/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:45:05,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:45:05,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:45:05,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:45:05,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:45:05,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:45:05,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:45:05,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:45:05,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:45:05,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:45:05,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:45:05,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:45:05,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:45:05,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:45:05,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:45:05,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:45:05,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:45:05,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:45:05,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:45:05,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:45:05,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:45:05,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:45:05,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:45:05,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:45:05,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:45:05,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:45:05,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:45:05,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:45:05,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:45:05,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:45:05,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:45:05,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:45:05,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:45:05,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:45:05,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:45:05,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:45:05,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:45:05,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:45:05,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:45:05,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:45:05,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:45:05,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:45:05,749 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:45:05,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:45:05,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:45:05,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:45:05,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:45:05,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:45:05,751 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:45:05,751 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:45:05,752 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:45:05,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:45:05,752 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:45:05,753 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:45:05,753 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:45:05,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:45:05,754 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:45:05,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:45:05,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:45:05,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:45:05,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:45:05,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:45:05,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:45:05,756 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:45:05,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:45:05,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:45:05,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:45:05,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:45:05,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:45:05,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:45:05,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:45:05,988 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:45:05,989 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:45:05,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:45:07,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:45:07,487 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:45:07,488 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:45:07,497 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ea39ec2b/3f97b23aafa143a2902472d8ccba1c11/FLAG29451f288 [2023-04-03 02:45:07,511 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ea39ec2b/3f97b23aafa143a2902472d8ccba1c11 [2023-04-03 02:45:07,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:45:07,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:45:07,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:45:07,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:45:07,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:45:07,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:07,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b44e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07, skipping insertion in model container [2023-04-03 02:45:07,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:07,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:45:07,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:45:07,745 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.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-04-03 02:45:07,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:45:07,809 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:45:07,887 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.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-04-03 02:45:07,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:45:07,950 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:45:07,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07 WrapperNode [2023-04-03 02:45:07,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:45:07,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:45:07,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:45:07,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:45:07,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:07,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:07,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:07,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:45:08,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:45:08,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:45:08,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:45:08,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (1/1) ... [2023-04-03 02:45:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:45:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:45:08,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:45:08,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:45:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:45:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:45:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:45:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:45:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:45:08,105 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:45:08,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:45:08,106 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:45:08,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:45:08,284 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:45:08,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:45:09,023 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:45:09,203 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:45:09,203 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:45:09,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:45:09 BoogieIcfgContainer [2023-04-03 02:45:09,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:45:09,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:45:09,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:45:09,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:45:09,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:45:07" (1/3) ... [2023-04-03 02:45:09,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b913bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:45:09, skipping insertion in model container [2023-04-03 02:45:09,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:45:07" (2/3) ... [2023-04-03 02:45:09,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b913bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:45:09, skipping insertion in model container [2023-04-03 02:45:09,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:45:09" (3/3) ... [2023-04-03 02:45:09,219 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:45:09,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:45:09,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:45:09,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:45:09,314 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;@6d91dd78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:45:09,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:45:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:45:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:45:09,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:09,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:09,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:09,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash -337454442, now seen corresponding path program 1 times [2023-04-03 02:45:09,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:09,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025768360] [2023-04-03 02:45:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:10,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025768360] [2023-04-03 02:45:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025768360] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:10,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:45:10,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489922625] [2023-04-03 02:45:10,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:10,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:45:10,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:45:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:10,090 