./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de42.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:32:56,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:32:56,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:32:56,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:32:57,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:32:57,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:32:57,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:32:57,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:32:57,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:32:57,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:32:57,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:32:57,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:32:57,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:32:57,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:32:57,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:32:57,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:32:57,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:32:57,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:32:57,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:32:57,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:32:57,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:32:57,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:32:57,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:32:57,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:32:57,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:32:57,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:32:57,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:32:57,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:32:57,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:32:57,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:32:57,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:32:57,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:32:57,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:32:57,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:32:57,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:32:57,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:32:57,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:32:57,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:32:57,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:32:57,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:32:57,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:32:57,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:32:57,066 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:32:57,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:32:57,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:32:57,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:32:57,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:32:57,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:32:57,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:32:57,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:32:57,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:32:57,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:32:57,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:32:57,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:32:57,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:32:57,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:32:57,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:32:57,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:32:57,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:32:57,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:32:57,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:32:57,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:32:57,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:32:57,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:32:57,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:32:57,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:32:57,074 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:32:57,074 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2023-02-18 00:32:57,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:32:57,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:32:57,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:32:57,285 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:32:57,286 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:32:57,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2023-02-18 00:32:58,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:32:58,362 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:32:58,362 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c [2023-02-18 00:32:58,366 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f427f184/908517f9cd934641bf14a189b82a4e83/FLAG850f0afd1 [2023-02-18 00:32:58,376 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f427f184/908517f9cd934641bf14a189b82a4e83 [2023-02-18 00:32:58,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:32:58,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:32:58,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:32:58,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:32:58,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:32:58,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225febf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58, skipping insertion in model container [2023-02-18 00:32:58,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:32:58,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:32:58,502 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2023-02-18 00:32:58,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:32:58,523 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:32:58,535 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2023-02-18 00:32:58,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:32:58,550 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:32:58,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58 WrapperNode [2023-02-18 00:32:58,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:32:58,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:32:58,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:32:58,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:32:58,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,574 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 00:32:58,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:32:58,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:32:58,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:32:58,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:32:58,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:32:58,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:32:58,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:32:58,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:32:58,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (1/1) ... [2023-02-18 00:32:58,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:32:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:58,626 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) [2023-02-18 00:32:58,629 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 [2023-02-18 00:32:58,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:32:58,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:32:58,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:32:58,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:32:58,703 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:32:58,705 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:32:58,833 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:32:58,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:32:58,837 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 00:32:58,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:32:58 BoogieIcfgContainer [2023-02-18 00:32:58,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:32:58,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:32:58,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:32:58,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:32:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:32:58" (1/3) ... [2023-02-18 00:32:58,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b04cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:32:58, skipping insertion in model container [2023-02-18 00:32:58,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:32:58" (2/3) ... [2023-02-18 00:32:58,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b04cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:32:58, skipping insertion in model container [2023-02-18 00:32:58,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:32:58" (3/3) ... [2023-02-18 00:32:58,844 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de42.c [2023-02-18 00:32:58,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:32:58,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:32:58,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:32:58,908 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=PETRI_NET, 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;@3eab1cfd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:32:58,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:32:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:32:58,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:58,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:58,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2023-02-18 00:32:58,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:58,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997063453] [2023-02-18 00:32:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:58,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:59,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997063453] [2023-02-18 00:32:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997063453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:32:59,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:32:59,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 00:32:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791909193] [2023-02-18 00:32:59,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:32:59,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 00:32:59,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 00:32:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:32:59,093 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:59,106 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-02-18 00:32:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 00:32:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 00:32:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:59,112 INFO L225 Difference]: With dead ends: 27 [2023-02-18 00:32:59,113 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 00:32:59,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:32:59,124 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:59,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:32:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 00:32:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 00:32:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-02-18 00:32:59,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2023-02-18 00:32:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:59,144 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-02-18 