen corresponding path program 1 times [2023-04-03 02:41:43,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:43,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424779597] [2023-04-03 02:41:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:43,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:44,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424779597] [2023-04-03 02:41:44,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424779597] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:41:44,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402673949] [2023-04-03 02:41:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:44,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:41:44,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:41:44,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:41:44,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:41:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:45,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-03 02:41:45,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:41:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-03 02:41:46,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:41:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402673949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:46,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:41:46,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [23] total 37 [2023-04-03 02:41:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100417310] [2023-04-03 02:41:46,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:46,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:41:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:41:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:41:46,448 INFO L87 Difference]: Start difference. First operand 70538 states and 95406 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 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)