./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_compare_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-examples/standard_compare_ground.i -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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:54:15,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:54:15,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:54:15,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:54:15,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:54:15,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:54:15,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:54:15,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:54:15,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:54:15,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:54:15,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:54:15,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:54:15,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:54:15,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:54:15,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:54:15,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:54:15,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:54:15,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:54:15,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:54:15,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:54:15,233 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:54:15,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:54:15,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:54:15,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:54:15,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:54:15,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:54:15,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:54:15,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:54:15,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:54:15,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:54:15,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:54:15,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:54:15,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:54:15,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:54:15,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:54:15,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:54:15,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:54:15,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:54:15,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:54:15,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:54:15,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:54:15,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:54:15,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:54:15,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:54:15,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:54:15,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:54:15,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:54:15,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:54:15,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:54:15,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:54:15,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:54:15,296 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:54:15,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:54:15,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:54:15,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:54:15,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:54:15,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:54:15,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:54:15,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:54:15,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:54:15,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:54:15,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:54:15,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:15,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:54:15,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:54:15,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:54:15,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:54:15,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:54:15,302 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:54:15,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:54:15,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:54:15,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2022-07-19 08:54:15,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:54:15,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:54:15,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:54:15,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:54:15,543 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:54:15,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-19 08:54:15,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693478147/50d379697f0b40fd89bde252434bb6f7/FLAG322bf0492 [2022-07-19 08:54:16,049 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:54:16,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-19 08:54:16,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693478147/50d379697f0b40fd89bde252434bb6f7/FLAG322bf0492 [2022-07-19 08:54:16,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693478147/50d379697f0b40fd89bde252434bb6f7 [2022-07-19 08:54:16,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:54:16,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:54:16,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:16,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:54:16,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:54:16,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f264638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16, skipping insertion in model container [2022-07-19 08:54:16,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:54:16,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:54:16,233 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-07-19 08:54:16,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:16,257 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:54:16,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-07-19 08:54:16,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:16,288 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:54:16,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16 WrapperNode [2022-07-19 08:54:16,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:16,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:16,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:54:16,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:54:16,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,315 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-19 08:54:16,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:16,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:54:16,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:54:16,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:54:16,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:54:16,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:54:16,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:54:16,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:54:16,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (1/1) ... [2022-07-19 08:54:16,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:16,356 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) [2022-07-19 08:54:16,358 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 [2022-07-19 08:54:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:54:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:54:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:54:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:54:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:54:16,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:54:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:54:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:54:16,436 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:54:16,438 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:54:16,597 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:54:16,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:54:16,602 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 08:54:16,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:16 BoogieIcfgContainer [2022-07-19 08:54:16,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:54:16,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:54:16,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:54:16,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:54:16,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:54:16" (1/3) ... [2022-07-19 08:54:16,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea74609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:16, skipping insertion in model container [2022-07-19 08:54:16,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:16" (2/3) ... [2022-07-19 08:54:16,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea74609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:16, skipping insertion in model container [2022-07-19 08:54:16,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:16" (3/3) ... [2022-07-19 08:54:16,611 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2022-07-19 08:54:16,637 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:54:16,638 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:54:16,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:54:16,712 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57d2884, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ab9da5e [2022-07-19 08:54:16,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:54:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 08:54:16,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:16,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:16,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2022-07-19 08:54:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932535854] [2022-07-19 08:54:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932535854] [2022-07-19 08:54:16,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932535854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:16,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:54:16,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:54:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744092125] [2022-07-19 08:54:16,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:54:16,975 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:17,004 