00:32:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-02-18 00:32:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:32:59,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:59,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:59,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:32:59,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2023-02-18 00:32:59,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:59,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890282848] [2023-02-18 00:32:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:59,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890282848] [2023-02-18 00:32:59,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890282848] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:32:59,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:32:59,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 00:32:59,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535215679] [2023-02-18 00:32:59,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:32:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 00:32:59,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 00:32:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:32:59,421 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:59,495 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-02-18 00:32:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:32:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 00:32:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:59,497 INFO L225 Difference]: With dead ends: 29 [2023-02-18 00:32:59,497 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 00:32:59,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:32:59,499 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:59,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:32:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 00:32:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2023-02-18 00:32:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-18 00:32:59,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2023-02-18 00:32:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:59,508 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-18 00:32:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-18 00:32:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:32:59,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:59,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 00:32:59,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 105287507, now seen corresponding path program 1 times [2023-02-18 00:32:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089958966] [2023-02-18 00:32:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089958966] [2023-02-18 00:32:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089958966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:32:59,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:32:59,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:32:59,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473715656] [2023-02-18 00:32:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:32:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:32:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:59,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:32:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:32:59,549 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:59,557 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-02-18 00:32:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:32:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 00:32:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:59,558 INFO L225 Difference]: With dead ends: 30 [2023-02-18 00:32:59,558 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 00:32:59,558 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 [2023-02-18 00:32:59,559 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:59,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:32:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 00:32:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-02-18 00:32:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-02-18 00:32:59,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2023-02-18 00:32:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:59,563 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-02-18 00:32:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-02-18 00:32:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:32:59,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:59,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:59,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 00:32:59,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1508115906, now seen corresponding path program 1 times [2023-02-18 00:32:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378112721] [2023-02-18 00:32:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378112721] [2023-02-18 00:32:59,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378112721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:32:59,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:32:59,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:32:59,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726513543] [2023-02-18 00:32:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:32:59,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:32:59,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:32:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:32:59,618 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:59,643 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-02-18 00:32:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:32:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 00:32:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:59,644 INFO L225 Difference]: With dead ends: 21 [2023-02-18 00:32:59,644 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 00:32:59,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:32:59,645 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:59,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:32:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 00:32:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 00:32:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-02-18 00:32:59,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 11 [2023-02-18 00:32:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:59,648 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-02-18 00:32:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-02-18 00:32:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:32:59,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:59,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:59,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 00:32:59,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2023-02-18 00:32:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14631729] [2023-02-18 00:32:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:59,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14631729] [2023-02-18 00:32:59,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14631729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:59,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464534473] [2023-02-18 00:32:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:59,731 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) [2023-02-18 00:32:59,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:32:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 00:32:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464534473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:59,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:59,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 00:32:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463440457] [2023-02-18 00:32:59,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:59,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:32:59,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:59,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:32:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:32:59,801 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:59,859 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2023-02-18 00:32:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 00:32:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 00:32:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:59,861 INFO L225 Difference]: With dead ends: 40 [2023-02-18 00:32:59,861 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 00:32:59,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:32:59,862 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:59,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:32:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 00:32:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2023-02-18 00:32:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-02-18 00:32:59,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2023-02-18 00:32:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:59,867 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-02-18 00:32:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-02-18 00:32:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:32:59,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:59,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:59,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:00,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2023-02-18 00:33:00,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:00,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4832467] [2023-02-18 00:33:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:33:00,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:00,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4832467] [2023-02-18 00:33:00,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4832467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:00,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694402673] [2023-02-18 00:33:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:00,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:00,123 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) [2023-02-18 00:33:00,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:33:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 00:33:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:33:00,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:33:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694402673] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:00,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:00,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 00:33:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406248424] [2023-02-18 00:33:00,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:33:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:33:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:33:00,198 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:00,233 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2023-02-18 00:33:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:33:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:33:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:00,235 INFO L225 Difference]: With dead ends: 