/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:39:52,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:39:52,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:39:52,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:39:52,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:39:52,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:39:52,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:39:52,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:39:52,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:39:52,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:39:52,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:39:52,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:39:52,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:39:52,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:39:52,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:39:52,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:39:52,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 12:39:52,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:39:52,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:39:52,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:39:52,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:39:52,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:39:52,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:39:52,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:39:52,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:39:52,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:39:52,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:39:52,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:39:52,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:39:52,139 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:39:52,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:39:52,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:39:52,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:39:52,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:39:52,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:39:52,141 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:39:52,142 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:39:52,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:39:52,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:39:52,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:39:52,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:39:52,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:39:52,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:39:52,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:39:52,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:39:52,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:39:52,336 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:39:52,337 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:39:52,338 INFO L432 ainManager$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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 12:39:53,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:39:53,515 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:39:53,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 12:39:53,524 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8408d3372/bd403ed2894d435490c7c1842bd705de/FLAG2562af2f5 [2023-04-01 12:39:53,533 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8408d3372/bd403ed2894d435490c7c1842bd705de [2023-04-01 12:39:53,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:39:53,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:39:53,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:39:53,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:39:53,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:39:53,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4207af8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53, skipping insertion in model container [2023-04-01 12:39:53,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:39:53,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:39:53,719 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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2023-04-01 12:39:53,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:39:53,777 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:39:53,834 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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2023-04-01 12:39:53,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:39:53,871 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:39:53,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53 WrapperNode [2023-04-01 12:39:53,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:39:53,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:39:53,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:39:53,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:39:53,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:39:53,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:39:53,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:39:53,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:39:53,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (1/1) ... [2023-04-01 12:39:53,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:39:53,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:39:53,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:39:53,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:39:54,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:39:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:39:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:39:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:39:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:39:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:39:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:39:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:39:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:39:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:39:54,112 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:39:54,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:39:54,646 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:39:54,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:39:54,786 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:39:54,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:39:54 BoogieIcfgContainer [2023-04-01 12:39:54,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:39:54,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:39:54,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:39:54,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:39:54,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:39:53" (1/3) ... [2023-04-01 12:39:54,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d439fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:39:54, skipping insertion in model container [2023-04-01 12:39:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:39:53" (2/3) ... [2023-04-01 12:39:54,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d439fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:39:54, skipping insertion in model container [2023-04-01 12:39:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:39:54" (3/3) ... [2023-04-01 12:39:54,796 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-01 12:39:54,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:39:54,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:39:54,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:39:54,862 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;@58a80789, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:39:54,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:39:54,866 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) [2023-04-01 12:39:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:39:54,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:54,873 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] [2023-04-01 12:39:54,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:54,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1743455769, now seen corresponding path program 1 times [2023-04-01 12:39:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:54,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175726375] [2023-04-01 