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-07-19 08:54:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 08:54:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:17,013 INFO L225 Difference]: With dead ends: 36 [2022-07-19 08:54:17,014 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 08:54:17,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:54:17,027 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:17,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 08:54:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-19 08:54:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-19 08:54:17,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-19 08:54:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:17,056 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-19 08:54:17,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-19 08:54:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 08:54:17,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:17,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:54:17,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2022-07-19 08:54:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:17,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008525282] [2022-07-19 08:54:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008525282] [2022-07-19 08:54:17,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008525282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732697017] [2022-07-19 08:54:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:17,150 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) [2022-07-19 08:54:17,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:54:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:54:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:17,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:54:17,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732697017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:17,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:54:17,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:54:17,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922949192] [2022-07-19 08:54:17,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:17,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:17,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:17,250 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:17,265 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-19 08:54:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 08:54:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:17,268 INFO L225 Difference]: With dead ends: 26 [2022-07-19 08:54:17,270 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 08:54:17,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:17,272 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:17,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 08:54:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-19 08:54:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-19 08:54:17,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-19 08:54:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:17,286 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-19 08:54:17,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-19 08:54:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 08:54:17,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:17,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:17,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:17,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:17,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2022-07-19 08:54:17,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:17,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716453872] [2022-07-19 08:54:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716453872] [2022-07-19 08:54:17,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716453872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503246523] [2022-07-19 08:54:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:17,561 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) [2022-07-19 08:54:17,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:54:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:54:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:17,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:54:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503246523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:17,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:54:17,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:54:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753115801] [2022-07-19 08:54:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:17,624 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:17,632 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-19 08:54:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 08:54:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:17,633 INFO L225 Difference]: With dead ends: 27 [2022-07-19 08:54:17,633 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 08:54:17,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:17,635 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:17,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 08:54:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 08:54:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-19 08:54:17,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-07-19 08:54:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:17,639 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-19 08:54:17,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-19 08:54:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 08:54:17,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:17,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:17,862 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,SelfDestructingSolverStorable2 [2022-07-19 08:54:17,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2022-07-19 08:54:17,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351615898] [2022-07-19 08:54:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:17,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351615898] [2022-07-19 08:54:17,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351615898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708500276] [2022-07-19 08:54:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:17,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:17,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:17,916 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) [2022-07-19 08:54:17,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:54:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:54:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:18,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:18,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708500276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:18,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:18,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:54:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552911301] [2022-07-19 08:54:18,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:54:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:54:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:18,059 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:18,086 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-19 08:54:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:54:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 08:54:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:18,087 INFO L225 Difference]: With dead ends: 35 [2022-07-19 08:54:18,088 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 08:54:18,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:18,089 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:18,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 08:54:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 08:54:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-19 08:54:18,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-07-19 08:54:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:18,097 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-19 08:54:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-19 08:54:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 08:54:18,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:18,101 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:18,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 08:54:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:18,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:18,320 INFO L85 PathProgramCache]: Analyzing trace with hash -494561575, now seen corresponding path program 2 times [2022-07-19 08:54:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792934851] [2022-07-19 08:54:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 08:54:18,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792934851] [2022-07-19 08:54:18,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792934851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55161569] [2022-07-19 08:54:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:54:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:18,400 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) [2022-07-19 08:54:18,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:54:18,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:54:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:54:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:18,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55161569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:18,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:18,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-19 08:54:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293653804] [2022-07-19 08:54:18,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 08:54:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 08:54:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:18,562 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:18,607 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-07-19 08:54:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 08:54:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 08:54:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:18,608 INFO L225 Difference]: With dead ends: 52 [2022-07-19 08:54:18,608 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 08:54:18,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:18,609 