39 [2023-02-18 00:33:00,235 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 00:33:00,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:33:00,236 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:33:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 00:33:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-02-18 00:33:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2023-02-18 00:33:00,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2023-02-18 00:33:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:00,247 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2023-02-18 00:33:00,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2023-02-18 00:33:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 00:33:00,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:00,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:00,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 00:33:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 00:33:00,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2023-02-18 00:33:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006825238] [2023-02-18 00:33:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:00,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006825238] [2023-02-18 00:33:00,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006825238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71553177] [2023-02-18 00:33:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:00,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:00,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:00,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:00,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:33:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 00:33:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:00,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71553177] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:01,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:01,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2023-02-18 00:33:01,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549114568] [2023-02-18 00:33:01,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:01,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:33:01,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:33:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:33:01,194 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:01,566 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2023-02-18 00:33:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 00:33:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 00:33:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:01,567 INFO L225 Difference]: With dead ends: 45 [2023-02-18 00:33:01,567 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 00:33:01,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:33:01,568 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:01,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:33:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 00:33:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-02-18 00:33:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2023-02-18 00:33:01,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 14 [2023-02-18 00:33:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:01,576 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2023-02-18 00:33:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2023-02-18 00:33:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 00:33:01,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:01,577 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:01,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:01,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:01,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2023-02-18 00:33:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:01,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264254107] [2023-02-18 00:33:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:01,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264254107] [2023-02-18 00:33:01,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264254107] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669504126] [2023-02-18 00:33:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:01,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:01,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:01,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:33:01,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 00:33:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:01,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:01,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669504126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:01,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:01,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 00:33:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205212485] [2023-02-18 00:33:01,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:33:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:33:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:33:01,951 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:02,289 INFO L93 Difference]: Finished difference Result 109 states and 181 transitions. [2023-02-18 00:33:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:33:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 00:33:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:02,291 INFO L225 Difference]: With dead ends: 109 [2023-02-18 00:33:02,291 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 00:33:02,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:33:02,291 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 180 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:02,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 82 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:33:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 00:33:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2023-02-18 00:33:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2023-02-18 00:33:02,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 14 [2023-02-18 00:33:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:02,308 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2023-02-18 00:33:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2023-02-18 00:33:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:33:02,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:02,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:02,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:02,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 2 times [2023-02-18 00:33:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527733494] [2023-02-18 00:33:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:33:02,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527733494] [2023-02-18 00:33:02,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527733494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244508926] [2023-02-18 00:33:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:02,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:02,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:02,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:33:02,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:33:02,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:33:02,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:33:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244508926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:02,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:02,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 00:33:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937230727] [2023-02-18 00:33:02,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:33:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:33:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:33:02,636 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:02,728 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2023-02-18 00:33:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:33:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:33:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:02,729 INFO L225 Difference]: With dead ends: 85 [2023-02-18 00:33:02,729 INFO L226 Difference]: Without dead ends: 70 [2023-02-18 00:33:02,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:33:02,729 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:02,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:33:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-18 00:33:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2023-02-18 00:33:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2023-02-18 00:33:02,739 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 16 [2023-02-18 00:33:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:02,739 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2023-02-18 00:33:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2023-02-18 00:33:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:33:02,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:02,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:02,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:02,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:02,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 2 times [2023-02-18 00:33:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:02,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172896782] [2023-02-18 00:33:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:03,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172896782] [2023-02-18 00:33:03,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172896782] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832767564] [2023-02-18 00:33:03,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:03,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:03,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:03,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:33:03,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:03,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:33:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:03,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:03,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832767564] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:03,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:03,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-18 00:33:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307979558] [2023-02-18 00:33:03,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 00:33:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 00:33:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:33:03,086 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:03,132 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2023-02-18 00:33:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:33:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:33:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:03,134 INFO L225 Difference]: With dead ends: 72 [2023-02-18 00:33:03,134 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 00:33:03,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:33:03,135 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:03,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 