12:39:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:55,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:55,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175726375] [2023-04-01 12:39:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175726375] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:55,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:39:55,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804891918] [2023-04-01 12:39:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:39:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:39:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:39:55,423 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) [2023-04-01 12:39:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:55,701 INFO L93 Difference]: Finished difference Result 422 states and 666 transitions. [2023-04-01 12:39:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:39:55,703 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 [2023-04-01 12:39:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:55,719 INFO L225 Difference]: With dead ends: 422 [2023-04-01 12:39:55,719 INFO L226 Difference]: Without dead ends: 328 [2023-04-01 12:39:55,723 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 [2023-04-01 12:39:55,727 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:55,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 734 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-04-01 12:39:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 322. [2023-04-01 12:39:55,831 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) [2023-04-01 12:39:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 443 transitions. [2023-04-01 12:39:55,835 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 443 transitions. Word has length 58 [2023-04-01 12:39:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:55,836 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 443 transitions. [2023-04-01 12:39:55,836 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) [2023-04-01 12:39:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 443 transitions. [2023-04-01 12:39:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:39:55,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:55,839 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] [2023-04-01 12:39:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:39:55,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:55,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1295802445, now seen corresponding path program 1 times [2023-04-01 12:39:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:55,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223597292] [2023-04-01 12:39:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:56,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223597292] [2023-04-01 12:39:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223597292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:56,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:39:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489134671] [2023-04-01 12:39:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:39:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:39:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:56,012 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) [2023-04-01 12:39:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:56,238 INFO L93 Difference]: Finished difference Result 768 states and 1089 transitions. [2023-04-01 12:39:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:56,239 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 [2023-04-01 12:39:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:56,243 INFO L225 Difference]: With dead ends: 768 [2023-04-01 12:39:56,250 INFO L226 Difference]: Without dead ends: 500 [2023-04-01 12:39:56,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:39:56,258 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 468 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:56,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 195 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-04-01 12:39:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 498. [2023-04-01 12:39:56,331 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) [2023-04-01 12:39:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 701 transitions. [2023-04-01 12:39:56,333 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 701 transitions. Word has length 59 [2023-04-01 12:39:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 701 transitions. [2023-04-01 12:39:56,334 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) [2023-04-01 12:39:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 701 transitions. [2023-04-01 12:39:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:39:56,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:56,340 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] [2023-04-01 12:39:56,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:39:56,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:56,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash 691852674, now seen corresponding path program 1 times [2023-04-01 12:39:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034497553] [2023-04-01 12:39:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:56,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034497553] [2023-04-01 12:39:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034497553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:56,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:56,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:39:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904336408] [2023-04-01 12:39:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:56,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:39:56,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:39:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:56,484 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) [2023-04-01 12:39:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:56,741 INFO L93 Difference]: Finished difference Result 1273 states and 1836 transitions. [2023-04-01 12:39:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:56,741 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 [2023-04-01 12:39:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:56,744 INFO L225 Difference]: With dead ends: 1273 [2023-04-01 12:39:56,744 INFO L226 Difference]: Without dead ends: 852 [2023-04-01 12:39:56,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:39:56,750 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 [2023-04-01 12:39:56,752 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] [2023-04-01 12:39:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-04-01 12:39:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 850. [2023-04-01 12:39:56,849 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) [2023-04-01 12:39:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1215 transitions. [2023-04-01 12:39:56,851 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1215 transitions. Word has length 59 [2023-04-01 12:39:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:56,853 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1215 transitions. [2023-04-01 12:39:56,853 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) [2023-04-01 12:39:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1215 transitions. [2023-04-01 12:39:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:39:56,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:56,854 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] [2023-04-01 12:39:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:39:56,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:56,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash 197640017, now seen corresponding path program 1 times [2023-04-01 12:39:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:56,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290215988] [2023-04-01 12:39:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:56,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:56,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290215988] [2023-04-01 