/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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:37:50,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:37:50,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:37:50,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:37:50,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:37:50,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:37:50,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:37:50,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:37:50,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:37:50,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:37:50,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:37:50,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:37:50,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:37:50,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:37:50,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:37:50,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:37:50,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:37:50,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:37:50,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:37:50,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:37:50,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:37:50,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:37:50,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:37:50,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:37:50,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:37:50,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:37:50,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:37:50,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:37:50,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:37:50,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:37:50,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:37:50,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:37:50,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:37:50,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:37:50,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:37:50,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:37:50,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:37:50,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:37:50,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:37:50,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:37:50,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:37:50,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:37:50,885 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:37:50,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:37:50,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:37:50,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:37:50,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:37:50,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:37:50,886 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:37:50,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:37:50,886 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:37:50,886 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:37:50,887 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:37:50,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:37:50,887 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:37:50,887 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:37:50,887 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:37:50,888 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:37:50,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:37:50,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:37:50,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:37:50,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:37:50,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:37:50,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:37:50,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:37:51,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:37:51,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:37:51,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:37:51,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:37:51,156 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:37:51,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:37:52,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:37:52,324 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:37:52,326 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:37:52,335 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6eb20968/0ee768f9d34549e7bb42c2c5778d5c70/FLAG6949cb23b [2023-04-01 06:37:52,349 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6eb20968/0ee768f9d34549e7bb42c2c5778d5c70 [2023-04-01 06:37:52,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:37:52,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:37:52,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:37:52,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:37:52,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:37:52,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28962372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52, skipping insertion in model container [2023-04-01 06:37:52,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:37:52,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:37:52,615 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2023-04-01 06:37:52,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:37:52,640 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:37:52,667 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4940,4953] [2023-04-01 06:37:52,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:37:52,691 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:37:52,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52 WrapperNode [2023-04-01 06:37:52,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:37:52,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:37:52,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:37:52,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:37:52,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:37:52,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:37:52,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:37:52,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:37:52,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (1/1) ... [2023-04-01 06:37:52,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:37:52,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:37:52,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:37:52,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:37:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:37:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:37:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:37:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:37:52,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:37:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:37:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:37:52,899 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:37:52,901 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:37:53,360 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:37:53,437 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:37:53,437 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:37:53,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:37:53 BoogieIcfgContainer [2023-04-01 06:37:53,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:37:53,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:37:53,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:37:53,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:37:53,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:37:52" (1/3) ... [2023-04-01 06:37:53,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1867c5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:37:53, skipping insertion in model container [2023-04-01 06:37:53,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:37:52" (2/3) ... [2023-04-01 06:37:53,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1867c5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:37:53, skipping insertion in model container [2023-04-01 06:37:53,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:37:53" (3/3) ... [2023-04-01 06:37:53,449 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:37:53,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:37:53,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:37:53,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:37:53,517 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;@3a4ada7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:37:53,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:37:53,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 60 states have (on average 1.7) internal successors, (102), 62 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:37:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 06:37:53,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:53,530 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] [2023-04-01 06:37:53,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:53,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash -796274295, now seen corresponding path program 1 times [2023-04-01 06:37:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:53,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524072566] [2023-04-01 06:37:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:53,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:53,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524072566] [2023-04-01 06:37:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524072566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494641926] [2023-04-01 06:37:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:53,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:53,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:53,937 INFO L87 Difference]: Start difference. First operand has 67 states, 60 states have (on average 1.7) internal successors, (102), 62 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:54,030 INFO L93 Difference]: Finished difference Result 139 states and 206 transitions. [2023-04-01 06:37:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 