62 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:33:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 00:33:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2023-02-18 00:33:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2023-02-18 00:33:03,155 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 16 [2023-02-18 00:33:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:03,156 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2023-02-18 00:33:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2023-02-18 00:33:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:33:03,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:03,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:03,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:03,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:03,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 3 times [2023-02-18 00:33:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056978091] [2023-02-18 00:33:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:03,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056978091] [2023-02-18 00:33:03,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056978091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713404650] [2023-02-18 00:33:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:33:03,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:03,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:03,614 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:03,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:33:03,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:33:03,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:03,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 00:33:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713404650] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:42,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:42,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 34 [2023-02-18 00:33:42,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279158461] [2023-02-18 00:33:42,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:42,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:33:42,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:33:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=964, Unknown=1, NotChecked=0, Total=1122 [2023-02-18 00:33:42,418 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:44,274 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2023-02-18 00:33:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 00:33:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:33:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:44,275 INFO L225 Difference]: With dead ends: 84 [2023-02-18 00:33:44,275 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 00:33:44,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=301, Invalid=1590, Unknown=1, NotChecked=0, Total=1892 [2023-02-18 00:33:44,276 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:44,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 00:33:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 00:33:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2023-02-18 00:33:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2023-02-18 00:33:44,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 18 [2023-02-18 00:33:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:44,290 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2023-02-18 00:33:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2023-02-18 00:33:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:33:44,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:44,291 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:44,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:44,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:44,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 469660332, now seen corresponding path program 4 times [2023-02-18 00:33:44,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:44,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219551737] [2023-02-18 00:33:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:44,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:33:44,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219551737] [2023-02-18 00:33:44,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219551737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161251287] [2023-02-18 00:33:44,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:33:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:44,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:44,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:33:44,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:33:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 00:33:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:33:44,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:33:44,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161251287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:44,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:44,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-02-18 00:33:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080666776] [2023-02-18 00:33:44,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 00:33:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 00:33:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:33:44,705 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:45,951 INFO L93 Difference]: Finished difference Result 167 states and 251 transitions. [2023-02-18 00:33:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 00:33:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:33:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:45,952 INFO L225 Difference]: With dead ends: 167 [2023-02-18 00:33:45,952 INFO L226 Difference]: Without dead ends: 145 [2023-02-18 00:33:45,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=2764, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:33:45,954 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 265 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:45,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 109 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:33:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-18 00:33:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 79. [2023-02-18 00:33:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 78 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2023-02-18 00:33:45,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 18 [2023-02-18 00:33:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:45,973 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2023-02-18 00:33:45,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2023-02-18 00:33:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:33:45,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:45,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:45,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 00:33:46,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 3 times [2023-02-18 00:33:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:46,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761271995] [2023-02-18 00:33:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:33:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:46,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761271995] [2023-02-18 00:33:46,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761271995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202002328] [2023-02-18 00:33:46,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:33:46,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:46,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:46,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:46,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 00:33:46,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:33:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:33:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:33:46,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:33:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202002328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:46,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-02-18 00:33:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339180666] [2023-02-18 00:33:46,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 00:33:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 00:33:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:33:46,342 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:46,406 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2023-02-18 00:33:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 00:33:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:33:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:46,407 INFO L225 Difference]: With dead ends: 105 [2023-02-18 00:33:46,407 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 00:33:46,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:33:46,408 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:46,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 70 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:33:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 00:33:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-02-18 00:33:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 93 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2023-02-18 00:33:46,428 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 19 [2023-02-18 00:33:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:46,429 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2023-02-18 00:33:46,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2023-02-18 00:33:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:33:46,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:46,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:46,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 00:33:46,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 00:33:46,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 5 times [2023-02-18 00:33:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:46,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710806359] [2023-02-18 00:33:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:33:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710806359] [2023-02-18 00:33:46,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710806359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091677805] [2023-02-18 00:33:46,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:33:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:46,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 00:33:46,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 00:33:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:33:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:33:46,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:33:46,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091677805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:46,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:46,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-02-18 00:33:46,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026036130] [2023-02-18 