INFO L87 Difference]: Start difference. First operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 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 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:10,514 INFO L93 Difference]: Finished difference Result 595 states and 942 transitions. [2023-04-03 02:45:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:45:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 72 [2023-04-03 02:45:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:10,532 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:45:10,532 INFO L226 Difference]: Without dead ends: 484 [2023-04-03 02:45:10,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:10,541 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 991 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:10,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1079 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-04-03 02:45:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 476. [2023-04-03 02:45:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.4046610169491525) internal successors, (663), 472 states have internal predecessors, (663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 666 transitions. [2023-04-03 02:45:10,672 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 666 transitions. Word has length 72 [2023-04-03 02:45:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:10,674 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 666 transitions. [2023-04-03 02:45:10,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 666 transitions. [2023-04-03 02:45:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:45:10,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:10,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:10,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:45:10,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:10,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash 896406262, now seen corresponding path program 1 times [2023-04-03 02:45:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311462840] [2023-04-03 02:45:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:10,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:10,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:10,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311462840] [2023-04-03 02:45:10,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311462840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:45:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460631035] [2023-04-03 02:45:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:45:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:45:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:45:10,914 INFO L87 Difference]: Start difference. First operand 476 states and 666 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:11,267 INFO L93 Difference]: Finished difference Result 1136 states and 1630 transitions. [2023-04-03 02:45:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:45:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-03 02:45:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:11,277 INFO L225 Difference]: With dead ends: 1136 [2023-04-03 02:45:11,277 INFO L226 Difference]: Without dead ends: 706 [2023-04-03 02:45:11,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:11,286 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 597 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:11,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-04-03 02:45:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2023-04-03 02:45:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.4285714285714286) internal successors, (1000), 700 states have internal predecessors, (1000), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1003 transitions. [2023-04-03 02:45:11,399 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1003 transitions. Word has length 73 [2023-04-03 02:45:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:11,400 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1003 transitions. [2023-04-03 02:45:11,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1003 transitions. [2023-04-03 02:45:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:45:11,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:11,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:11,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:45:11,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:11,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash -808924701, now seen corresponding path program 1 times [2023-04-03 02:45:11,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:11,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474813141] [2023-04-03 02:45:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:11,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:11,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474813141] [2023-04-03 02:45:11,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474813141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:11,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:11,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:45:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253705127] [2023-04-03 02:45:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:45:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:45:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:45:11,576 INFO L87 Difference]: Start difference. First operand 704 states and 1003 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:11,994 INFO L93 Difference]: Finished difference Result 1798 states and 2618 transitions. [2023-04-03 02:45:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:45:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-03 02:45:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:11,999 INFO L225 Difference]: With dead ends: 1798 [2023-04-03 02:45:11,999 INFO L226 Difference]: Without dead ends: 1209 [2023-04-03 02:45:12,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:12,001 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 558 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:12,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 255 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-04-03 02:45:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2023-04-03 02:45:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1203 states have (on average 1.4480465502909394) internal successors, (1742), 1203 states have internal predecessors, (1742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1745 transitions. [2023-04-03 02:45:12,184 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1745 transitions. Word has length 73 [2023-04-03 02:45:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:12,186 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1745 transitions. [2023-04-03 02:45:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1745 transitions. [2023-04-03 02:45:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:45:12,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:12,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:45:12,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:12,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1750533170, now seen corresponding path program 1 times [2023-04-03 02:45:12,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:12,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733016680] [2023-04-03 02:45:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:12,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:12,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733016680] [2023-04-03 02:45:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733016680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:12,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:12,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:45:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756911241] [2023-04-03 02:45:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:45:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:45:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:45:12,392 INFO L87 Difference]: Start difference. First operand 1207 states and 1745 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:12,933 INFO L93 Difference]: Finished difference Result 3273 states and 4807 transitions. [2023-04-03 02:45:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:45:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-03 02:45:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:12,942 INFO L225 Difference]: With dead ends: 3273 [2023-04-03 02:45:12,942 INFO L226 Difference]: Without dead ends: 2215 [2023-04-03 02:45:12,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:12,945 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 576 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:12,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 256 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-03 02:45:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2023-04-03 02:45:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2209 states have (on average 1.4594839293798099) internal successors, (3224), 2209 states have internal predecessors, (3224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3227 transitions. [2023-04-03 02:45:13,263 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3227 transitions. Word has length 73 [2023-04-03 02:45:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:13,264 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3227 transitions. [2023-04-03 02:45:13,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3227 transitions. [2023-04-03 02:45:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:45:13,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:13,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:45:13,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:13,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash -525507692, now seen corresponding path program 1 times [2023-04-03 02:45:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733549651] [2023-04-03 02:45:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:13,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733549651] [2023-04-03 02:45:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733549651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:13,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:13,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:45:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936345997] [2023-04-03 