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:18,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 08:54:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-07-19 08:54:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-19 08:54:18,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2022-07-19 08:54:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:18,621 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-19 08:54:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-19 08:54:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 08:54:18,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:18,622 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:18,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 08:54:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:18,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 451448930, now seen corresponding path program 3 times [2022-07-19 08:54:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440299486] [2022-07-19 08:54:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:54:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440299486] [2022-07-19 08:54:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440299486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471077349] [2022-07-19 08:54:18,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:54:18,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:18,981 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) [2022-07-19 08:54:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:54:19,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 08:54:19,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 08:54:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:54:19,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:54:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471077349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:19,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:19,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-19 08:54:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369491717] [2022-07-19 08:54:19,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:19,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 08:54:19,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 08:54:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:19,153 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:19,251 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-07-19 08:54:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 08:54:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 08:54:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:19,253 INFO L225 Difference]: With dead ends: 68 [2022-07-19 08:54:19,253 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 08:54:19,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:19,254 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:19,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 08:54:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-19 08:54:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-19 08:54:19,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 35 [2022-07-19 08:54:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:19,266 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-19 08:54:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-19 08:54:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 08:54:19,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:19,267 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:19,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:19,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:19,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 678799712, now seen corresponding path program 4 times [2022-07-19 08:54:19,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219104716] [2022-07-19 08:54:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:54:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219104716] [2022-07-19 08:54:19,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219104716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829507765] [2022-07-19 08:54:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:54:19,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:19,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:19,684 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) [2022-07-19 08:54:19,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 08:54:19,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:54:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 08:54:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:54:19,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:54:20,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829507765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:20,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:20,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-19 08:54:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967219904] [2022-07-19 08:54:20,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 08:54:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 08:54:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-19 08:54:20,037 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:20,127 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-07-19 08:54:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 08:54:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 08:54:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:20,133 INFO L225 Difference]: With dead ends: 105 [2022-07-19 08:54:20,133 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 08:54:20,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-19 08:54:20,135 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:20,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 08:54:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-19 08:54:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-19 08:54:20,156 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 49 [2022-07-19 08:54:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:20,156 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-19 08:54:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-19 08:54:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 08:54:20,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:20,161 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:20,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 08:54:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:20,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash -408162682, now seen corresponding path program 5 times [2022-07-19 08:54:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51594029] [2022-07-19 08:54:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:54:20,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51594029] [2022-07-19 08:54:20,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51594029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043552434] [2022-07-19 08:54:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:54:20,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:20,791 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) [2022-07-19 08:54:20,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 08:55:00,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-19 08:55:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:55:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 08:55:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:55:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:55:00,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:55:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:55:01,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043552434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:55:01,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:55:01,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-19 08:55:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145251731] [2022-07-19 08:55:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:55:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 08:55:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:55:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 08:55:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 08:55:01,413 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:55:01,568 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2022-07-19 08:55:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 08:55:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-19 08:55:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:55:01,570 INFO L225 Difference]: With dead ends: 157 [2022-07-19 08:55:01,571 INFO L226 Difference]: Without dead ends: 130 [2022-07-19 08:55:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 08:55:01,573 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:55:01,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 54 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:55:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-19 08:55:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-19 08:55:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-07-19 08:55:01,595 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 75 [2022-07-19 08:55:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:55:01,595 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-07-19 08:55:01,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-07-19 08:55:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 08:55:01,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:55:01,613 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:55:01,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 08:55:01,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:01,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:55:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:55:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1135775314, now seen corresponding path program 6 times [2022-07-19 08:55:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:55:01,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188625183] [2022-07-19 08:55:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:55:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 08:55:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:55:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188625183] [2022-07-19 08:55:03,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188625183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:55:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261771828] [2022-07-19 08:55:03,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 