00:33:46,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:33:46,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:46,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:33:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:33:46,800 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:46,975 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-18 00:33:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:33:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 00:33:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:46,975 INFO L225 Difference]: With dead ends: 143 [2023-02-18 00:33:46,975 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 00:33:46,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:33:46,976 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:46,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:33:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 00:33:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2023-02-18 00:33:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2023-02-18 00:33:47,000 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 126 transitions. Word has length 20 [2023-02-18 00:33:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:47,000 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 126 transitions. [2023-02-18 00:33:47,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 126 transitions. [2023-02-18 00:33:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:33:47,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:47,001 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:47,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 00:33:47,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 00:33:47,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:47,206 INFO L85 PathProgramCache]: Analyzing trace with hash 401524257, now seen corresponding path program 3 times [2023-02-18 00:33:47,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459450192] [2023-02-18 00:33:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:47,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:47,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459450192] [2023-02-18 00:33:47,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459450192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459783902] [2023-02-18 00:33:47,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:33:47,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:47,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:47,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 00:33:47,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 00:33:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 00:33:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:47,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:47,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459783902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:47,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:47,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2023-02-18 00:33:47,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258606327] [2023-02-18 00:33:47,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:47,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:33:47,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:47,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:33:47,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:33:47,625 INFO L87 Difference]: Start difference. First operand 91 states and 126 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:56,081 INFO L93 Difference]: Finished difference Result 397 states and 609 transitions. [2023-02-18 00:33:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 00:33:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:33:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:56,083 INFO L225 Difference]: With dead ends: 397 [2023-02-18 00:33:56,083 INFO L226 Difference]: Without dead ends: 365 [2023-02-18 00:33:56,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:33:56,084 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 687 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:56,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 415 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 00:33:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-02-18 00:33:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 141. [2023-02-18 00:33:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3928571428571428) internal successors, (195), 140 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 195 transitions. [2023-02-18 00:33:56,119 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 195 transitions. Word has length 21 [2023-02-18 00:33:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:56,119 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 195 transitions. [2023-02-18 00:33:56,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 195 transitions. [2023-02-18 00:33:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:33:56,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:56,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:56,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:56,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 00:33:56,322 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 6 times [2023-02-18 00:33:56,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:56,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938442261] [2023-02-18 00:33:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:56,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:56,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938442261] [2023-02-18 00:33:56,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938442261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522850997] [2023-02-18 00:33:56,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:33:56,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:56,563 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:56,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 00:33:56,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:33:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:56,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 00:33:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:57,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:57,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522850997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:57,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:57,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 46 [2023-02-18 00:33:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476844991] [2023-02-18 00:33:57,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:57,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:33:57,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:33:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:33:57,894 INFO L87 Difference]: Start difference. First operand 141 states and 195 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:00,411 INFO L93 Difference]: Finished difference Result 166 states and 223 transitions. [2023-02-18 00:34:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 00:34:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:34:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:00,412 INFO L225 Difference]: With dead ends: 166 [2023-02-18 00:34:00,412 INFO L226 Difference]: Without dead ends: 139 [2023-02-18 00:34:00,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=540, Invalid=3120, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:34:00,413 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:00,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 100 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 00:34:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-18 00:34:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2023-02-18 00:34:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3925925925925926) internal successors, (188), 135 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 188 transitions. [2023-02-18 00:34:00,469 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 188 transitions. Word has length 22 [2023-02-18 00:34:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:00,469 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 188 transitions. [2023-02-18 00:34:00,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 188 transitions. [2023-02-18 00:34:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:34:00,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:00,470 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:00,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:00,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 00:34:00,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 4 times [2023-02-18 00:34:00,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:00,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298129823] [2023-02-18 00:34:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:00,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298129823] [2023-02-18 00:34:00,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298129823] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561454926] [2023-02-18 00:34:00,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:34:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:00,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:00,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 00:34:00,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:34:00,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:34:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:34:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:00,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561454926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:00,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:00,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2023-02-18 00:34:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417011768] [2023-02-18 00:34:00,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:00,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:34:00,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:34:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:34:00,900 INFO L87 Difference]: Start difference. First operand 136 states and 188 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:01,030 INFO L93 Difference]: Finished difference Result 175 states and 245 transitions. [2023-02-18 00:34:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 00:34:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:34:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:01,032 INFO L225 Difference]: With dead ends: 175 [2023-02-18 00:34:01,032 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 00:34:01,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:34:01,032 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:01,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:34:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 00:34:01,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2023-02-18 00:34:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.4) internal successors, (224), 160 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2023-02-18 00:34:01,093 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 22 [2023-02-18 00:34:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:01,093 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2023-02-18 