02:45:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:13,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:45:13,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:45:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:45:13,415 INFO L87 Difference]: Start difference. First operand 2213 states and 3227 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:14,225 INFO L93 Difference]: Finished difference Result 6355 states and 9343 transitions. [2023-04-03 02:45:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:45:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-03 02:45:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:14,240 INFO L225 Difference]: With dead ends: 6355 [2023-04-03 02:45:14,241 INFO L226 Difference]: Without dead ends: 4227 [2023-04-03 02:45:14,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:14,245 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 557 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:14,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 247 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2023-04-03 02:45:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2023-04-03 02:45:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4221 states have (on average 1.4593698175787728) internal successors, (6160), 4221 states have internal predecessors, (6160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 6163 transitions. [2023-04-03 02:45:14,754 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 6163 transitions. Word has length 73 [2023-04-03 02:45:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:14,755 INFO L495 AbstractCegarLoop]: Abstraction has 4225 states and 6163 transitions. [2023-04-03 02:45:14,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 6163 transitions. [2023-04-03 02:45:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:45:14,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:14,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:14,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:45:14,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:14,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 920424773, now seen corresponding path program 1 times [2023-04-03 02:45:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244240656] [2023-04-03 02:45:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:14,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244240656] [2023-04-03 02:45:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244240656] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:14,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:45:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439100527] [2023-04-03 02:45:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:45:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:45:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:45:14,899 INFO L87 Difference]: Start difference. First operand 4225 states and 6163 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:16,087 INFO L93 Difference]: Finished difference Result 12414 states and 18188 transitions. [2023-04-03 02:45:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:45:16,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-03 02:45:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:16,117 INFO L225 Difference]: With dead ends: 12414 [2023-04-03 02:45:16,117 INFO L226 Difference]: Without dead ends: 8251 [2023-04-03 02:45:16,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:45:16,126 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 562 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:16,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 239 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:45:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2023-04-03 02:45:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8249. [2023-04-03 02:45:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8249 states, 8245 states have (on average 1.4516676773802304) internal successors, (11969), 8245 states have internal predecessors, (11969), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 11972 transitions. [2023-04-03 02:45:17,236 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 11972 transitions. Word has length 73 [2023-04-03 02:45:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:17,237 INFO L495 AbstractCegarLoop]: Abstraction has 8249 states and 11972 transitions. [2023-04-03 02:45:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 11972 transitions. [2023-04-03 02:45:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:45:17,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:17,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:45:17,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:17,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 361009291, now seen corresponding path program 1 times [2023-04-03 02:45:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441769557] [2023-04-03 02:45:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:18,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:18,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441769557] [2023-04-03 02:45:18,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441769557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:18,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:18,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:45:18,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591042017] [2023-04-03 02:45:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:18,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:45:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:45:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:45:18,935 INFO L87 Difference]: Start difference. First operand 8249 states and 11972 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:22,609 INFO L93 Difference]: Finished difference Result 21198 states and 30747 transitions. [2023-04-03 02:45:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:45:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:45:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:22,671 INFO L225 Difference]: With dead ends: 21198 [2023-04-03 02:45:22,672 INFO L226 Difference]: Without dead ends: 21196 [2023-04-03 02:45:22,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:45:22,682 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1612 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:22,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 1058 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:45:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2023-04-03 02:45:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 16320. [2023-04-03 02:45:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16320 states, 16316 states have (on average 1.4463716597205198) internal successors, (23599), 16316 states have internal predecessors, (23599), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16320 states to 16320 states and 23602 transitions. [2023-04-03 02:45:24,869 INFO L78 Accepts]: Start accepts. Automaton has 16320 states and 23602 transitions. Word has length 74 [2023-04-03 02:45:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:24,869 INFO L495 AbstractCegarLoop]: Abstraction has 16320 states and 23602 transitions. [2023-04-03 02:45:24,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 16320 states and 23602 transitions. [2023-04-03 02:45:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:45:24,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:24,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:24,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:45:24,871 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:24,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:24,871 INFO L85 PathProgramCache]: Analyzing trace with hash 565900715, now seen corresponding path program 1 times [2023-04-03 02:45:24,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:24,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519675566] [2023-04-03 02:45:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:24,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:26,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519675566] [2023-04-03 02:45:26,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519675566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:26,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:26,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:45:26,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114684504] [2023-04-03 02:45:26,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:26,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:45:26,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:26,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:45:26,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:45:26,936 INFO L87 Difference]: Start difference. First operand 16320 states and 23602 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:32,775 INFO L93 Difference]: Finished difference Result 31736 states and 45894 transitions. [2023-04-03 02:45:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:45:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 74 [2023-04-03 02:45:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:32,850 INFO L225 Difference]: With dead ends: 31736 [2023-04-03 02:45:32,850 INFO L226 Difference]: Without dead ends: 29718 [2023-04-03 02:45:32,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:45:32,868 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1357 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:32,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 2286 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:45:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29718 states. [2023-04-03 02:45:35,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29718 to 16350. [2023-04-03 02:45:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16346 states have (on average 1.4460418450997186) internal successors, (23637), 16346 states have internal predecessors, (23637), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 23640 transitions. [2023-04-03 02:45:35,469 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 23640 transitions. Word has length 74 [2023-04-03 02:45:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:35,469 INFO L495 AbstractCegarLoop]: Abstraction has 16350 states and 23640 transitions. [2023-04-03 02:45:35,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 23640 transitions. [2023-04-03 