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 42 [2023-04-01 06:37:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:54,038 INFO L225 Difference]: With dead ends: 139 [2023-04-01 06:37:54,038 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 06:37:54,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,043 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 70 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:54,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 186 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 06:37:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-04-01 06:37:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2023-04-01 06:37:54,076 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 42 [2023-04-01 06:37:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:54,077 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2023-04-01 06:37:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2023-04-01 06:37:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 06:37:54,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:54,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:37:54,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:54,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1092586137, now seen corresponding path program 1 times [2023-04-01 06:37:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:54,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005716717] [2023-04-01 06:37:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:54,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005716717] [2023-04-01 06:37:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005716717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:54,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:54,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:54,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72547913] [2023-04-01 06:37:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:54,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,187 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:54,268 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2023-04-01 06:37:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 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 45 [2023-04-01 06:37:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:54,272 INFO L225 Difference]: With dead ends: 201 [2023-04-01 06:37:54,272 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 06:37:54,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,274 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:54,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 06:37:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2023-04-01 06:37:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.385185185185185) internal successors, (187), 135 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2023-04-01 06:37:54,300 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 45 [2023-04-01 06:37:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:54,301 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2023-04-01 06:37:54,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2023-04-01 06:37:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 06:37:54,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:54,302 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] [2023-04-01 06:37:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:37:54,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:54,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1298736687, now seen corresponding path program 1 times [2023-04-01 06:37:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109113162] [2023-04-01 06:37:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:54,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109113162] [2023-04-01 06:37:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109113162] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:54,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383136052] [2023-04-01 06:37:54,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:54,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,382 INFO L87 Difference]: Start difference. First operand 139 states and 190 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:54,439 INFO L93 Difference]: Finished difference Result 343 states and 488 transitions. [2023-04-01 06:37:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 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 48 [2023-04-01 06:37:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:54,446 INFO L225 Difference]: With dead ends: 343 [2023-04-01 06:37:54,446 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 06:37:54,450 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 [2023-04-01 06:37:54,453 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:54,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 06:37:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2023-04-01 06:37:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.4052863436123348) internal successors, (319), 227 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 322 transitions. [2023-04-01 06:37:54,518 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 322 transitions. Word has length 48 [2023-04-01 06:37:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:54,518 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 322 transitions. [2023-04-01 06:37:54,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 322 transitions. [2023-04-01 06:37:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 06:37:54,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:54,521 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] [2023-04-01 06:37:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:37:54,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:54,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 611192490, now seen corresponding path program 1 times [2023-04-01 06:37:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710985938] [2023-04-01 06:37:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:54,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710985938] [2023-04-01 06:37:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710985938] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:54,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100541678] [2023-04-01 06:37:54,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,627 INFO L87 Difference]: Start difference. First operand 231 states and 322 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:54,703 INFO L93 Difference]: Finished difference Result 603 states and 860 transitions. [2023-04-01 06:37:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 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 51 [2023-04-01 06:37:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:54,707 INFO L225 Difference]: With dead ends: 603 [2023-04-01 06:37:54,707 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 06:37:54,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:54,718 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:54,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 06:37:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2023-04-01 06:37:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 1.4050632911392404) internal successors, (555), 395 states have internal predecessors, (555), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 558 transitions. [2023-04-01 06:37:54,781 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 558 transitions. Word has length 51 [2023-04-01 06:37:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:54,781 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 558 transitions. [2023-04-01 06:37:54,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 558 transitions. [2023-04-01 06:37:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:37:54,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:54,784 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] [2023-04-01 06:37:54,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:37:54,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:54,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash -205487054, now seen corresponding path program 1 times [2023-04-01 06:37:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:54,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120195176] [2023-04-01 06:37:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:54,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:54,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:54,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120195176] [2023-04-01 06:37:54,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120195176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:54,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:54,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:37:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192899971] [2023-04-01 06:37:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:37:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:37:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:37:54,927 INFO L87 Difference]: Start difference. First operand 399 states and 558 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:55,212 INFO L93 Difference]: Finished difference Result 1609 states and 2283 transitions. [2023-04-01 06:37:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:37:55,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 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 54 [2023-04-01 06:37:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:55,218 INFO L225 Difference]: With dead ends: 1609 [2023-04-01 06:37:55,218 INFO L226 Difference]: Without dead ends: 1239 [2023-04-01 06:37:55,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:37:55,220 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 357 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:55,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 739 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-04-01 06:37:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 571. [2023-04-01 06:37:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 567 states have (on average 1.3932980599647267) internal successors, (790), 567 states have internal