./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/recursive/Addition03-1.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 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:03:17,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:03:17,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:03:17,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:03:17,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:03:17,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:03:17,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:03:17,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:03:17,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:03:17,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:03:17,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:03:17,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:03:17,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:03:17,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:03:17,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:03:17,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:03:17,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:03:17,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:03:17,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:03:17,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:03:17,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:03:17,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:03:17,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:03:17,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:03:17,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:03:17,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:03:17,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:03:17,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:03:17,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:03:17,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:03:17,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:03:17,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:03:17,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:03:17,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:03:17,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:03:17,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:03:17,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:03:17,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:03:17,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:03:17,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:03:17,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:03:17,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:03:17,403 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:03:17,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:03:17,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:03:17,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:03:17,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:03:17,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:03:17,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:03:17,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:03:17,406 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:03:17,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:03:17,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:03:17,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:03:17,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:03:17,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:03:17,409 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:03:17,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:03:17,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:03:17,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:03:17,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:03:17,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:03:17,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:03:17,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:03:17,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:03:17,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:03:17,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:03:17,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:03:17,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:03:17,412 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:03:17,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:03:17,412 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:03:17,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b [2023-02-14 13:03:17,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:03:17,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:03:17,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:03:17,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:03:17,668 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:03:17,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition03-1.c [2023-02-14 13:03:18,783 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:03:18,919 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:03:18,920 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c [2023-02-14 13:03:18,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c5def0/6d8c8c74295649fa865cf9e2cb0176e3/FLAG034902120 [2023-02-14 13:03:18,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c5def0/6d8c8c74295649fa865cf9e2cb0176e3 [2023-02-14 13:03:18,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:03:18,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:03:18,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:03:18,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:03:18,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:03:18,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:03:18" (1/1) ... [2023-02-14 13:03:18,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ccc30c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:18, skipping insertion in model container [2023-02-14 13:03:18,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:03:18" (1/1) ... [2023-02-14 13:03:18,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:03:18,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:03:19,100 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/recursive/Addition03-1.c[840,853] [2023-02-14 13:03:19,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:03:19,110 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:03:19,127 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/recursive/Addition03-1.c[840,853] [2023-02-14 13:03:19,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:03:19,140 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:03:19,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19 WrapperNode [2023-02-14 13:03:19,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:03:19,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:03:19,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:03:19,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:03:19,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,168 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-14 13:03:19,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:03:19,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:03:19,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:03:19,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:03:19,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:03:19,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:03:19,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:03:19,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:03:19,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (1/1) ... [2023-02-14 13:03:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:03:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:19,238 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) [2023-02-14 13:03:19,245 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 [2023-02-14 13:03:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:03:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:03:19,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:03:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:03:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2023-02-14 13:03:19,279 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2023-02-14 13:03:19,336 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:03:19,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:03:19,498 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:03:19,503 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:03:19,503 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 13:03:19,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:03:19 BoogieIcfgContainer [2023-02-14 13:03:19,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:03:19,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:03:19,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:03:19,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:03:19,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:03:18" (1/3) ... [2023-02-14 13:03:19,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321803f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:03:19, skipping insertion in model container [2023-02-14 13:03:19,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:19" (2/3) ... [2023-02-14 13:03:19,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321803f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:03:19, skipping insertion in model container [2023-02-14 13:03:19,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:03:19" (3/3) ... [2023-02-14 13:03:19,512 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2023-02-14 13:03:19,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:03:19,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:03:19,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:03:19,573 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;@60809d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:03:19,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:03:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:03:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 13:03:19,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:19,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:19,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash -100249854, now seen corresponding path program 1 times [2023-02-14 13:03:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679565701] [2023-02-14 13:03:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:19,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:19,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679565701] [2023-02-14 13:03:19,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679565701] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:19,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:19,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:03:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214492549] [2023-02-14 13:03:19,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:03:19,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:03:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:03:19,923 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:20,036 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-14 13:03:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:03:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-02-14 13:03:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:20,046 INFO L225 Difference]: With dead ends: 32 [2023-02-14 13:03:20,046 INFO L226 Difference]: Without dead ends: 19 [2023-02-14 