08:55:03,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:03,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:55:03,028 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) [2022-07-19 08:55:03,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 08:55:03,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 08:55:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:55:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 08:55:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:55:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-19 08:55:03,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:55:04,002 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-19 08:55:04,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-19 08:55:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-19 08:55:04,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261771828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:55:04,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:55:04,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 8, 7] total 63 [2022-07-19 08:55:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147359413] [2022-07-19 08:55:04,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:55:04,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-19 08:55:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:55:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-19 08:55:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=2495, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 08:55:04,071 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:55:05,832 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-07-19 08:55:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 08:55:05,833 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-19 08:55:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:55:05,834 INFO L225 Difference]: With dead ends: 165 [2022-07-19 08:55:05,834 INFO L226 Difference]: Without dead ends: 138 [2022-07-19 08:55:05,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4197, Invalid=9609, Unknown=0, NotChecked=0, Total=13806 [2022-07-19 08:55:05,841 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:55:05,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 63 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:55:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-19 08:55:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-07-19 08:55:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-07-19 08:55:05,856 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2022-07-19 08:55:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:55:05,857 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-07-19 08:55:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-07-19 08:55:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-19 08:55:05,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:55:05,860 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:55:05,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 08:55:06,084 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,SelfDestructingSolverStorable8 [2022-07-19 08:55:06,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:55:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:55:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2019846662, now seen corresponding path program 1 times [2022-07-19 08:55:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:55:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459689988] [2022-07-19 08:55:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:55:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:55:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459689988] [2022-07-19 08:55:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459689988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:55:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595839985] [2022-07-19 08:55:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:07,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:55:07,309 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) [2022-07-19 08:55:07,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 08:55:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 08:55:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:55:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:07,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:55:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:10,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595839985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:55:10,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:55:10,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-19 08:55:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425577768] [2022-07-19 08:55:10,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:55:10,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-19 08:55:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:55:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-19 08:55:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 08:55:10,382 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:55:10,677 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-07-19 08:55:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-19 08:55:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-07-19 08:55:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:55:10,679 INFO L225 Difference]: With dead ends: 269 [2022-07-19 08:55:10,679 INFO L226 Difference]: Without dead ends: 240 [2022-07-19 08:55:10,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 08:55:10,682 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 08:55:10,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 106 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 08:55:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-19 08:55:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-19 08:55:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-07-19 08:55:10,693 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 133 [2022-07-19 08:55:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:55:10,694 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-07-19 08:55:10,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-07-19 08:55:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-19 08:55:10,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:55:10,697 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:55:10,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 08:55:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 08:55:10,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:55:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:55:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash -651492388, now seen corresponding path program 2 times [2022-07-19 08:55:10,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:55:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416355360] [2022-07-19 08:55:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:10,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:55:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:14,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:55:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416355360] [2022-07-19 08:55:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416355360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:55:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377141791] [2022-07-19 08:55:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:55:14,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:55:14,764 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) [2022-07-19 08:55:14,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 08:55:15,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:55:15,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:55:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-19 08:55:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:55:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:15,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:55:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:25,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377141791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:55:25,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:55:25,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-19 08:55:25,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226751263] [2022-07-19 08:55:25,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:55:25,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-19 08:55:25,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:55:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-19 08:55:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-19 08:55:25,668 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:55:26,520 INFO L93 Difference]: Finished difference Result 481 states and 590 transitions. [2022-07-19 08:55:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-19 08:55:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-07-19 08:55:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:55:26,523 INFO L225 Difference]: With dead ends: 481 [2022-07-19 08:55:26,523 INFO L226 Difference]: Without dead ends: 452 [2022-07-19 08:55:26,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-19 08:55:26,528 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 08:55:26,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 106 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 08:55:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-19 08:55:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-07-19 08:55:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.0066518847006651) internal successors, (454), 451 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 454 transitions. [2022-07-19 08:55:26,541 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 454 transitions. Word has length 239 [2022-07-19 08:55:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:55:26,541 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 454 transitions. [2022-07-19 08:55:26,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:55:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 454 transitions. [2022-07-19 08:55:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-19 08:55:26,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:55:26,548 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:55:26,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 08:55:26,771 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,SelfDestructingSolverStorable10 [2022-07-19 08:55:26,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:55:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:55:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1634761464, now seen corresponding path program 3 times [2022-07-19 08:55:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:55:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937042544] [2022-07-19 08:55:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:26,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:55:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-19 08:55:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:55:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937042544] [2022-07-19 08:55:40,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937042544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:55:40,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867378436] [2022-07-19 08:55:40,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:55:40,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:55:40,540 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) [2022-07-19 08:55:40,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 08:55:41,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 08:55:41,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:55:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 08:55:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:55:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 43707 trivial. 