predecessors, (790), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 793 transitions. [2023-04-01 06:37:55,311 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 793 transitions. Word has length 54 [2023-04-01 06:37:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:55,313 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 793 transitions. [2023-04-01 06:37:55,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 793 transitions. [2023-04-01 06:37:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:37:55,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:55,315 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] [2023-04-01 06:37:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:37:55,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:55,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -797755891, now seen corresponding path program 1 times [2023-04-01 06:37:55,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264834718] [2023-04-01 06:37:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:55,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:55,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264834718] [2023-04-01 06:37:55,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264834718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:55,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:55,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:37:55,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963131106] [2023-04-01 06:37:55,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:55,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:37:55,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:55,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:37:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:55,408 INFO L87 Difference]: Start difference. First operand 571 states and 793 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:55,550 INFO L93 Difference]: Finished difference Result 1441 states and 2031 transitions. [2023-04-01 06:37:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:37:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 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 56 [2023-04-01 06:37:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:55,555 INFO L225 Difference]: With dead ends: 1441 [2023-04-01 06:37:55,555 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 06:37:55,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:37:55,557 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:55,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 06:37:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 06:37:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4042553191489362) internal successors, (1254), 893 states have internal predecessors, (1254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1257 transitions. [2023-04-01 06:37:55,684 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1257 transitions. Word has length 56 [2023-04-01 06:37:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:55,685 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1257 transitions. [2023-04-01 06:37:55,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1257 transitions. [2023-04-01 06:37:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:37:55,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:55,687 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] [2023-04-01 06:37:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:37:55,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:55,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -777706548, now seen corresponding path program 1 times [2023-04-01 06:37:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:55,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395537352] [2023-04-01 06:37:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:55,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:55,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395537352] [2023-04-01 06:37:55,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395537352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:55,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:55,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:37:55,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447057374] [2023-04-01 06:37:55,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:55,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:37:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:37:55,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:37:55,937 INFO L87 Difference]: Start difference. First operand 897 states and 1257 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:56,136 INFO L93 Difference]: Finished difference Result 1765 states and 2484 transitions. [2023-04-01 06:37:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:37:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 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 56 [2023-04-01 06:37:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:56,140 INFO L225 Difference]: With dead ends: 1765 [2023-04-01 06:37:56,140 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 06:37:56,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:37:56,143 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:56,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 06:37:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 06:37:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4020156774916013) internal successors, (1252), 893 states have internal predecessors, (1252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1255 transitions. [2023-04-01 06:37:56,242 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1255 transitions. Word has length 56 [2023-04-01 06:37:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:56,243 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1255 transitions. [2023-04-01 06:37:56,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1255 transitions. [2023-04-01 06:37:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:56,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:56,244 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] [2023-04-01 06:37:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:37:56,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:56,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1658991407, now seen corresponding path program 1 times [2023-04-01 06:37:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839228142] [2023-04-01 06:37:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:56,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839228142] [2023-04-01 06:37:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839228142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:56,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:56,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836322255] [2023-04-01 06:37:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:56,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:56,328 INFO L87 Difference]: Start difference. First operand 897 states and 1255 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:56,493 INFO L93 Difference]: Finished difference Result 1765 states and 2480 transitions. [2023-04-01 06:37:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 06:37:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:56,497 INFO L225 Difference]: With dead ends: 1765 [2023-04-01 06:37:56,497 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 06:37:56,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:56,499 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 265 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:56,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:37:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 06:37:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 06:37:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3840985442329228) internal successors, (1236), 893 states have internal predecessors, (1236), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1239 transitions. [2023-04-01 06:37:56,614 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1239 transitions. Word has length 57 [2023-04-01 06:37:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:56,615 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1239 transitions. [2023-04-01 06:37:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1239 transitions. [2023-04-01 06:37:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:56,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:56,615 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] [2023-04-01 06:37:56,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:37:56,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:56,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 896127700, now seen corresponding path program 1 times [2023-04-01 06:37:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885021138] [2023-04-01 06:37:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:56,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:56,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885021138] [2023-04-01 06:37:56,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885021138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:56,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:56,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243582012] [2023-04-01 06:37:56,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:56,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:56,681 INFO L87 Difference]: Start difference. First operand 897 states and 1239 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:56,841 INFO L93 Difference]: Finished difference Result 1763 states and 2447 transitions. [2023-04-01 06:37:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 06:37:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:56,844 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 06:37:56,845 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 06:37:56,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:56,847 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 169 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:56,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 06:37:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 06:37:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3617021276595744) internal