00:34:01,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2023-02-18 00:34:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:34:01,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:01,094 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:01,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:01,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 00:34:01,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 5 times [2023-02-18 00:34:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745127695] [2023-02-18 00:34:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:01,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:01,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745127695] [2023-02-18 00:34:01,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745127695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:01,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352228942] [2023-02-18 00:34:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:34:01,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:01,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:01,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 00:34:01,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:34:01,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:34:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:34:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:01,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:34:01,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352228942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:01,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:01,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-02-18 00:34:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102161978] [2023-02-18 00:34:01,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:34:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:34:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:34:01,640 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:02,101 INFO L93 Difference]: Finished difference Result 291 states and 371 transitions. [2023-02-18 00:34:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 00:34:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:34:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:02,102 INFO L225 Difference]: With dead ends: 291 [2023-02-18 00:34:02,102 INFO L226 Difference]: Without dead ends: 271 [2023-02-18 00:34:02,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:34:02,103 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:02,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 123 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:34:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-18 00:34:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 175. [2023-02-18 00:34:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4195402298850575) internal successors, (247), 174 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 247 transitions. [2023-02-18 00:34:02,170 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 247 transitions. Word has length 23 [2023-02-18 00:34:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:02,170 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 247 transitions. [2023-02-18 00:34:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 247 transitions. [2023-02-18 00:34:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:34:02,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:02,171 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:02,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:02,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:02,373 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 418509715, now seen corresponding path program 1 times [2023-02-18 00:34:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281991326] [2023-02-18 00:34:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:34:02,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:02,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281991326] [2023-02-18 00:34:02,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281991326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:02,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233353385] [2023-02-18 00:34:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:02,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:02,491 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:02,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 00:34:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:34:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:34:02,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 00:34:02,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233353385] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:02,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 00:34:02,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 16] total 19 [2023-02-18 00:34:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51739567] [2023-02-18 00:34:02,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:34:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:34:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:34:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:34:02,627 INFO L87 Difference]: Start difference. First operand 175 states and 247 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:02,700 INFO L93 Difference]: Finished difference Result 184 states and 257 transitions. [2023-02-18 00:34:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:34:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:34:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:02,701 INFO L225 Difference]: With dead ends: 184 [2023-02-18 00:34:02,701 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 00:34:02,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:34:02,701 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:02,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:34:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 00:34:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 00:34:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3988095238095237) internal successors, (235), 168 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2023-02-18 00:34:02,761 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 23 [2023-02-18 00:34:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:02,762 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2023-02-18 00:34:02,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2023-02-18 00:34:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:34:02,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:02,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:02,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:02,967 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 6 times [2023-02-18 00:34:02,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:02,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298174217] [2023-02-18 00:34:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:34:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298174217] [2023-02-18 00:34:03,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298174217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485623966] [2023-02-18 00:34:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:34:03,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:03,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:03,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 00:34:03,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:34:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:34:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:34:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:34:03,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:34:03,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485623966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:03,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:03,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2023-02-18 00:34:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718898336] [2023-02-18 00:34:03,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:03,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:34:03,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:34:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:34:03,269 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:03,459 INFO L93 Difference]: Finished difference Result 214 states and 303 transitions. [2023-02-18 00:34:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 00:34:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 00:34:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:03,461 INFO L225 Difference]: With dead ends: 214 [2023-02-18 00:34:03,461 INFO L226 Difference]: Without dead ends: 210 [2023-02-18 00:34:03,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:34:03,462 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:03,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 172 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:34:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-18 00:34:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2023-02-18 00:34:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.4111675126903553) internal successors, (278), 197 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 278 transitions. [2023-02-18 00:34:03,531 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 278 transitions. Word has length 25 [2023-02-18 00:34:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:03,532 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 278 transitions. [2023-02-18 00:34:03,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 278 transitions. [2023-02-18 00:34:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:34:03,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:03,532 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:03,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:03,737 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -584607823, now seen corresponding path program 7 times [2023-02-18 00:34:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:03,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793831684] [2023-02-18 00:34:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:34:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793831684] [2023-02-18 00:34:03,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793831684] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558445402] [2023-02-18 00:34:03,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:34:03,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:03,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:03,870 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:03,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 00:34:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 00:34:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:34:03,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:34:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558445402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:04,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:04,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 00:34:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467093685] [2023-02-18 