13:03:20,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:03:20,055 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:20,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-14 13:03:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-14 13:03:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:03:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-14 13:03:20,101 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-14 13:03:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:20,102 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-14 13:03:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-14 13:03:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 13:03:20,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:20,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:03:20,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2083914533, now seen corresponding path program 1 times [2023-02-14 13:03:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307828649] [2023-02-14 13:03:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:20,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307828649] [2023-02-14 13:03:20,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307828649] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:20,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:20,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:03:20,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781954199] [2023-02-14 13:03:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:20,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:03:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:03:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:03:20,236 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:20,280 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-02-14 13:03:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:03:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-14 13:03:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:20,282 INFO L225 Difference]: With dead ends: 29 [2023-02-14 13:03:20,283 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 13:03:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:03:20,290 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:20,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:03:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 13:03:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-02-14 13:03:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:03:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-14 13:03:20,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-14 13:03:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:20,308 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-14 13:03:20,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-14 13:03:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:03:20,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:20,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:20,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:03:20,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1402250658, now seen corresponding path program 1 times [2023-02-14 13:03:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:20,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199672548] [2023-02-14 13:03:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:03:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199672548] [2023-02-14 13:03:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199672548] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28550076] [2023-02-14 13:03:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:20,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:20,553 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) [2023-02-14 13:03:20,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:03:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 13:03:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:03:20,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:03:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28550076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:20,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:20,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-02-14 13:03:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156563424] [2023-02-14 13:03:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:03:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:03:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:03:20,874 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:03:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:20,986 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-02-14 13:03:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:03:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-02-14 13:03:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:20,988 INFO L225 Difference]: With dead ends: 54 [2023-02-14 13:03:20,988 INFO L226 Difference]: Without dead ends: 34 [2023-02-14 13:03:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-02-14 13:03:20,992 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:20,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-14 13:03:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-14 13:03:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 13:03:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-14 13:03:21,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2023-02-14 13:03:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:21,009 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-14 13:03:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:03:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-14 13:03:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 13:03:21,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:21,014 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:21,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:21,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1901242716, now seen corresponding path program 2 times [2023-02-14 13:03:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:21,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314423340] [2023-02-14 13:03:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:03:21,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314423340] [2023-02-14 13:03:21,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314423340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:21,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154119831] [2023-02-14 13:03:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:03:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:21,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:21,457 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) [2023-02-14 13:03:21,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:03:21,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:03:21,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:03:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 13:03:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:03:22,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154119831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:22,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:22,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2023-02-14 13:03:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140557694] [2023-02-14 13:03:22,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 13:03:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 13:03:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-02-14 13:03:22,111 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-14 13:03:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:22,295 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-02-14 13:03:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:03:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 31 [2023-02-14 13:03:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:22,297 INFO L225 Difference]: With dead ends: 46 [2023-02-14 13:03:22,297 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 13:03:22,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-02-14 13:03:22,298 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:22,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 66 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 13:03:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-02-14 13:03:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 13:03:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-02-14 13:03:22,304 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2023-02-14 13:03:22,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:22,304 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-02-14 13:03:22,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-14 13:03:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-02-14 13:03:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 13:03:22,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:22,305 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:22,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:03:22,506 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,SelfDestructingSolverStorable3 [2023-02-14 13:03:22,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2146751834, now seen corresponding path program 3 times [2023-02-14 13:03:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538714976] [2023-02-14 13:03:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 13:03:22,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538714976] [2023-02-14 13:03:22,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538714976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585099496] [2023-02-14 13:03:22,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:03:22,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:22,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:22,825 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) [2023-02-14 13:03:22,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:03:22,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 13:03:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 13:03:22,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-14 13:03:22,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:03:23,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585099496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:23,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:23,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2023-02-14 13:03:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037162061] [2023-02-14 13:03:23,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:23,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:03:23,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:03:23,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:03:23,918 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 13:03:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:24,070 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-02-14 13:03:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 13:03:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 45 [2023-02-14 13:03:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:24,076 INFO L225 Difference]: With dead ends: 52 [2023-02-14 13:03:24,076 INFO L226 Difference]: Without dead ends: 46 [2023-02-14 13:03:24,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2023-02-14 13:03:24,077 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:24,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 68 