12:39:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290215988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:39:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848426405] [2023-04-01 12:39:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:57,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:39:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:57,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:39:57,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:57,017 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) [2023-04-01 12:39:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:57,328 INFO L93 Difference]: Finished difference Result 2302 states and 3349 transitions. [2023-04-01 12:39:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:57,329 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 [2023-04-01 12:39:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:57,334 INFO L225 Difference]: With dead ends: 2302 [2023-04-01 12:39:57,334 INFO L226 Difference]: Without dead ends: 1556 [2023-04-01 12:39:57,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:39:57,340 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 [2023-04-01 12:39:57,341 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] [2023-04-01 12:39:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-04-01 12:39:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2023-04-01 12:39:57,504 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) [2023-04-01 12:39:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2241 transitions. [2023-04-01 12:39:57,507 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2241 transitions. Word has length 59 [2023-04-01 12:39:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:57,508 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 2241 transitions. [2023-04-01 12:39:57,508 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) [2023-04-01 12:39:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2241 transitions. [2023-04-01 12:39:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:39:57,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:57,509 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] [2023-04-01 12:39:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:39:57,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:57,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2026643996, now seen corresponding path program 1 times [2023-04-01 12:39:57,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582642121] [2023-04-01 12:39:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:57,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582642121] [2023-04-01 12:39:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582642121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:57,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:39:57,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516327694] [2023-04-01 12:39:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:57,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:39:57,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:39:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:57,581 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) [2023-04-01 12:39:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:58,014 INFO L93 Difference]: Finished difference Result 4176 states and 6065 transitions. [2023-04-01 12:39:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:58,014 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 [2023-04-01 12:39:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:58,023 INFO L225 Difference]: With dead ends: 4176 [2023-04-01 12:39:58,023 INFO L226 Difference]: Without dead ends: 2660 [2023-04-01 12:39:58,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:39:58,025 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 [2023-04-01 12:39:58,025 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] [2023-04-01 12:39:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2023-04-01 12:39:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2658. [2023-04-01 12:39:58,253 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) [2023-04-01 12:39:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3815 transitions. [2023-04-01 12:39:58,260 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3815 transitions. Word has length 59 [2023-04-01 12:39:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:58,261 INFO L495 AbstractCegarLoop]: Abstraction has 2658 states and 3815 transitions. [2023-04-01 12:39:58,261 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) [2023-04-01 12:39:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3815 transitions. [2023-04-01 12:39:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:39:58,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:58,261 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] [2023-04-01 12:39:58,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:39:58,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:58,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1638801010, now seen corresponding path program 1 times [2023-04-01 12:39:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939325524] [2023-04-01 12:39:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:39:59,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939325524] [2023-04-01 12:39:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939325524] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:59,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:59,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:39:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395908378] [2023-04-01 12:39:59,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:39:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:39:59,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:39:59,201 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) [2023-04-01 12:40:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:00,397 INFO L93 Difference]: Finished difference Result 5541 states and 7941 transitions. [2023-04-01 12:40:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:40:00,398 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 [2023-04-01 12:40:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:00,412 INFO L225 Difference]: With dead ends: 5541 [2023-04-01 12:40:00,413 INFO L226 Difference]: Without dead ends: 5539 [2023-04-01 12:40:00,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:40:00,417 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 853 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:00,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 822 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:40:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2023-04-01 12:40:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4553. [2023-04-01 12:40:00,890 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) [2023-04-01 12:40:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6515 transitions. [2023-04-01 12:40:00,901 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6515 transitions. Word has length 60 [2023-04-01 12:40:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:00,901 INFO L495 AbstractCegarLoop]: Abstraction has 4553 states and 6515 transitions. [2023-04-01 12:40:00,902 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) [2023-04-01 12:40:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6515 transitions. [2023-04-01 12:40:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:40:00,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:00,902 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] [2023-04-01 12:40:00,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:40:00,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:00,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:00,903 INFO L85 PathProgramCache]: Analyzing trace with hash -543752722, now seen corresponding path program 1 times [2023-04-01 12:40:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:00,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102406400] [2023-04-01 12:40:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:01,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:01,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102406400] [2023-04-01 