02:45:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:45:35,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:35,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:45:35,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:35,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 651641355, now seen corresponding path program 1 times [2023-04-03 02:45:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:35,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509935416] [2023-04-03 02:45:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:36,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509935416] [2023-04-03 02:45:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509935416] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:36,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:36,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:45:36,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902383899] [2023-04-03 02:45:36,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:45:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:45:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:45:36,778 INFO L87 Difference]: Start difference. First operand 16350 states and 23640 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:40,081 INFO L93 Difference]: Finished difference Result 19676 states and 28343 transitions. [2023-04-03 02:45:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:45:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:45:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:40,136 INFO L225 Difference]: With dead ends: 19676 [2023-04-03 02:45:40,137 INFO L226 Difference]: Without dead ends: 19674 [2023-04-03 02:45:40,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:45:40,151 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1125 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:40,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1783 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:45:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19674 states. [2023-04-03 02:45:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19674 to 16368. [2023-04-03 02:45:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16368 states, 16364 states have (on average 1.445673429479345) internal successors, (23657), 16364 states have internal predecessors, (23657), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16368 states to 16368 states and 23660 transitions. [2023-04-03 02:45:42,623 INFO L78 Accepts]: Start accepts. Automaton has 16368 states and 23660 transitions. Word has length 74 [2023-04-03 02:45:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:42,624 INFO L495 AbstractCegarLoop]: Abstraction has 16368 states and 23660 transitions. [2023-04-03 02:45:42,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 16368 states and 23660 transitions. [2023-04-03 02:45:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:45:42,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:42,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:42,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:45:42,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:42,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash -633444021, now seen corresponding path program 1 times [2023-04-03 02:45:42,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:42,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217182262] [2023-04-03 02:45:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:42,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:43,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217182262] [2023-04-03 02:45:43,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217182262] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:43,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:43,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:45:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98360411] [2023-04-03 02:45:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:43,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:45:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:45:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:45:43,835 INFO L87 Difference]: Start difference. First operand 16368 states and 23660 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:48,085 INFO L93 Difference]: Finished difference Result 24011 states and 34669 transitions. [2023-04-03 02:45:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:45:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:45:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:48,141 INFO L225 Difference]: With dead ends: 24011 [2023-04-03 02:45:48,141 INFO L226 Difference]: Without dead ends: 24009 [2023-04-03 02:45:48,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:45:48,155 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1024 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:48,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 2355 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:45:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24009 states. [2023-04-03 02:45:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24009 to 16390. [2023-04-03 02:45:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16390 states, 16386 states have (on average 1.4453802026119857) internal successors, (23684), 16386 states have internal predecessors, (23684), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 23687 transitions. [2023-04-03 02:45:50,766 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 23687 transitions. Word has length 74 [2023-04-03 02:45:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:50,766 INFO L495 AbstractCegarLoop]: Abstraction has 16390 states and 23687 transitions. [2023-04-03 02:45:50,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 23687 transitions. [2023-04-03 02:45:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:45:50,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:50,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:50,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:45:50,768 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:50,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 649698539, now seen corresponding path program 1 times [2023-04-03 02:45:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:50,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439381064] [2023-04-03 02:45:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:45:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:45:51,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:45:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439381064] [2023-04-03 02:45:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439381064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:45:51,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:45:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:45:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886767932] [2023-04-03 02:45:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:45:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:45:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:45:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:45:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:45:51,949 INFO L87 Difference]: Start difference. First operand 16390 states and 23687 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:45:56,475 INFO L93 Difference]: Finished difference Result 26747 states and 38657 transitions. [2023-04-03 02:45:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:45:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 02:45:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:45:56,531 INFO L225 Difference]: With dead ends: 26747 [2023-04-03 02:45:56,531 INFO L226 Difference]: Without dead ends: 26745 [2023-04-03 02:45:56,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:45:56,543 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1155 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:45:56,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 1757 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:45:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2023-04-03 02:45:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 16416. [2023-04-03 02:45:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16416 states, 16412 states have (on average 1.4451011455032903) internal successors, (23717), 16412 states have internal predecessors, (23717), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16416 states to 16416 states and 23720 transitions. [2023-04-03 02:45:59,078 INFO L78 Accepts]: Start accepts. Automaton has 16416 states and 23720 transitions. Word has length 74 [2023-04-03 02:45:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:45:59,079 INFO L495 AbstractCegarLoop]: Abstraction has 16416 states and 23720 transitions. [2023-04-03 02:45:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:45:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16416 states and 23720 transitions. [2023-04-03 02:45:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:45:59,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:45:59,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:45:59,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:45:59,080 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:45:59,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:45:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1774649952, now seen corresponding path program 1 times [2023-04-03 02:45:59,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:45:59,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454083062] [2023-04-03 02:45:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:45:59,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:45:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:46:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:46:00,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:46:00,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454083062] [2023-04-03 02:46:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454083062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:46:00,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:46:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:46:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568934332] [2023-04-03 02:46:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:46:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:46:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:46:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:46:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:46:00,294 INFO L87 Difference]: Start difference. First operand 16416 states and 23720 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:46:06,065 INFO L93 Difference]: Finished difference Result 36869 states and 53253 transitions. [2023-04-03 02:46:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:46:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:46:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:46:06,131 INFO L225 Difference]: With dead ends: 36869 [2023-04-03 02:46:06,132 INFO L226 Difference]: Without dead ends: 32771 [2023-04-03 02:46:06,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:46:06,154 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 859 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:46:06,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 1925 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:46:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32771 states. [2023-04-03 02:46:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32771 to 21797. [2023-04-03 02:46:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21797 states, 21793 states have (on average 1.439131831321984) internal successors, (31363), 21793 states have internal predecessors, (31363), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21797 states to 21797 states and 31366 transitions. [2023-04-03 02:46:09,962 INFO L78 Accepts]: Start accepts. Automaton has 21797 states and 31366 transitions. Word has length 76 [2023-04-03 02:46:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:46:09,962 INFO L495 AbstractCegarLoop]: Abstraction has 21797 states and 31366 transitions. [2023-04-03 02:46:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21797 states and 31366 transitions. [2023-04-03 02:46:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:46:09,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:46:09,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:46:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:46:09,964 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:46:09,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:46:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1860390592, now seen corresponding path program 1 times [2023-04-03 02:46:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:46:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515864368] [2023-04-03 02:46:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:46:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:46:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:46:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:46:11,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:46:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515864368] [2023-04-03 02:46:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515864368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:46:11,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:46:11,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:46:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764316973] [2023-04-03 02:46:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:46:11,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:46:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:46:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:46:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:46:11,213 INFO L87 Difference]: Start difference. First operand 21797 states and 31366 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:46:19,458 INFO L93 Difference]: Finished difference Result 43091 states and 61972 transitions. [2023-04-03 02:46:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-03 02:46:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:46:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:46:19,523 INFO L225 Difference]: With dead ends: 43091 [2023-04-03 02:46:19,524 INFO L226 Difference]: Without dead ends: 43089 [2023-04-03 02:46:19,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:46:19,536 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1395 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:46:19,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 2147 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:46:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43089 states. [2023-04-03 02:46:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43089 to 23379. [2023-04-03 02:46:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23379 states, 23375 states have (on average 1.4399144385026739) internal successors, (33658), 23375 states have internal predecessors, (33658), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23379 states to 23379 states and 33661 transitions. [2023-04-03 02:46:23,894 INFO L78 Accepts]: Start accepts. Automaton has 23379 states and 33661 transitions. Word has length 76 [2023-04-03 02:46:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:46:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 23379 states and 33661 transitions. [2023-04-03 02:46:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23379 states and 33661 transitions. [2023-04-03 02:46:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:46:23,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:46:23,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:46:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:46:23,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:46:23,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:46:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 575305216, now seen corresponding path program 1 times [2023-04-03 02:46:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:46:23,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256228246] [2023-04-03 02:46:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:46:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:46:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:46:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:46:25,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:46:25,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256228246] [2023-04-03 02:46:25,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256228246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:46:25,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:46:25,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:46:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498660643] [2023-04-03 02:46:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:46:25,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:46:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:46:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:46:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:46:25,080 INFO L87 Difference]: Start difference. First operand 23379 states and 33661 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:46:33,766 INFO L93 Difference]: Finished difference Result 47377 states and 68202 transitions. [2023-04-03 02:46:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:46:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:46:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:46:33,853 INFO L225 Difference]: With dead ends: 47377 [2023-04-03 02:46:33,854 INFO L226 Difference]: Without dead ends: 47375 [2023-04-03 02:46:33,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:46:33,872 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 1015 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:46:33,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1759 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:46:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47375 states. [2023-04-03 02:46:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47375 to 23386. [2023-04-03 02:46:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23386 states, 23382 states have (on average 1.439868274741254) internal successors, (33667), 23382 states have internal predecessors, (33667), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23386 states to 23386 states and 33670 transitions. [2023-04-03 02:46:38,362 INFO L78 Accepts]: Start accepts. Automaton has 23386 states and 33670 transitions. Word has length 76 [2023-04-03 02:46:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:46:38,362 INFO L495 AbstractCegarLoop]: Abstraction has 23386 states and 33670 transitions. [2023-04-03 02:46:38,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23386 states and 33670 transitions. [2023-04-03 02:46:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:46:38,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:46:38,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:46:38,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:46:38,364 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:46:38,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:46:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1858447776, now seen corresponding path program 1 times [2023-04-03 02:46:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:46:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012058009] [2023-04-03 02:46:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:46:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:46:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:46:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:46:39,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:46:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012058009] [2023-04-03 02:46:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012058009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:46:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:46:39,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:46:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221425955] [2023-04-03 02:46:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:46:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:46:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:46:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:46:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:46:39,653 INFO L87 Difference]: Start difference. First operand 23386 states and 33670 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:46:48,129 INFO L93 Difference]: Finished difference Result 40265 states and 58008 transitions. [2023-04-03 02:46:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:46:48,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:46:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:46:48,194 INFO L225 Difference]: With dead ends: 40265 [2023-04-03 02:46:48,195 INFO L226 Difference]: Without dead ends: 40263 [2023-04-03 