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-14 13:03:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-02-14 13:03:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 13:03:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-14 13:03:24,085 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2023-02-14 13:03:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:24,085 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-14 13:03:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 13:03:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-14 13:03:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:03:24,087 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:24,087 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:24,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:24,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:24,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -489684568, now seen corresponding path program 4 times [2023-02-14 13:03:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767308145] [2023-02-14 13:03:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-14 13:03:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767308145] [2023-02-14 13:03:24,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767308145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103355656] [2023-02-14 13:03:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:03:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:24,759 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) [2023-02-14 13:03:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:03:24,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:03:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 13:03:24,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-14 13:03:24,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 13:03:26,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103355656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:26,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:26,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2023-02-14 13:03:26,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126027323] [2023-02-14 13:03:26,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:26,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 13:03:26,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 13:03:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:03:26,843 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-14 13:03:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:27,042 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-02-14 13:03:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 13:03:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 59 [2023-02-14 13:03:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:27,050 INFO L225 Difference]: With dead ends: 58 [2023-02-14 13:03:27,050 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 13:03:27,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 13:03:27,052 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:27,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 96 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 13:03:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-02-14 13:03:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2023-02-14 13:03:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-02-14 13:03:27,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 59 [2023-02-14 13:03:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:27,070 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-02-14 13:03:27,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-14 13:03:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-02-14 13:03:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 13:03:27,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:27,073 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:27,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:27,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:27,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1199719510, now seen corresponding path program 5 times [2023-02-14 13:03:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090824633] [2023-02-14 13:03:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-14 13:03:27,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090824633] [2023-02-14 13:03:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090824633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548392198] [2023-02-14 13:03:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:03:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:27,885 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) [2023-02-14 13:03:27,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:03:27,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-14 13:03:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:03:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-14 13:03:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 13:03:31,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548392198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:31,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:31,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2023-02-14 13:03:31,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570348946] [2023-02-14 13:03:31,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:31,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 13:03:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 13:03:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2023-02-14 13:03:31,306 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-14 13:03:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:31,507 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2023-02-14 13:03:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 13:03:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) Word has length 73 [2023-02-14 13:03:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:31,513 INFO L225 Difference]: With dead ends: 64 [2023-02-14 13:03:31,514 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 13:03:31,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1095, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 13:03:31,517 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:31,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 13:03:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-02-14 13:03:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (16), 13 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-14 13:03:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-02-14 13:03:31,533 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 73 [2023-02-14 13:03:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:31,533 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-02-14 13:03:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-14 13:03:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-02-14 13:03:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 13:03:31,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:31,535 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:31,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:31,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1560921940, now seen corresponding path program 6 times [2023-02-14 13:03:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184780368] [2023-02-14 13:03:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-14 13:03:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184780368] [2023-02-14 13:03:32,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184780368] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:32,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302332283] [2023-02-14 13:03:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:03:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:32,729 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) [2023-02-14 13:03:32,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:03:32,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-14 13:03:32,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 13:03:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-14 13:03:33,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 13:03:37,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302332283] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:37,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:37,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2023-02-14 13:03:37,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341134736] [2023-02-14 13:03:37,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 13:03:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 13:03:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 13:03:37,980 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-14 13:03:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:38,210 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-02-14 13:03:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:03:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 87 [2023-02-14 13:03:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:38,212 INFO L225 Difference]: With dead ends: 70 [2023-02-14 13:03:38,212 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 13:03:38,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 169 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=719, Invalid=1443, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 13:03:38,214 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:38,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 132 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 13:03:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-02-14 13:03:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (18), 15 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-14 13:03:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-02-14 13:03:38,220 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 87 [2023-02-14 13:03:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:38,221 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-02-14 13:03:38,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-14 13:03:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-02-14 13:03:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-14 13:03:38,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:38,222 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:38,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:38,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:38,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1048271022, now seen corresponding path program 7 times [2023-02-14 13:03:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:38,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812954704] [2023-02-14 13:03:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-14 13:03:39,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812954704] [2023-02-14 13:03:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812954704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043808645] [2023-02-14 13:03:39,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 13:03:39,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:39,590 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) [2023-02-14 13:03:39,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:03:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 13:03:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-02-14 13:03:39,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-14 