12:40:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102406400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:01,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:01,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:40:01,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907352762] [2023-04-01 12:40:01,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:01,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:40:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:01,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:40:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:40:01,797 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) [2023-04-01 12:40:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:02,820 INFO L93 Difference]: Finished difference Result 6648 states and 9497 transitions. [2023-04-01 12:40:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:40:02,821 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 [2023-04-01 12:40:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:02,836 INFO L225 Difference]: With dead ends: 6648 [2023-04-01 12:40:02,836 INFO L226 Difference]: Without dead ends: 5830 [2023-04-01 12:40:02,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-04-01 12:40:02,839 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 710 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:02,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1547 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:40:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2023-04-01 12:40:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5293. [2023-04-01 12:40:03,437 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) [2023-04-01 12:40:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 7559 transitions. [2023-04-01 12:40:03,449 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 7559 transitions. Word has length 60 [2023-04-01 12:40:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:03,450 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 7559 transitions. [2023-04-01 12:40:03,450 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) [2023-04-01 12:40:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 7559 transitions. [2023-04-01 12:40:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:40:03,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:03,451 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] [2023-04-01 12:40:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:40:03,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:03,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1029186994, now seen corresponding path program 1 times [2023-04-01 12:40:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:03,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446667887] [2023-04-01 12:40:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:03,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:04,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446667887] [2023-04-01 12:40:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446667887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:04,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:04,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:40:04,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833093802] [2023-04-01 12:40:04,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:40:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:40:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:40:04,245 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) [2023-04-01 12:40:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:05,288 INFO L93 Difference]: Finished difference Result 5971 states and 8500 transitions. [2023-04-01 12:40:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:40:05,288 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 [2023-04-01 12:40:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:05,306 INFO L225 Difference]: With dead ends: 5971 [2023-04-01 12:40:05,307 INFO L226 Difference]: Without dead ends: 5969 [2023-04-01 12:40:05,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-04-01 12:40:05,310 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1044 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-04-01 12:40:05,310 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] [2023-04-01 12:40:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2023-04-01 12:40:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 5309. [2023-04-01 12:40:05,846 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) [2023-04-01 12:40:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7576 transitions. [2023-04-01 12:40:05,857 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 7576 transitions. Word has length 60 [2023-04-01 12:40:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:05,858 INFO L495 AbstractCegarLoop]: Abstraction has 5309 states and 7576 transitions. [2023-04-01 12:40:05,858 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) [2023-04-01 12:40:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 7576 transitions. [2023-04-01 12:40:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:40:05,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:05,859 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] [2023-04-01 12:40:05,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:40:05,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:05,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1926200018, now seen corresponding path program 1 times [2023-04-01 12:40:05,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:05,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485030094] [2023-04-01 12:40:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:05,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:06,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485030094] [2023-04-01 12:40:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485030094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:06,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:40:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803542954] [2023-04-01 12:40:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:40:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:40:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:40:06,713 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) [2023-04-01 12:40:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:08,440 INFO L93 Difference]: Finished difference Result 9206 states and 13181 transitions. [2023-04-01 12:40:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:40:08,441 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 [2023-04-01 12:40:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:08,460 INFO L225 Difference]: With dead ends: 9206 [2023-04-01 12:40:08,461 INFO L226 Difference]: Without dead ends: 9204 [2023-04-01 12:40:08,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:40:08,465 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 [2023-04-01 12:40:08,465 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] [2023-04-01 12:40:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2023-04-01 12:40:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 5966. [2023-04-01 12:40:09,099 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) [2023-04-01 12:40:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 8521 transitions. [2023-04-01 12:40:09,107 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 8521 transitions. Word has length 60 [2023-04-01 12:40:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:09,107 INFO L495 AbstractCegarLoop]: Abstraction has 5966 states and 8521 transitions. [2023-04-01 12:40:09,107 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) [2023-04-01 12:40:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 8521 transitions. [2023-04-01 12:40:09,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:09,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:09,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:09,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:40:09,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:09,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 397725731, now seen corresponding path program 1 times [2023-04-01 