02:46:48,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:46:48,207 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1049 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:46:48,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 2391 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:46:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40263 states. [2023-04-03 02:46:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40263 to 23376. [2023-04-03 02:46:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23376 states, 23372 states have (on average 1.439928119116892) internal successors, (33654), 23372 states have internal predecessors, (33654), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23376 states to 23376 states and 33657 transitions. [2023-04-03 02:46:52,772 INFO L78 Accepts]: Start accepts. Automaton has 23376 states and 33657 transitions. Word has length 76 [2023-04-03 02:46:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:46:52,772 INFO L495 AbstractCegarLoop]: Abstraction has 23376 states and 33657 transitions. [2023-04-03 02:46:52,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:46:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 23376 states and 33657 transitions. [2023-04-03 02:46:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:46:52,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:46:52,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:46:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:46:52,774 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:46:52,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:46:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1192553440, now seen corresponding path program 1 times [2023-04-03 02:46:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:46:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358351944] [2023-04-03 02:46:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:46:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:46:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:46:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:46:54,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:46:54,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358351944] [2023-04-03 02:46:54,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358351944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:46:54,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:46:54,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:46:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696629682] [2023-04-03 02:46:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:46:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:46:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:46:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:46:54,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:46:54,638 INFO L87 Difference]: Start difference. First operand 23376 states and 33657 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:01,526 INFO L93 Difference]: Finished difference Result 28696 states and 41199 transitions. [2023-04-03 02:47:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:47:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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 76 [2023-04-03 02:47:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:01,573 INFO L225 Difference]: With dead ends: 28696 [2023-04-03 02:47:01,574 INFO L226 Difference]: Without dead ends: 28694 [2023-04-03 02:47:01,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:47:01,585 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 1386 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:01,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 1578 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:47:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28694 states. [2023-04-03 02:47:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28694 to 24420. [2023-04-03 02:47:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24420 states, 24416 states have (on average 1.438442005242464) internal successors, (35121), 24416 states have internal predecessors, (35121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24420 states to 24420 states and 35124 transitions. [2023-04-03 02:47:06,238 INFO L78 Accepts]: Start accepts. Automaton has 24420 states and 35124 transitions. Word has length 76 [2023-04-03 02:47:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:06,239 INFO L495 AbstractCegarLoop]: Abstraction has 24420 states and 35124 transitions. [2023-04-03 02:47:06,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24420 states and 35124 transitions. [2023-04-03 02:47:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:47:06,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:06,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:47:06,240 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:06,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -412243168, now seen corresponding path program 1 times [2023-04-03 02:47:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:06,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560818190] [2023-04-03 02:47:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:07,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560818190] [2023-04-03 02:47:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560818190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:07,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:47:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701927655] [2023-04-03 02:47:07,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:47:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:47:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:47:07,465 INFO L87 Difference]: Start difference. First operand 24420 states and 35124 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:13,704 INFO L93 Difference]: Finished difference Result 31729 states and 45565 transitions. [2023-04-03 02:47:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:47:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:47:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:13,749 INFO L225 Difference]: With dead ends: 31729 [2023-04-03 02:47:13,749 INFO L226 Difference]: Without dead ends: 29679 [2023-04-03 02:47:13,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:47:13,763 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1079 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:13,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 2032 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:47:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29679 states. [2023-04-03 02:47:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29679 to 24432. [2023-04-03 02:47:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24432 states, 24428 states have (on average 1.4383084984444081) internal successors, (35135), 24428 states have internal predecessors, (35135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24432 states to 24432 states and 35138 transitions. [2023-04-03 02:47:18,532 INFO L78 Accepts]: Start accepts. Automaton has 24432 states and 35138 transitions. Word has length 76 [2023-04-03 02:47:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:18,532 INFO L495 AbstractCegarLoop]: Abstraction has 24432 states and 35138 transitions. [2023-04-03 02:47:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 24432 states and 35138 transitions. [2023-04-03 02:47:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:47:18,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:18,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:18,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:47:18,533 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:18,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -326502528, now seen corresponding path program 1 times [2023-04-03 02:47:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130475943] [2023-04-03 02:47:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:19,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130475943] [2023-04-03 02:47:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130475943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:19,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:47:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404997960] [2023-04-03 02:47:19,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:47:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:47:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:47:19,681 INFO L87 Difference]: Start difference. First operand 24432 states and 35138 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:27,642 INFO L93 Difference]: Finished difference Result 37934 states and 54508 transitions. [2023-04-03 02:47:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:47:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:47:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:27,704 INFO L225 Difference]: With dead ends: 37934 [2023-04-03 02:47:27,704 INFO L226 Difference]: Without dead ends: 37932 [2023-04-03 02:47:27,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:47:27,716 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1067 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:27,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 2731 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:47:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37932 states. [2023-04-03 02:47:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37932 to 24437. [2023-04-03 02:47:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24437 states, 24433 states have (on average 1.4383006589448697) internal successors, (35142), 24433 states have internal predecessors, (35142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24437 states to 24437 states and 35145 transitions. [2023-04-03 02:47:32,668 INFO L78 Accepts]: Start accepts. Automaton has 24437 states and 35145 transitions. Word has length 76 [2023-04-03 02:47:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:32,669 INFO L495 AbstractCegarLoop]: Abstraction has 24437 states and 35145 transitions. [2023-04-03 02:47:32,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24437 states and 35145 transitions. [2023-04-03 02:47:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:47:32,670 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:32,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:47:32,670 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:32,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:32,671 INFO L85 PathProgramCache]: Analyzing trace