successors, (1216), 893 states have internal predecessors, (1216), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1219 transitions. [2023-04-01 06:37:56,950 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1219 transitions. Word has length 57 [2023-04-01 06:37:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:56,951 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1219 transitions. [2023-04-01 06:37:56,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1219 transitions. [2023-04-01 06:37:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:56,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:56,951 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] [2023-04-01 06:37:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:37:56,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:56,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1024213007, now seen corresponding path program 1 times [2023-04-01 06:37:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619379289] [2023-04-01 06:37:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:57,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:57,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619379289] [2023-04-01 06:37:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619379289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:57,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:57,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970263531] [2023-04-01 06:37:57,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:57,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:57,024 INFO L87 Difference]: Start difference. First operand 897 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:57,216 INFO L93 Difference]: Finished difference Result 1763 states and 2407 transitions. [2023-04-01 06:37:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 06:37:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:57,220 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 06:37:57,220 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 06:37:57,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:57,222 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 153 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:57,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 06:37:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 06:37:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.343784994400896) internal successors, (1200), 893 states have internal predecessors, (1200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1203 transitions. [2023-04-01 06:37:57,341 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1203 transitions. Word has length 57 [2023-04-01 06:37:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:57,341 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1203 transitions. [2023-04-01 06:37:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1203 transitions. [2023-04-01 06:37:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:57,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:57,342 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] [2023-04-01 06:37:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:37:57,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:57,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1889745396, now seen corresponding path program 1 times [2023-04-01 06:37:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:57,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809636851] [2023-04-01 06:37:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:57,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809636851] [2023-04-01 06:37:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809636851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:57,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:57,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707802673] [2023-04-01 06:37:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:57,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:57,431 INFO L87 Difference]: Start difference. First operand 897 states and 1203 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:57,593 INFO L93 Difference]: Finished difference Result 1763 states and 2375 transitions. [2023-04-01 06:37:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:37:57,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 06:37:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:57,596 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 06:37:57,596 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 06:37:57,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:37:57,600 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:57,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 06:37:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 06:37:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3281075027995521) internal successors, (1186), 893 states have internal predecessors, (1186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1189 transitions. [2023-04-01 06:37:57,723 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1189 transitions. Word has length 57 [2023-04-01 06:37:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:57,724 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1189 transitions. [2023-04-01 06:37:57,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1189 transitions. [2023-04-01 06:37:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:37:57,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:57,728 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] [2023-04-01 06:37:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:37:57,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:57,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1360454895, now seen corresponding path program 1 times [2023-04-01 06:37:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133793434] [2023-04-01 06:37:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:37:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:37:57,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:37:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133793434] [2023-04-01 06:37:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133793434] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:37:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:37:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:37:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070690831] [2023-04-01 06:37:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:37:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:37:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:37:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:37:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:37:57,874 INFO L87 Difference]: Start difference. First operand 897 states and 1189 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:37:58,144 INFO L93 Difference]: Finished difference Result 1448 states and 1903 transitions. [2023-04-01 06:37:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:37:58,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 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 57 [2023-04-01 06:37:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:37:58,149 INFO L225 Difference]: With dead ends: 1448 [2023-04-01 06:37:58,149 INFO L226 Difference]: Without dead ends: 1446 [2023-04-01 06:37:58,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:37:58,150 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 77 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:37:58,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 331 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:37:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-04-01 06:37:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 929. [2023-04-01 06:37:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 925 states have (on average 1.2908108108108107) internal successors, (1194), 925 states have internal predecessors, (1194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1197 transitions. [2023-04-01 06:37:58,371 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1197 transitions. Word has length 57 [2023-04-01 06:37:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:37:58,372 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1197 transitions. [2023-04-01 06:37:58,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:37:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1197 transitions. [2023-04-01 06:37:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 06:37:58,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:37:58,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:37:58,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:37:58,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:37:58,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:37:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 795672639, now seen corresponding path program 1 times [2023-04-01 06:37:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:37:58,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037565812] [2023-04-01 06:37:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:37:58,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:37:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:38:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:38:01,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:38:01,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037565812] [2023-04-01 06:38:01,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037565812] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:38:01,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765030021] [2023-04-01 06:38:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:38:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:38:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:38:01,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:38:01,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:38:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:38:02,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 06:38:02,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:38:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:38:07,868 INFO L327 TraceCheckSpWp]: Computing backward predicates...