12:40:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:09,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599280700] [2023-04-01 12:40:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:10,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599280700] [2023-04-01 12:40:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599280700] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:10,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:10,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:40:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28654576] [2023-04-01 12:40:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:40:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:40:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:40:10,289 INFO L87 Difference]: Start difference. First operand 5966 states and 8521 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:12,951 INFO L93 Difference]: Finished difference Result 8213 states and 11696 transitions. [2023-04-01 12:40:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 12:40:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:40:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:12,964 INFO L225 Difference]: With dead ends: 8213 [2023-04-01 12:40:12,965 INFO L226 Difference]: Without dead ends: 8211 [2023-04-01 12:40:12,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 12:40:12,967 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 776 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:12,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 1720 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 12:40:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2023-04-01 12:40:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 5988. [2023-04-01 12:40:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 5984 states have (on average 1.4276403743315509) internal successors, (8543), 5984 states have internal predecessors, (8543), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 8546 transitions. [2023-04-01 12:40:13,619 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 8546 transitions. Word has length 62 [2023-04-01 12:40:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:13,619 INFO L495 AbstractCegarLoop]: Abstraction has 5988 states and 8546 transitions. [2023-04-01 12:40:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 8546 transitions. [2023-04-01 12:40:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:13,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:13,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:40:13,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:13,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash -87708541, now seen corresponding path program 1 times [2023-04-01 12:40:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259330779] [2023-04-01 12:40:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:14,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:14,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259330779] [2023-04-01 12:40:14,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259330779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:14,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 12:40:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724770913] [2023-04-01 12:40:14,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 12:40:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 12:40:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:40:14,335 INFO L87 Difference]: Start difference. First operand 5988 states and 8546 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) [2023-04-01 12:40:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:15,988 INFO L93 Difference]: Finished difference Result 10726 states and 15320 transitions. [2023-04-01 12:40:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:40:15,988 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 [2023-04-01 12:40:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:16,003 INFO L225 Difference]: With dead ends: 10726 [2023-04-01 12:40:16,003 INFO L226 Difference]: Without dead ends: 10724 [2023-04-01 12:40:16,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-04-01 12:40:16,006 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 737 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:16,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 937 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:40:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2023-04-01 12:40:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 5991. [2023-04-01 12:40:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5991 states, 5987 states have (on average 1.4274260898613662) internal successors, (8546), 5987 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) [2023-04-01 12:40:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 8549 transitions. [2023-04-01 12:40:16,707 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 8549 transitions. Word has length 62 [2023-04-01 12:40:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:16,707 INFO L495 AbstractCegarLoop]: Abstraction has 5991 states and 8549 transitions. [2023-04-01 12:40:16,708 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) [2023-04-01 12:40:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 8549 transitions. [2023-04-01 12:40:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:16,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:16,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:40:16,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:16,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -13291293, now seen corresponding path program 1 times [2023-04-01 12:40:16,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172233678] [2023-04-01 12:40:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:17,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:17,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172233678] [2023-04-01 12:40:17,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172233678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:17,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:17,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:40:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816352875] [2023-04-01 12:40:17,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:17,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:40:17,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:17,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:40:17,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:40:17,858 INFO L87 Difference]: Start difference. First operand 5991 states and 8549 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:20,053 INFO L93 Difference]: Finished difference Result 6648 states and 9463 transitions. [2023-04-01 12:40:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:40:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:40:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:20,063 INFO L225 Difference]: With dead ends: 6648 [2023-04-01 12:40:20,063 INFO L226 Difference]: Without dead ends: 6646 [2023-04-01 12:40:20,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 12:40:20,066 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 895 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:20,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1534 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:40:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2023-04-01 12:40:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5991. [2023-04-01 12:40:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5991 states, 5987 states have (on average 1.4274260898613662) internal successors, (8546), 5987 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) [2023-04-01 12:40:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 8549 transitions. [2023-04-01 12:40:20,763 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 8549 transitions. Word has length 62 [2023-04-01 12:40:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:20,764 INFO L495 AbstractCegarLoop]: Abstraction has 5991 states and 8549 transitions. [2023-04-01 12:40:20,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 8549 transitions. [2023-04-01 