with hash 32143040, now seen corresponding path program 1 times [2023-04-03 02:47:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844124284] [2023-04-03 02:47:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:33,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:33,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844124284] [2023-04-03 02:47:33,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844124284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:33,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:33,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:47:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619779446] [2023-04-03 02:47:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:33,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:47:33,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:47:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:47:33,694 INFO L87 Difference]: Start difference. First operand 24437 states and 35145 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:42,221 INFO L93 Difference]: Finished difference Result 44214 states and 63594 transitions. [2023-04-03 02:47:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:47:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:47:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:42,282 INFO L225 Difference]: With dead ends: 44214 [2023-04-03 02:47:42,283 INFO L226 Difference]: Without dead ends: 40116 [2023-04-03 02:47:42,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:47:42,302 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1124 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:42,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1329 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:47:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40116 states. [2023-04-03 02:47:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40116 to 24474. [2023-04-03 02:47:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24474 states, 24470 states have (on average 1.4380057212913773) internal successors, (35188), 24470 states have internal predecessors, (35188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24474 states to 24474 states and 35191 transitions. [2023-04-03 02:47:47,567 INFO L78 Accepts]: Start accepts. Automaton has 24474 states and 35191 transitions. Word has length 76 [2023-04-03 02:47:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:47,567 INFO L495 AbstractCegarLoop]: Abstraction has 24474 states and 35191 transitions. [2023-04-03 02:47:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 24474 states and 35191 transitions. [2023-04-03 02:47:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:47:47,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:47,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:47:47,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:47,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 117883680, now seen corresponding path program 1 times [2023-04-03 02:47:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202611719] [2023-04-03 02:47:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:47:48,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202611719] [2023-04-03 02:47:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202611719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:48,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:47:48,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733934559] [2023-04-03 02:47:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:48,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:47:48,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:47:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:47:48,567 INFO L87 Difference]: Start difference. First operand 24474 states and 35191 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:58,029 INFO L93 Difference]: Finished difference Result 41563 states and 59694 transitions. [2023-04-03 02:47:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:47:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:47:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:58,091 INFO L225 Difference]: With dead ends: 41563 [2023-04-03 02:47:58,092 INFO L226 Difference]: Without dead ends: 41561 [2023-04-03 02:47:58,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:47:58,104 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1274 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:58,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 2104 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:47:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41561 states. [2023-04-03 02:48:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41561 to 24477. [2023-04-03 02:48:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24477 states, 24473 states have (on average 1.4379520287663956) internal successors, (35191), 24473 states have internal predecessors, (35191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24477 states to 24477 states and 35194 transitions. [2023-04-03 02:48:03,624 INFO L78 Accepts]: Start accepts. Automaton has 24477 states and 35194 transitions. Word has length 76 [2023-04-03 02:48:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:03,624 INFO L495 AbstractCegarLoop]: Abstraction has 24477 states and 35194 transitions. [2023-04-03 02:48:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24477 states and 35194 transitions. [2023-04-03 02:48:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:48:03,626 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:03,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:48:03,626 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:03,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1167201696, now seen corresponding path program 1 times [2023-04-03 02:48:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741220147] [2023-04-03 02:48:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:03,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:04,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741220147] [2023-04-03 02:48:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741220147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:04,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:04,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:48:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284212141] [2023-04-03 02:48:04,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:48:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:48:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:48:04,670 INFO L87 Difference]: Start difference. First operand 24477 states and 35194 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:13,389 INFO L93 Difference]: Finished difference Result 37018 states and 53195 transitions. [2023-04-03 02:48:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:48:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:48:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:13,449 INFO L225 Difference]: With dead ends: 37018 [2023-04-03 02:48:13,449 INFO L226 Difference]: Without dead ends: 37016 [2023-04-03 02:48:13,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:48:13,462 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1113 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:13,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 2534 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:48:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37016 states. [2023-04-03 02:48:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37016 to 24474. [2023-04-03 02:48:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24474 states, 24470 states have (on average 1.4379648549243973) internal successors, (35187), 24470 states have internal predecessors, (35187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24474 states to 24474 states and 35190 transitions. [2023-04-03 02:48:18,859 INFO L78 Accepts]: Start accepts. Automaton has 24474 states and 35190 transitions. Word has length 76 [2023-04-03 02:48:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:18,859 INFO L495 AbstractCegarLoop]: Abstraction has 24474 states and 35190 transitions. [2023-04-03 02:48:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24474 states and 35190 transitions. [2023-04-03 02:48:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:48:18,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:18,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:18,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:48:18,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:18,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1101905495, now seen corresponding path program 1 times [2023-04-03 02:48:18,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810783292] [2023-04-03 02:48:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:18,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:18,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810783292] [2023-04-03 02:48:18,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810783292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:18,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:18,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:48:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806740336] [2023-04-03 02:48:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:48:18,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:48:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:18,905 INFO L87 Difference]: Start difference. First operand 24474 states and 35190 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:24,196 INFO L93 Difference]: Finished difference Result 43326 states and 62434 transitions. [2023-04-03 02:48:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:48:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:48:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:24,233 INFO L225 Difference]: With dead ends: 43326 [2023-04-03 02:48:24,234 INFO L226 Difference]: Without dead ends: 23780 [2023-04-03 02:48:24,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:24,262 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 150 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:24,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 376 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:48:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23780 states. [2023-04-03 02:48:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23780 to 23778. [2023-04-03 02:48:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23778 states, 23774 states have (on average 1.4362749221838984) internal successors, (34146), 23774 states have internal predecessors, (34146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23778 states to 23778 states and 34149 transitions. [2023-04-03 02:48:29,563 INFO L78 Accepts]: Start accepts. Automaton has 23778 states and 34149 transitions. Word has length 77 [2023-04-03 02:48:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:29,563 INFO L495 AbstractCegarLoop]: Abstraction has 23778 states and 34149 transitions. [2023-04-03 02:48:29,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 23778 states and 34149 transitions. [2023-04-03 02:48:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:48:29,565 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:29,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:48:29,565 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:29,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash -328925582, now seen corresponding path program 1 times [2023-04-03 02:48:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:29,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058220615] [2023-04-03 02:48:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:29,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:29,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058220615] [2023-04-03 02:48:29,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058220615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:29,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:29,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:48:29,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977574824] [2023-04-03 02:48:29,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:48:29,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:48:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:29,614 INFO L87 Difference]: Start difference. First operand 23778 states and 34149 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:34,935 INFO L93 Difference]: Finished difference Result 45723 states and 65871 transitions. [2023-04-03 02:48:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:48:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:48:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:34,970 INFO L225 Difference]: With dead ends: 45723 [2023-04-03 02:48:34,970 INFO L226 Difference]: Without dead ends: 23231 [2023-04-03 02:48:34,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:34,997 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 138 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:34,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 374 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:48:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23231 states. [2023-04-03 02:48:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23231 to 23082. [2023-04-03 02:48:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23082 states, 23078 states have (on average 1.4343097322124967) internal successors, (33101), 23078 states have internal predecessors, (33101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 33104 transitions. [2023-04-03 02:48:40,217 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 33104 transitions. Word has length 77 [2023-04-03 02:48:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:40,217 INFO L495 AbstractCegarLoop]: Abstraction has 23082 states and 33104 transitions. [2023-04-03 02:48:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 33104 transitions. [2023-04-03 02:48:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:48:40,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:40,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:48:40,219 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:40,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash 248996399, now seen corresponding path program 1 times [2023-04-03 02:48:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009722802] [2023-04-03 02:48:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:40,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:40,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009722802] [2023-04-03 02:48:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009722802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:40,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:48:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579518584] [2023-04-03 02:48:40,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:48:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:48:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:40,268 INFO L87 Difference]: Start difference. First operand 23082 states and 33104 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:45,398 INFO L93 Difference]: Finished difference Result 41882 states and 60212 transitions. [2023-04-03 02:48:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:48:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:48:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:45,431 INFO L225 Difference]: With dead ends: 41882 [2023-04-03 02:48:45,431 INFO L226 Difference]: Without dead ends: 22372 [2023-04-03 02:48:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:45,450 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 136 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:45,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 376 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:48:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22372 states. [2023-04-03 02:48:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22372 to 22370. [2023-04-03 02:48:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22370 states, 22366 states have (on average 1.4324868103371189) internal successors, (32039), 22366 states have internal predecessors, (32039), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22370 states to 22370 states and 32042 transitions. [2023-04-03 02:48:50,560 INFO L78 Accepts]: Start accepts. Automaton has 22370 states and 32042 transitions. Word has length 77 [2023-04-03 02:48:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:50,560 INFO L495 AbstractCegarLoop]: Abstraction has 22370 states and 32042 transitions. [2023-04-03 02:48:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22370 states and 32042 transitions. [2023-04-03 02:48:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:48:50,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:50,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:48:50,562 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:50,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash 968592876, now seen corresponding path program 1 times [2023-04-03 02:48:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:50,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633244827] [2023-04-03 02:48:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:50,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:50,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633244827] [2023-04-03 02:48:50,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633244827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:50,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:50,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:48:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630690819] [2023-04-03 02:48:50,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:48:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:48:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:50,611 INFO L87 Difference]: Start difference. First operand 22370 states and 32042 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:55,309 INFO L93 Difference]: Finished difference Result 39679 states and 57001 transitions. [2023-04-03 02:48:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:48:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:48:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:55,340 INFO L225 Difference]: With dead ends: 39679 [2023-04-03 02:48:55,340 INFO L226 Difference]: Without dead ends: 20301 [2023-04-03 02:48:55,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:48:55,363 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 135 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:55,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 368 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:48:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20301 states. [2023-04-03 02:49:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20301 to 20299. [2023-04-03 02:49:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20299 states, 20295 states have (on average 1.4299581177629959) internal successors, (29021), 20295 states have internal predecessors, (29021), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20299 states to 20299 states and 29024 transitions. [2023-04-03 02:49:00,111 INFO L78 Accepts]: Start accepts. Automaton has 20299 states and 29024 transitions. Word has length 77 [2023-04-03 02:49:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:00,111 INFO L495 AbstractCegarLoop]: Abstraction has 20299 states and 29024 transitions. [2023-04-03 02:49:00,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20299 states and 29024 transitions. [2023-04-03 02:49:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:49:00,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:00,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:00,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:49:00,113 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:00,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1135567019, now seen corresponding path program 1 times [2023-04-03 02:49:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984735930] [2023-04-03 02:49:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:00,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:02,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984735930] [2023-04-03 02:49:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984735930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:02,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:49:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949332846] [2023-04-03 02:49:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:02,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:49:02,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:49:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:49:02,149 INFO L87 Difference]: Start difference. First operand 20299 states and 29024 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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)