/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:31:26,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:31:26,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:31:26,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-03 02:31:26,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:31:26,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:31:26,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:31:26,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:31:26,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:31:26,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:31:26,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:31:26,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:31:26,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:31:26,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:31:26,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:31:26,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:31:26,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-03 02:31:26,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:31:26,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:31:26,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:31:26,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:31:26,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:31:26,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:31:26,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:31:26,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:31:26,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:31:26,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:31:26,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:31:26,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:31:26,906 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:31:26,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:31:26,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:31:26,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:31:26,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:31:26,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:31:26,908 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:31:26,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:31:26,908 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:31:26,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:31:26,909 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:31:26,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:31:26,910 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:31:26,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:31:26,911 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:31:26,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:31:26,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:31:26,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:31:26,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:31:26,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:31:26,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:31:26,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:31:26,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:26,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:31:26,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:31:26,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:31:27,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:31:27,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:31:27,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:31:27,216 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:31:27,216 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:31:27,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:31:28,488 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:31:28,672 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:31:28,674 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:31:28,682 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/718e5610f/20e3d4e4f5fe464fa35c82b7f2e91c82/FLAGc98671d62 [2023-04-03 02:31:28,693 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/718e5610f/20e3d4e4f5fe464fa35c82b7f2e91c82 [2023-04-03 02:31:28,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:31:28,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:31:28,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:28,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:31:28,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:31:28,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:28" (1/1) ... [2023-04-03 02:31:28,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0e5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:28, skipping insertion in model container [2023-04-03 02:31:28,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:28" (1/1) ... [2023-04-03 02:31:28,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:31:28,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:31:28,892 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-04-03 02:31:28,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:28,944 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:31:28,972 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-04-03 02:31:28,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:29,001 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:31:29,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29 WrapperNode [2023-04-03 02:31:29,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:29,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:31:29,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:31:29,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:31:29,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:31:29,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:31:29,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:31:29,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:31:29,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (1/1) ... [2023-04-03 02:31:29,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:29,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:31:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:31:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:31:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:31:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:31:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:31:29,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:31:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:31:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:31:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:31:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:31:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:31:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:31:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:31:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:31:29,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:31:29,268 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:31:29,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:31:29,731 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:31:29,856 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:31:29,856 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:31:29,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:29 BoogieIcfgContainer [2023-04-03 02:31:29,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:31:29,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:31:29,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:31:29,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:31:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:31:28" (1/3) ... [2023-04-03 02:31:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdcac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:29, skipping insertion in model container [2023-04-03 02:31:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:29" (2/3) ... [2023-04-03 02:31:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdcac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:29, skipping insertion in model container [2023-04-03 02:31:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:29" (3/3) ... [2023-04-03 02:31:29,868 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:31:29,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:31:29,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:31:29,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:31:29,942 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;@169c408, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:31:29,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:31:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 64 states have (on average 1.640625) internal successors, (105), 65 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:31:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 