12:40:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:20,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:20,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:40:20,765 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:20,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2009862301, now seen corresponding path program 1 times [2023-04-01 12:40:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332994401] [2023-04-01 12:40:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:21,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332994401] [2023-04-01 12:40:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332994401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:21,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:21,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 12:40:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342129261] [2023-04-01 12:40:21,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 12:40:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 12:40:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:40:21,590 INFO L87 Difference]: Start difference. First operand 5991 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) [2023-04-01 12:40:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:23,595 INFO L93 Difference]: Finished difference Result 10768 states and 15365 transitions. [2023-04-01 12:40:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 12:40:23,596 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 [2023-04-01 12:40:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:23,610 INFO L225 Difference]: With dead ends: 10768 [2023-04-01 12:40:23,610 INFO L226 Difference]: Without dead ends: 10766 [2023-04-01 12:40:23,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-04-01 12:40:23,613 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 560 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:23,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1103 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:40:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2023-04-01 12:40:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 5995. [2023-04-01 12:40:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5991 states have (on average 1.42747454515106) internal successors, (8552), 5991 states have internal predecessors, (8552), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 8555 transitions. [2023-04-01 12:40:24,366 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 8555 transitions. Word has length 62 [2023-04-01 12:40:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:24,366 INFO L495 AbstractCegarLoop]: Abstraction has 5995 states and 8555 transitions. [2023-04-01 12:40:24,366 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) [2023-04-01 12:40:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 8555 transitions. [2023-04-01 12:40:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:24,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:24,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:24,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:40:24,368 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:24,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash -914814013, now seen corresponding path program 1 times [2023-04-01 12:40:24,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:24,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599191955] [2023-04-01 12:40:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:24,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:25,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:25,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599191955] [2023-04-01 12:40:25,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599191955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:25,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:25,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:40:25,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366748391] [2023-04-01 12:40:25,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:25,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:40:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:40:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:40:25,377 INFO L87 Difference]: Start difference. First operand 5995 states and 8555 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:27,823 INFO L93 Difference]: Finished difference Result 8254 states and 11743 transitions. [2023-04-01 12:40:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 12:40:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:40:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:27,849 INFO L225 Difference]: With dead ends: 8254 [2023-04-01 12:40:27,849 INFO L226 Difference]: Without dead ends: 8252 [2023-04-01 12:40:27,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 12:40:27,851 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 967 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:27,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1313 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:40:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8252 states. [2023-04-01 12:40:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8252 to 5998. [2023-04-01 12:40:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 5994 states have (on average 1.4274274274274275) internal successors, (8556), 5994 states have internal predecessors, (8556), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 8559 transitions. [2023-04-01 12:40:28,580 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 8559 transitions. Word has length 62 [2023-04-01 12:40:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:28,581 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 8559 transitions. [2023-04-01 12:40:28,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 8559 transitions. [2023-04-01 12:40:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:40:28,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:28,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:40:28,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:28,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1400248285, now seen corresponding path program 1 times [2023-04-01 12:40:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857345009] [2023-04-01 12:40:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:29,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857345009] [2023-04-01 12:40:29,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857345009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:29,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:29,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:40:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17873530] [2023-04-01 12:40:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:29,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:40:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:40:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:40:29,670 INFO L87 Difference]: Start difference. First operand 5998 states and 8559 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:33,067 INFO L93 Difference]: Finished difference Result 11772 states and 16835 transitions. [2023-04-01 12:40:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 12:40:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 12:40:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:33,079 INFO L225 Difference]: With dead ends: 11772 [2023-04-01 12:40:33,079 INFO L226 Difference]: Without dead ends: 11770 [2023-04-01 12:40:33,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 12:40:33,082 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1122 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:33,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1773 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:40:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11770 states. [2023-04-01 12:40:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11770 to 6001. [2023-04-01 12:40:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6001 states, 5997 states have (on average 1.4272136068034016) internal successors, (8559), 5997 states have internal predecessors, (8559), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6001 states to 6001 states and 8562 transitions. [2023-04-01 12:40:33,898 INFO L78 