13:03:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043808645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:47,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:47,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2023-02-14 13:03:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715941482] [2023-02-14 13:03:47,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 13:03:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 13:03:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 13:03:47,241 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-14 13:03:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:47,519 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2023-02-14 13:03:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:03:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 101 [2023-02-14 13:03:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:47,521 INFO L225 Difference]: With dead ends: 76 [2023-02-14 13:03:47,521 INFO L226 Difference]: Without dead ends: 70 [2023-02-14 13:03:47,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 197 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=917, Invalid=1839, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 13:03:47,523 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:47,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-14 13:03:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-02-14 13:03:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (20), 17 states have call predecessors, (20), 4 states have call successors, (20) [2023-02-14 13:03:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-02-14 13:03:47,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 101 [2023-02-14 13:03:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:47,529 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-02-14 13:03:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-14 13:03:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-02-14 13:03:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-14 13:03:47,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:47,531 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:47,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2075065264, now seen corresponding path program 8 times [2023-02-14 13:03:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067052270] [2023-02-14 13:03:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:03:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:48,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:49,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-14 13:03:49,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:49,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067052270] [2023-02-14 13:03:49,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067052270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:49,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405733794] [2023-02-14 13:03:49,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:03:49,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:49,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:49,141 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) [2023-02-14 13:03:49,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:03:49,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:03:49,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 13:03:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-14 13:03:49,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 13:04:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405733794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:00,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:00,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 41 [2023-02-14 13:04:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544870438] [2023-02-14 13:04:00,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 13:04:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 13:04:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1203, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 13:04:00,866 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-14 13:04:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:01,156 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-02-14 13:04:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 13:04:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) Word has length 115 [2023-02-14 13:04:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:01,157 INFO L225 Difference]: With dead ends: 82 [2023-02-14 13:04:01,157 INFO L226 Difference]: Without dead ends: 76 [2023-02-14 13:04:01,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 225 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1139, Invalid=2283, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 13:04:01,159 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 150 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:04:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-14 13:04:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-02-14 13:04:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (22), 19 states have call predecessors, (22), 4 states have call successors, (22) [2023-02-14 13:04:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-02-14 13:04:01,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 115 [2023-02-14 13:04:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:01,166 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-02-14 13:04:01,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-14 13:04:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-02-14 13:04:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-14 13:04:01,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:01,168 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:01,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:01,375 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,SelfDestructingSolverStorable9 [2023-02-14 13:04:01,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -107806286, now seen corresponding path program 9 times [2023-02-14 13:04:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:01,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164721645] [2023-02-14 13:04:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-14 13:04:03,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:03,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164721645] [2023-02-14 13:04:03,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164721645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:03,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210998586] [2023-02-14 13:04:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:04:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:03,241 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) [2023-02-14 13:04:03,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:04:03,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-14 13:04:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 13:04:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2023-02-14 13:04:03,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-14 13:04:19,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210998586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:19,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:19,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 45 [2023-02-14 13:04:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460698983] [2023-02-14 13:04:19,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:19,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 13:04:19,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 13:04:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 13:04:19,271 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-14 13:04:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:19,592 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-02-14 13:04:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 13:04:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) Word has length 129 [2023-02-14 13:04:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:19,594 INFO L225 Difference]: With dead ends: 88 [2023-02-14 13:04:19,594 INFO L226 Difference]: Without dead ends: 82 [2023-02-14 13:04:19,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 253 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1385, Invalid=2775, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 13:04:19,598 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:19,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 163 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:04:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-14 13:04:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2023-02-14 13:04:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (24), 21 states have call predecessors, (24), 4 states have call successors, (24) [2023-02-14 13:04:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-02-14 13:04:19,616 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 129 [2023-02-14 13:04:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:19,618 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-02-14 13:04:19,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-14 13:04:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-02-14 13:04:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-14 13:04:19,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:19,621 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:19,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:19,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:19,836 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1602833076, now seen corresponding path program 10 times [2023-02-14 13:04:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130234351] [2023-02-14 13:04:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:20,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:21,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-14 13:04:22,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130234351] [2023-02-14 13:04:22,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130234351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172918224] [2023-02-14 13:04:22,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:04:22,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:22,025 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) [2023-02-14 13:04:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:04:22,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:04:22,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:22,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 13:04:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-02-14 13:04:22,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-14 13:04:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172918224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:45,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:45,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 49 [2023-02-14 13:04:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303739173] [2023-02-14 13:04:45,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 13:04:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 13:04:45,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1731, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 13:04:45,061 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-14 13:04:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:45,474 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-02-14 13:04:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 