0 not checked. [2022-07-19 08:55:42,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:55:43,248 INFO L356 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-07-19 08:55:43,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-07-19 08:55:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 44126 trivial. 0 not checked. [2022-07-19 08:55:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867378436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:55:43,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:55:43,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 11, 9] total 228 [2022-07-19 08:55:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776230737] [2022-07-19 08:55:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:55:43,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-07-19 08:55:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:55:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-07-19 08:55:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22840, Invalid=28916, Unknown=0, NotChecked=0, Total=51756 [2022-07-19 08:55:43,429 INFO L87 Difference]: Start difference. First operand 452 states and 454 transitions. Second operand has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:56:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:56:00,133 INFO L93 Difference]: Finished difference Result 491 states and 496 transitions. [2022-07-19 08:56:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-07-19 08:56:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 451 [2022-07-19 08:56:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:56:00,135 INFO L225 Difference]: With dead ends: 491 [2022-07-19 08:56:00,136 INFO L226 Difference]: Without dead ends: 462 [2022-07-19 08:56:00,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1327 GetRequests, 886 SyntacticMatches, 1 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27088 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=67812, Invalid=127110, Unknown=0, NotChecked=0, Total=194922 [2022-07-19 08:56:00,146 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 08:56:00,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 154 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 08:56:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-19 08:56:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-07-19 08:56:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.0065645514223194) internal successors, (460), 457 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:56:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 460 transitions. [2022-07-19 08:56:00,160 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 460 transitions. Word has length 451 [2022-07-19 08:56:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:56:00,161 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 460 transitions. [2022-07-19 08:56:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:56:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 460 transitions. [2022-07-19 08:56:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-07-19 08:56:00,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:56:00,168 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:56:00,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 08:56:00,386 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,SelfDestructingSolverStorable11 [2022-07-19 08:56:00,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:56:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:56:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash 792090300, now seen corresponding path program 4 times [2022-07-19 08:56:00,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:56:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279885790] [2022-07-19 08:56:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:56:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:56:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:56:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 08:56:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:56:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279885790] [2022-07-19 08:56:14,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279885790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:56:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814699390] [2022-07-19 08:56:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:56:14,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:56:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:56:14,262 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) [2022-07-19 08:56:14,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 08:56:15,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:56:15,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:56:15,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 3735 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-19 08:56:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:56:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 08:56:15,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:56:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 08:56:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814699390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:56:55,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:56:55,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-07-19 08:56:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117928440] [2022-07-19 08:56:55,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:56:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-07-19 08:56:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:56:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-07-19 08:56:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-19 08:56:56,003 INFO L87 Difference]: Start difference. First operand 458 states and 460 transitions. Second operand has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:57:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:57:01,316 INFO L93 Difference]: Finished difference Result 917 states and 1133 transitions. [2022-07-19 08:57:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-07-19 08:57:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 457 [2022-07-19 08:57:01,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:57:01,320 INFO L225 Difference]: With dead ends: 917 [2022-07-19 08:57:01,320 INFO L226 Difference]: Without dead ends: 884 [2022-07-19 08:57:01,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-19 08:57:01,330 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 636 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 08:57:01,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 145 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 08:57:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-19 08:57:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-07-19 08:57:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.0033975084937712) internal successors, (886), 883 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:57:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 886 transitions. [2022-07-19 08:57:01,355 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 886 transitions. Word has length 457 [2022-07-19 08:57:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:57:01,356 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 886 transitions. [2022-07-19 08:57:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:57:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 886 transitions. [2022-07-19 08:57:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-07-19 08:57:01,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:57:01,364 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:57:01,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 08:57:01,579 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,SelfDestructingSolverStorable12 [2022-07-19 08:57:01,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:57:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:57:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash -341191598, now seen corresponding path program 5 times [2022-07-19 08:57:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:57:01,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612769667] [2022-07-19 08:57:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:57:01,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:57:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:57:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 179835 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 08:57:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:57:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612769667] [2022-07-19 08:57:56,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612769667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:57:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910659208] [2022-07-19 08:57:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:57:56,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:57:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:57:56,483 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) [2022-07-19 08:57:56,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process