Accepts]: Start accepts. Automaton has 6001 states and 8562 transitions. Word has length 62 [2023-04-01 12:40:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:33,898 INFO L495 AbstractCegarLoop]: Abstraction has 6001 states and 8562 transitions. [2023-04-01 12:40:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6001 states and 8562 transitions. [2023-04-01 12:40:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:40:33,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:33,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:33,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:40:33,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:33,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1357110332, now seen corresponding path program 1 times [2023-04-01 12:40:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:33,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818461799] [2023-04-01 12:40:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:33,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:33,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818461799] [2023-04-01 12:40:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818461799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:33,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:33,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351359565] [2023-04-01 12:40:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:33,937 INFO L87 Difference]: Start difference. First operand 6001 states and 8562 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) [2023-04-01 12:40:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:34,764 INFO L93 Difference]: Finished difference Result 9816 states and 14065 transitions. [2023-04-01 12:40:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:34,764 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 [2023-04-01 12:40:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:34,771 INFO L225 Difference]: With dead ends: 9816 [2023-04-01 12:40:34,771 INFO L226 Difference]: Without dead ends: 5814 [2023-04-01 12:40:34,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:34,777 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 [2023-04-01 12:40:34,777 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] [2023-04-01 12:40:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2023-04-01 12:40:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 5812. [2023-04-01 12:40:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5808 states have (on average 1.4245867768595042) internal successors, (8274), 5808 states have internal predecessors, (8274), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 8277 transitions. [2023-04-01 12:40:35,572 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 8277 transitions. Word has length 63 [2023-04-01 12:40:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:35,572 INFO L495 AbstractCegarLoop]: Abstraction has 5812 states and 8277 transitions. [2023-04-01 12:40:35,573 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) [2023-04-01 12:40:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 8277 transitions. [2023-04-01 12:40:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:40:35,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:35,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:40:35,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:35,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1276106631, now seen corresponding path program 1 times [2023-04-01 12:40:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:35,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844911258] [2023-04-01 12:40:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:35,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844911258] [2023-04-01 12:40:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844911258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:35,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168299222] [2023-04-01 12:40:35,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:35,610 INFO L87 Difference]: Start difference. First operand 5812 states and 8277 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) [2023-04-01 12:40:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:36,456 INFO L93 Difference]: Finished difference Result 11288 states and 16155 transitions. [2023-04-01 12:40:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:36,457 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 [2023-04-01 12:40:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:36,465 INFO L225 Difference]: With dead ends: 11288 [2023-04-01 12:40:36,465 INFO L226 Difference]: Without dead ends: 5658 [2023-04-01 12:40:36,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:36,477 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 [2023-04-01 12:40:36,477 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] [2023-04-01 12:40:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2023-04-01 12:40:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 5611. [2023-04-01 12:40:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5607 states have (on average 1.4228642767968611) internal successors, (7978), 5607 states have internal predecessors, (7978), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 7981 transitions. [2023-04-01 12:40:37,354 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 7981 transitions. Word has length 63 [2023-04-01 12:40:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:37,354 INFO L495 AbstractCegarLoop]: Abstraction has 5611 states and 7981 transitions. [2023-04-01 12:40:37,354 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) [2023-04-01 12:40:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 7981 transitions. [2023-04-01 12:40:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:40:37,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:37,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:37,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:40:37,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:37,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1041347384, now seen corresponding path program 1 times [2023-04-01 12:40:37,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:37,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925517527] [2023-04-01 12:40:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:37,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:37,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925517527] [2023-04-01 12:40:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925517527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:37,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914193100] [2023-04-01 12:40:37,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:37,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:37,416 INFO L87 Difference]: Start difference. First operand 5611 states and 7981 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) [2023-04-01 12:40:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:38,210 INFO L93 Difference]: Finished difference Result 9807 states and 13997 transitions. [2023-04-01 12:40:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:38,210 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 [2023-04-01 12:40:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:38,216 INFO L225 Difference]: With dead ends: 9807 [2023-04-01 12:40:38,216 INFO L226 Difference]: Without dead ends: 5369 [2023-04-01 12:40:38,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:38,221 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 115 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 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 [2023-04-01 12:40:38,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:40:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2023-04-01 12:40:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 5367. [2023-04-01 12:40:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5363 states have (on average 1.4202871527130339) internal successors, (7617), 5363 states have internal predecessors, (7617), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7620 transitions. [2023-04-01 12:40:39,010 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7620 transitions. Word has length 63 [2023-04-01 