00:34:04,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:34:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:34:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:34:04,255 INFO L87 Difference]: Start difference. First operand 198 states and 278 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:47,197 INFO L93 Difference]: Finished difference Result 643 states and 981 transitions. [2023-02-18 00:34:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-02-18 00:34:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 00:34:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:47,199 INFO L225 Difference]: With dead ends: 643 [2023-02-18 00:34:47,199 INFO L226 Difference]: Without dead ends: 612 [2023-02-18 00:34:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6897 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=5024, Invalid=13336, Unknown=0, NotChecked=0, Total=18360 [2023-02-18 00:34:47,203 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1217 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:47,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 347 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 00:34:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-02-18 00:34:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 227. [2023-02-18 00:34:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.420353982300885) internal successors, (321), 226 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 321 transitions. [2023-02-18 00:34:47,294 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 321 transitions. Word has length 25 [2023-02-18 00:34:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:47,294 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 321 transitions. [2023-02-18 00:34:47,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 321 transitions. [2023-02-18 00:34:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:34:47,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:47,295 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:47,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:47,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2023-02-18 00:34:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:47,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326095908] [2023-02-18 00:34:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:34:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:34:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:34:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326095908] [2023-02-18 00:34:47,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326095908] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:34:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620725062] [2023-02-18 00:34:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:34:47,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:34:47,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:34:47,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:34:47,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 00:34:47,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:34:47,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:34:47,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-18 00:34:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:34:48,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:34:50,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620725062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:50,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:50,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 55 [2023-02-18 00:34:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227417983] [2023-02-18 00:34:50,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:34:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:34:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:34:50,041 INFO L87 Difference]: Start difference. First operand 227 states and 321 transitions. Second operand has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:35:09,122 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2023-02-18 00:35:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:35:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:35:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:35:09,123 INFO L225 Difference]: With dead ends: 255 [2023-02-18 00:35:09,123 INFO L226 Difference]: Without dead ends: 249 [2023-02-18 00:35:09,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=857, Invalid=6625, Unknown=0, NotChecked=0, Total=7482 [2023-02-18 00:35:09,125 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 145 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:35:09,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 123 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-02-18 00:35:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-18 00:35:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2023-02-18 00:35:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4) internal successors, (336), 240 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2023-02-18 00:35:09,273 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 26 [2023-02-18 00:35:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:35:09,273 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2023-02-18 00:35:09,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2023-02-18 00:35:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:35:09,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:35:09,274 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:35:09,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 00:35:09,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:09,478 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:35:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:35:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -745924722, now seen corresponding path program 7 times [2023-02-18 00:35:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:35:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546448960] [2023-02-18 00:35:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:35:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:35:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:35:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:35:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:35:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546448960] [2023-02-18 00:35:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546448960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:35:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794997346] [2023-02-18 00:35:09,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:35:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:35:09,596 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:35:09,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 00:35:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:35:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:35:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:35:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:35:09,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:35:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:35:09,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794997346] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:35:09,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:35:09,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-02-18 00:35:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328558733] [2023-02-18 00:35:09,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:35:09,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:35:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:35:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:35:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:35:09,897 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:35:11,001 INFO L93 Difference]: Finished difference Result 429 states and 533 transitions. [2023-02-18 00:35:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 00:35:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:35:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:35:11,002 INFO L225 Difference]: With dead ends: 429 [2023-02-18 00:35:11,002 INFO L226 Difference]: Without dead ends: 403 [2023-02-18 00:35:11,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:35:11,003 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:35:11,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 200 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:35:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-02-18 00:35:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 248. [2023-02-18 00:35:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3967611336032388) internal successors, (345), 247 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 345 transitions. [2023-02-18 00:35:11,148 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 345 transitions. Word has length 26 [2023-02-18 00:35:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:35:11,148 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 345 transitions. [2023-02-18 00:35:11,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 345 transitions. [2023-02-18 00:35:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:35:11,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:35:11,149 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:35:11,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 00:35:11,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:11,362 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:35:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:35:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1973427396, now seen corresponding path program 9 times [2023-02-18 00:35:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:35:11,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709695232] [2023-02-18 00:35:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:35:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:35:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:35:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 00:35:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:35:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709695232] [2023-02-18 00:35:11,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709695232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:35:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879627157] [2023-02-18 00:35:11,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:35:11,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:35:11,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:35:11,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 00:35:11,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:35:11,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:35:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:35:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:35:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 00:35:11,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:35:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 00:35:11,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879627157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:35:11,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:35:11,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2023-02-18 00:35:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269119589] [2023-02-18 