02:31:29,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:29,955 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] [2023-04-03 02:31:29,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:29,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash -246653396, now seen corresponding path program 1 times [2023-04-03 02:31:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061755042] [2023-04-03 02:31:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:30,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:30,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061755042] [2023-04-03 02:31:30,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061755042] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:30,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:30,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062941192] [2023-04-03 02:31:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:30,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:30,428 INFO L87 Difference]: Start difference. First operand has 70 states, 64 states have (on average 1.640625) internal successors, (105), 65 states have internal predecessors, (105), 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 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:30,543 INFO L93 Difference]: Finished difference Result 153 states and 228 transitions. [2023-04-03 02:31:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2023-04-03 02:31:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:30,556 INFO L225 Difference]: With dead ends: 153 [2023-04-03 02:31:30,556 INFO L226 Difference]: Without dead ends: 98 [2023-04-03 02:31:30,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:30,564 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 78 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:30,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 202 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-03 02:31:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-04-03 02:31:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2023-04-03 02:31:30,632 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 32 [2023-04-03 02:31:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:30,633 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2023-04-03 02:31:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2023-04-03 02:31:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:31:30,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:30,638 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] [2023-04-03 02:31:30,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:31:30,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:30,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1605806612, now seen corresponding path program 1 times [2023-04-03 02:31:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:30,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593606806] [2023-04-03 02:31:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:30,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593606806] [2023-04-03 02:31:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593606806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:30,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:30,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:30,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130085519] [2023-04-03 02:31:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:30,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:30,825 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:30,949 INFO L93 Difference]: Finished difference Result 220 states and 316 transitions. [2023-04-03 02:31:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2023-04-03 02:31:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:30,959 INFO L225 Difference]: With dead ends: 220 [2023-04-03 02:31:30,963 INFO L226 Difference]: Without dead ends: 147 [2023-04-03 02:31:30,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:30,965 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 155 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 [2023-04-03 02:31:30,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 155 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-03 02:31:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-04-03 02:31:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2023-04-03 02:31:30,992 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 35 [2023-04-03 02:31:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:30,993 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2023-04-03 02:31:30,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2023-04-03 02:31:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-03 02:31:30,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:30,994 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] [2023-04-03 02:31:30,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:31:30,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:30,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1274847897, now seen corresponding path program 1 times [2023-04-03 02:31:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:30,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756881495] [2023-04-03 02:31:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:31,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756881495] [2023-04-03 02:31:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756881495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:31,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:31,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747378236] [2023-04-03 02:31:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:31,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:31,093 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:31,162 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2023-04-03 02:31:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:31,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2023-04-03 02:31:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:31,166 INFO L225 Difference]: With dead ends: 345 [2023-04-03 02:31:31,166 INFO L226 Difference]: Without dead ends: 223 [2023-04-03 02:31:31,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:31,168 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 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 [2023-04-03 02:31:31,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-03 02:31:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-03 02:31:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.423963133640553) internal successors, (309), 217 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2023-04-03 02:31:31,210 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 38 [2023-04-03 02:31:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:31,210 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2023-04-03 02:31:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2023-04-03 02:31:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:31:31,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:31,212 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] [2023-04-03 02:31:31,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:31:31,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:31,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1292569901, now seen corresponding path program 1 times [2023-04-03 02:31:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404490471] [2023-04-03 02:31:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:31,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404490471] [2023-04-03 02:31:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404490471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:31,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466334575] [2023-04-03 02:31:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:31,340 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:31,557 INFO L93 Difference]: Finished difference Result 707 states and 1011 transitions. [2023-04-03 02:31:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:31,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 41 [2023-04-03 02:31:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:31,561 INFO L225 Difference]: With dead ends: 707 [2023-04-03 02:31:31,561 INFO L226 Difference]: Without dead ends: 509 [2023-04-03 02:31:31,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:31,573 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:31,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 274 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-04-03 02:31:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2023-04-03 02:31:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.4231536926147705) internal successors, (713), 501 states have internal predecessors, (713), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2023-04-03 02:31:31,729 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 41 [2023-04-03 02:31:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:31,730 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2023-04-03 02:31:31,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2023-04-03 02:31:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:31:31,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:31,737 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] [2023-04-03 02:31:31,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:31:31,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:31,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -822925084, now seen corresponding path program 1 times [2023-04-03 02:31:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859096920] [2023-04-03 02:31:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:31,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:31,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859096920] [2023-04-03 02:31:31,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859096920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:31,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087784268] [2023-04-03 02:31:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:31,885 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:32,235 INFO L93 Difference]: Finished difference Result 1287 states and 1850 transitions. [2023-04-03 02:31:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 43 [2023-04-03 02:31:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:32,239 INFO L225 Difference]: With dead ends: 1287 [2023-04-03 02:31:32,240 INFO L226 Difference]: Without dead ends: 805 [2023-04-03 02:31:32,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:32,242 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 336 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:32,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 89 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-04-03 02:31:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 803. [2023-04-03 02:31:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4180225281602004) internal successors, (1133), 799 states have internal predecessors, (1133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1136 transitions. [2023-04-03 02:31:32,466 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1136 transitions. Word has length 43 [2023-04-03 02:31:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:32,467 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1136 transitions. [2023-04-03 02:31:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1136 transitions. [2023-04-03 02:31:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:31:32,468 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:32,468 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] [2023-04-03 02:31:32,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:31:32,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:32,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1446775841, now seen corresponding path program 1 times [2023-04-03 02:31:32,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413961326] [2023-04-03 02:31:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:32,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413961326] [2023-04-03 02:31:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413961326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:32,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:32,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:31:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640173124] [2023-04-03 02:31:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:31:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:31:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:31:32,903 INFO L87 Difference]: Start difference. First operand 803 states and 1136 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:33,422 INFO L93 Difference]: Finished difference Result 1482 states and 2099 transitions. [2023-04-03 02:31:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:31:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 43 [2023-04-03 02:31:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:33,429 INFO L225 Difference]: With dead ends: 1482 [2023-04-03 02:31:33,430 INFO L226 Difference]: Without dead ends: 1480 [2023-04-03 02:31:33,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:31:33,432 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 501 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:33,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 672 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-03 02:31:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 940. [2023-04-03 02:31:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.4166666666666667) internal successors, (1326), 936 states have internal predecessors, (1326), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1329 transitions. [2023-04-03 02:31:33,682 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1329 transitions. Word has length 43 [2023-04-03 02:31:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1329 transitions. [2023-04-03 02:31:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1329 transitions. [2023-04-03 02:31:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:31:33,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:33,687 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:31:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:31:33,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:33,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash -437766301, now seen corresponding path program 1 times [2023-04-03 02:31:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225722822] [2023-04-03 02:31:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:34,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:34,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225722822] [2023-04-03 02:31:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225722822] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:31:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450327445] [2023-04-03 02:31:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:31:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:34,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:31:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:31:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:34,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-03 02:31:34,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:31:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:36,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:31:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450327445] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:31:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890258498] [2023-04-03 02:31:40,326 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:31:40,327 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:31:40,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:31:40,334 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:31:40,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:31:40,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 116 for LOIs [2023-04-03 02:32:02,302 WARN L223 SmtUtils]: Spent 18.90s on a formula simplification. DAG size of input: 6010 DAG size of output: 268 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:32:22,241 WARN L223 SmtUtils]: Spent 17.83s on a formula simplification. DAG size of input: 6043 DAG size of output: 371 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:32:41,252 WARN L223 SmtUtils]: Spent 17.74s on a formula simplification. DAG size of input: 6010 DAG size of output: 268 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:33:00,169 WARN L223 SmtUtils]: Spent 17.36s on a formula simplification. DAG size of input: 6043 DAG size of output: 371 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:33:12,558 WARN L223 SmtUtils]: Spent 11.52s on a formula simplification. DAG size of input: 5005 DAG size of output: 305 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:33:27,890 WARN L223 SmtUtils]: Spent 13.78s on a formula simplification. DAG size of input: 5470 DAG size of output: 362 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:33:50,735 WARN L223 SmtUtils]: Spent 21.96s on a formula simplification. DAG size of input: 7007 DAG size of output: 740 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:03,296 WARN L223 SmtUtils]: Spent 10.19s on a formula simplification. DAG size of input: 4774 DAG size of output: 292 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:19,253 WARN L223 SmtUtils]: Spent 13.56s on a formula simplification. DAG size of input: 5417 DAG size of output: 322 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:28,550 WARN L223 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 4295 DAG size of output: 242 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:41,719 WARN L223 SmtUtils]: Spent 11.99s on a formula simplification. DAG size of input: 5076 DAG size of output: 292 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:52,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 100 for LOIs [2023-04-03 02:34:52,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:35:01,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11393#(and (= (mod main_~assert__arg~0 256) 0) (<= ~mode2~0 (+ 1 main_~check__tmp~0)) (= ~p1_new~0 ~p2_old~0) (= ~__return_6453~0 main_~check__tmp~0) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (<= ~mode1~0 (+ 1 main_~check__tmp~0)) (= main_~main__c1~0 main_~assert__arg~0) (= ~p3_new~0 ~p2_new~0) (= ~p2_new~0 ~p2_old~0) (<= 0 (+ main_~assert__arg~0 ~mode3~0)) (= main_~main__c1~0 ~__return_6453~0) (<= ~__return_6453~0 1) (= ~p3_old~0 ~p2_new~0) (<= ~mode3~0 (+ ~__return_6453~0 1)) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:35:01,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:35:01,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:35:01,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 42 [2023-04-03 02:35:01,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611879531] [2023-04-03 02:35:01,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:35:01,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-03 02:35:01,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-03 02:35:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=5910, Unknown=0, NotChecked=0, Total=6806 [2023-04-03 02:35:01,260 INFO L87 Difference]: Start difference. First operand 940 states and 1329 transitions. Second operand has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:27,448 INFO L93 Difference]: Finished difference Result 7714 states and 10867 transitions. [2023-04-03 02:35:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2023-04-03 02:35:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-04-03 02:35:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:27,472 INFO L225 Difference]: With dead ends: 7714 [2023-04-03 02:35:27,473 INFO L226 Difference]: Without dead ends: 6366 [2023-04-03 02:35:27,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30439 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=11293, Invalid=60263, Unknown=0, NotChecked=0, Total=71556 [2023-04-03 02:35:27,495 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 6648 mSDsluCounter, 2496 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6648 SdHoareTripleChecker+Valid, 2625 SdHoareTripleChecker+Invalid, 4394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:27,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6648 Valid, 2625 Invalid, 4394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-03 02:35:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2023-04-03 02:35:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 2949. [2023-04-03 02:35:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2945 states have (on average 1.3796264855687606) internal successors, (4063), 2945 states have internal predecessors, (4063), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4066 transitions. [2023-04-03 02:35:28,347 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4066 transitions. Word has length 51 [2023-04-03 02:35:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:28,347 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4066 transitions. [2023-04-03 02:35:28,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 42 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4066 transitions. [2023-04-03 02:35:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:35:28,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:28,349 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:35:28,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:35:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:35:28,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:28,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1741270906, now seen corresponding path program 1 times [2023-04-03 02:35:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047412807] [2023-04-03 02:35:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:35:28,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047412807] [2023-04-03 02:35:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047412807] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:28,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:28,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863333198] [2023-04-03 02:35:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:28,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:28,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:28,649 INFO L87 Difference]: Start difference. First operand 2949 states and 4066 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:30,008 INFO L93 Difference]: Finished difference Result 7418 states and 10311 transitions. [2023-04-03 02:35:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:30,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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 51 [2023-04-03 02:35:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:30,023 INFO L225 Difference]: With dead ends: 7418 [2023-04-03 02:35:30,023 INFO L226 Difference]: Without dead ends: 4527 [2023-04-03 02:35:30,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:30,030 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 313 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:30,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2023-04-03 02:35:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 4506. [2023-04-03 02:35:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4502 states have (on average 1.3742780986228342) internal successors, (6187), 4502 states have internal predecessors, (6187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 6190 transitions. [2023-04-03 02:35:31,488 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 6190 transitions. Word has length 51 [2023-04-03 02:35:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:31,488 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 6190 transitions. [2023-04-03 02:35:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 6190 transitions. [2023-04-03 02:35:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:35:31,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:31,489 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:35:31,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:35:31,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:31,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash 926858911, now seen corresponding path program 1 times [2023-04-03 02:35:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:31,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268014696] [2023-04-03 02:35:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:32,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268014696] [2023-04-03 02:35:32,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268014696] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:35:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126571511] [2023-04-03 02:35:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:35:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:32,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:35:32,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:35:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:32,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-03 02:35:32,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:35:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:33,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:35:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:35,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126571511] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:35:35,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732230100] [2023-04-03 02:35:35,943 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:35:35,943 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:35:35,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:35:35,944 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:35:35,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:35:36,218 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 116 for LOIs