12:40:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7620 transitions. [2023-04-01 12:40:39,010 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) [2023-04-01 12:40:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7620 transitions. [2023-04-01 12:40:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:40:39,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:39,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:39,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:40:39,011 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:39,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1013213183, now seen corresponding path program 1 times [2023-04-01 12:40:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:39,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74151062] [2023-04-01 12:40:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:39,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:39,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74151062] [2023-04-01 12:40:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74151062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:39,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:39,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:40:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486560747] [2023-04-01 12:40:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:39,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:40:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:40:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:39,060 INFO L87 Difference]: Start difference. First operand 5367 states and 7620 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) [2023-04-01 12:40:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:39,862 INFO L93 Difference]: Finished difference Result 9487 states and 13520 transitions. [2023-04-01 12:40:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:40:39,862 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 [2023-04-01 12:40:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:39,868 INFO L225 Difference]: With dead ends: 9487 [2023-04-01 12:40:39,868 INFO L226 Difference]: Without dead ends: 5151 [2023-04-01 12:40:39,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:40:39,874 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 106 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 288 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 [2023-04-01 12:40:39,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 288 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:40:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2023-04-01 12:40:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5149. [2023-04-01 12:40:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5145 states have (on average 1.4184645286686104) internal successors, (7298), 5145 states have internal predecessors, (7298), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 7301 transitions. [2023-04-01 12:40:40,641 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 7301 transitions. Word has length 63 [2023-04-01 12:40:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:40,641 INFO L495 AbstractCegarLoop]: Abstraction has 5149 states and 7301 transitions. [2023-04-01 12:40:40,641 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) [2023-04-01 12:40:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 7301 transitions. [2023-04-01 12:40:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 12:40:40,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:40,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:40,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:40:40,642 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:40,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1490597416, now seen corresponding path program 1 times [2023-04-01 12:40:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723169956] [2023-04-01 12:40:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:40,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:42,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723169956] [2023-04-01 12:40:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723169956] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:40:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924346500] [2023-04-01 12:40:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:42,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:40:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:40:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:40:42,067 INFO L87 Difference]: Start difference. First operand 5149 states and 7301 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2023-04-01 12:40:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:40:44,247 INFO L93 Difference]: Finished difference Result 6095 states and 8614 transitions. [2023-04-01 12:40:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 12:40:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 [2023-04-01 12:40:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:40:44,254 INFO L225 Difference]: With dead ends: 6095 [2023-04-01 12:40:44,255 INFO L226 Difference]: Without dead ends: 6093 [2023-04-01 12:40:44,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=1290, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 12:40:44,257 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 733 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:40:44,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1416 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:40:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2023-04-01 12:40:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 5155. [2023-04-01 12:40:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5155 states, 5151 states have (on average 1.4181712288875947) internal successors, (7305), 5151 states have internal predecessors, (7305), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:40:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5155 states to 5155 states and 7308 transitions. [2023-04-01 12:40:45,028 INFO L78 Accepts]: Start accepts. Automaton has 5155 states and 7308 transitions. Word has length 64 [2023-04-01 12:40:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:40:45,028 INFO L495 AbstractCegarLoop]: Abstraction has 5155 states and 7308 transitions. [2023-04-01 12:40:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2023-04-01 12:40:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5155 states and 7308 transitions. [2023-04-01 12:40:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 12:40:45,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:40:45,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:40:45,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:40:45,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:40:45,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:40:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 290110648, now seen corresponding path program 1 times [2023-04-01 12:40:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:40:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932704904] [2023-04-01 12:40:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:40:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:40:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:40:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:40:47,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:40:47,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932704904] [2023-04-01 12:40:47,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932704904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:40:47,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:40:47,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-04-01 12:40:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702405881] [2023-04-01 12:40:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:40:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 12:40:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:40:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 12:40:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-04-01 12:40:47,166 INFO L87 Difference]: Start difference. First operand 5155 states and 7308 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)