13:04:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) Word has length 143 [2023-02-14 13:04:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:45,476 INFO L225 Difference]: With dead ends: 94 [2023-02-14 13:04:45,476 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 13:04:45,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 281 SyntacticMatches, 19 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1655, Invalid=3315, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 13:04:45,479 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:45,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 187 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:04:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 13:04:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-02-14 13:04:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (26), 23 states have call predecessors, (26), 4 states have call successors, (26) [2023-02-14 13:04:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-02-14 13:04:45,492 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 143 [2023-02-14 13:04:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:45,493 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-02-14 13:04:45,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-14 13:04:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-02-14 13:04:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-14 13:04:45,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:45,497 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:45,709 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,SelfDestructingSolverStorable11 [2023-02-14 13:04:45,709 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1219250506, now seen corresponding path program 11 times [2023-02-14 13:04:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:45,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170102019] [2023-02-14 13:04:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:46,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:46,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-14 13:04:48,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170102019] [2023-02-14 13:04:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170102019] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814189430] [2023-02-14 13:04:48,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:04:48,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:48,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:48,509 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) [2023-02-14 13:04:48,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:04:49,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-14 13:04:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:49,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 13:04:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-02-14 13:04:49,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-14 13:05:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814189430] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:05:19,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:05:19,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 47] total 53 [2023-02-14 13:05:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954780294] [2023-02-14 13:05:19,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:19,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-14 13:05:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-14 13:05:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2031, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 13:05:19,787 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-14 13:05:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:20,183 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2023-02-14 13:05:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 13:05:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) Word has length 157 [2023-02-14 13:05:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:20,185 INFO L225 Difference]: With dead ends: 100 [2023-02-14 13:05:20,185 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 13:05:20,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 309 SyntacticMatches, 21 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1949, Invalid=3903, Unknown=0, NotChecked=0, Total=5852 [2023-02-14 13:05:20,187 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 230 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:20,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 195 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:05:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 13:05:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-02-14 13:05:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (28), 25 states have call predecessors, (28), 4 states have call successors, (28) [2023-02-14 13:05:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-02-14 13:05:20,192 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 157 [2023-02-14 13:05:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:20,192 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-02-14 13:05:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-14 13:05:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-02-14 13:05:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-02-14 13:05:20,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:20,194 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:20,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:20,408 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,SelfDestructingSolverStorable12 [2023-02-14 13:05:20,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:20,409 INFO L85 PathProgramCache]: Analyzing trace with hash -954980936, now seen corresponding path program 12 times [2023-02-14 13:05:20,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:20,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886186597] [2023-02-14 13:05:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:20,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:05:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:21,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:22,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-02-14 13:05:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:23,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886186597] [2023-02-14 13:05:23,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886186597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636419169] [2023-02-14 13:05:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:05:23,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:23,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:23,361 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) [2023-02-14 13:05:23,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:05:24,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-02-14 13:05:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 13:05:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-02-14 13:05:25,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:06:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-14 13:06:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636419169] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:06:04,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:06:04,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 51] total 57 [2023-02-14 13:06:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956405690] [2023-02-14 13:06:04,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:06:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 13:06:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:06:04,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 13:06:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2355, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 13:06:04,420 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-14 13:06:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:06:04,858 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2023-02-14 13:06:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 13:06:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) Word has length 171 [2023-02-14 13:06:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:06:04,861 INFO L225 Difference]: With dead ends: 106 [2023-02-14 13:06:04,861 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 13:06:04,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 337 SyntacticMatches, 23 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2267, Invalid=4539, Unknown=0, NotChecked=0, Total=6806 [2023-02-14 13:06:04,863 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:06:04,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 204 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:06:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 13:06:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-02-14 13:06:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 26 states have return successors, (30), 27 states have call predecessors, (30), 4 states have call successors, (30) [2023-02-14 13:06:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-14 13:06:04,868 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 171 [2023-02-14 13:06:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:06:04,869 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-14 13:06:04,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-14 13:06:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-14 13:06:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-02-14 13:06:04,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:06:04,870 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:06:04,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 13:06:05,077 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,SelfDestructingSolverStorable13 [2023-02-14 13:06:05,077 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:06:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:06:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1800173498, now seen corresponding path program 13 times [2023-02-14 13:06:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:06:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743253275] [2023-02-14 13:06:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:06:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:06:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:06:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:05,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:06:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-02-14 13:06:07,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:06:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743253275] [2023-02-14 13:06:07,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743253275] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:06:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414078098] [2023-02-14 13:06:07,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 13:06:07,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:06:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:06:07,969 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) [2023-02-14 13:06:07,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 13:06:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:06:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 13:06:10,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:06:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-02-14 13:06:10,217 INFO L328 TraceCheckSpWp]: Computing backward predicates...