00:35:11,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:35:11,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:35:11,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:35:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:35:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:35:11,720 INFO L87 Difference]: Start difference. First operand 248 states and 345 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:35:12,416 INFO L93 Difference]: Finished difference Result 360 states and 460 transitions. [2023-02-18 00:35:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 00:35:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:35:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:35:12,417 INFO L225 Difference]: With dead ends: 360 [2023-02-18 00:35:12,417 INFO L226 Difference]: Without dead ends: 294 [2023-02-18 00:35:12,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:35:12,418 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:35:12,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 147 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:35:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-18 00:35:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 232. [2023-02-18 00:35:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.367965367965368) internal successors, (316), 231 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 316 transitions. [2023-02-18 00:35:12,559 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 316 transitions. Word has length 28 [2023-02-18 00:35:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:35:12,559 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 316 transitions. [2023-02-18 00:35:12,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 316 transitions. [2023-02-18 00:35:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:35:12,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:35:12,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:35:12,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 00:35:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-18 00:35:12,764 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:35:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:35:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1548332572, now seen corresponding path program 8 times [2023-02-18 00:35:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:35:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717138873] [2023-02-18 00:35:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:35:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:35:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:35:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:35:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:35:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717138873] [2023-02-18 00:35:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717138873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:35:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430700777] [2023-02-18 00:35:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:35:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:35:12,935 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:35:12,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 00:35:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:35:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:35:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:35:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:35:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:35:13,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:35:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:35:13,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430700777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:35:13,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:35:13,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2023-02-18 00:35:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877813733] [2023-02-18 00:35:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:35:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:35:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:35:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:35:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:35:13,131 INFO L87 Difference]: Start difference. First operand 232 states and 316 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:35:13,452 INFO L93 Difference]: Finished difference Result 285 states and 395 transitions. [2023-02-18 00:35:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:35:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:35:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:35:13,453 INFO L225 Difference]: With dead ends: 285 [2023-02-18 00:35:13,453 INFO L226 Difference]: Without dead ends: 281 [2023-02-18 00:35:13,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:35:13,454 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:35:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 213 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:35:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-18 00:35:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 264. [2023-02-18 00:35:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.3802281368821292) internal successors, (363), 263 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 363 transitions. [2023-02-18 00:35:13,605 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 363 transitions. Word has length 28 [2023-02-18 00:35:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:35:13,605 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 363 transitions. [2023-02-18 00:35:13,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:35:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 363 transitions. [2023-02-18 00:35:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:35:13,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:35:13,606 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:35:13,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 00:35:13,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 00:35:13,811 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:35:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:35:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash -435047903, now seen corresponding path program 10 times [2023-02-18 00:35:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:35:13,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705045677] [2023-02-18 00:35:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:35:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:35:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:35:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:35:13,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:35:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705045677] [2023-02-18 00:35:13,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705045677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:35:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151704348] [2023-02-18 00:35:13,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:35:13,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:35:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:35:13,972 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:35:13,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 00:35:14,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:35:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:35:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 00:35:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:35:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:35:14,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:35:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:35:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151704348] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:35:14,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:35:14,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-18 00:35:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964313023] [2023-02-18 00:35:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:35:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:35:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:35:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:35:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:35:14,454 INFO L87 Difference]: Start difference. First operand 264 states and 363 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:08,844 INFO L93 Difference]: Finished difference Result 824 states and 1156 transitions. [2023-02-18 00:37:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-02-18 00:37:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 00:37:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:08,848 INFO L225 Difference]: With dead ends: 824 [2023-02-18 00:37:08,848 INFO L226 Difference]: Without dead ends: 765 [2023-02-18 00:37:08,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15657 ImplicationChecksByTransitivity, 110.1s TimeCoverageRelationStatistics Valid=9292, Invalid=29713, Unknown=1, NotChecked=0, Total=39006 [2023-02-18 00:37:08,851 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1378 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:08,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 471 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-18 00:37:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-02-18 00:37:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 297. [2023-02-18 00:37:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3918918918918919) internal successors, (412), 296 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 412 transitions. [2023-02-18 00:37:09,044 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 412 transitions. Word has length 29 [2023-02-18 00:37:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:09,044 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 412 transitions. [2023-02-18 00:37:09,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 412 transitions. [2023-02-18 00:37:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:09,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:09,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:09,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 00:37:09,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 11 times [2023-02-18 00:37:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56051768] [2023-02-18 00:37:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:09,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:09,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56051768] [2023-02-18 00:37:09,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56051768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:09,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284079770] [2023-02-18 00:37:09,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:37:09,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:09,648 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:09,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 00:37:10,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:37:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:10,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 00:37:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates...