./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array26_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-patterns/array26_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:47:35,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:47:35,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:47:35,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:47:35,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:47:35,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:47:35,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:47:35,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:47:35,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:47:35,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:47:35,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:47:35,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:47:35,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:47:35,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:47:35,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:47:35,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:47:35,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:47:35,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:47:35,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:47:35,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:47:35,237 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:47:35,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:47:35,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:47:35,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:47:35,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:47:35,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:47:35,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:47:35,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:47:35,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:47:35,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:47:35,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:47:35,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:47:35,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:47:35,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:47:35,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:47:35,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:47:35,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:47:35,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:47:35,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:47:35,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:47:35,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:47:35,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:47:35,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:47:35,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:47:35,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:47:35,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:47:35,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:47:35,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:47:35,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:47:35,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:47:35,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:47:35,270 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:47:35,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:47:35,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:47:35,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:47:35,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:47:35,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:47:35,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:47:35,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:47:35,273 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:47:35,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:47:35,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:47:35,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2022-07-13 10:47:35,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:47:35,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:47:35,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:47:35,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:47:35,473 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:47:35,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array26_pattern.c [2022-07-13 10:47:35,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b84f525b/b28f820ec64443308bcebe6329077b85/FLAG22c5f62af [2022-07-13 10:47:35,876 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:47:35,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c [2022-07-13 10:47:35,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b84f525b/b28f820ec64443308bcebe6329077b85/FLAG22c5f62af [2022-07-13 10:47:35,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b84f525b/b28f820ec64443308bcebe6329077b85 [2022-07-13 10:47:35,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:47:35,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:47:35,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:47:35,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:47:35,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:47:35,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:47:35" (1/1) ... [2022-07-13 10:47:35,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8549202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:35, skipping insertion in model container [2022-07-13 10:47:35,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:47:35" (1/1) ... [2022-07-13 10:47:35,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:47:35,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:47:36,021 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-patterns/array26_pattern.c[1324,1337] [2022-07-13 10:47:36,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:47:36,038 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:47:36,046 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-patterns/array26_pattern.c[1324,1337] [2022-07-13 10:47:36,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:47:36,061 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:47:36,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36 WrapperNode [2022-07-13 10:47:36,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:47:36,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:47:36,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:47:36,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:47:36,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,092 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-07-13 10:47:36,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:47:36,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:47:36,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:47:36,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:47:36,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:47:36,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:47:36,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:47:36,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:47:36,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (1/1) ... [2022-07-13 10:47:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:47:36,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:36,152 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) [2022-07-13 10:47:36,171 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 [2022-07-13 10:47:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:47:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:47:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:47:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:47:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:47:36,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:47:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:47:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:47:36,231 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:47:36,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:47:36,345 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:47:36,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:47:36,349 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 10:47:36,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:47:36 BoogieIcfgContainer [2022-07-13 10:47:36,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:47:36,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:47:36,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:47:36,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:47:36,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:47:35" (1/3) ... [2022-07-13 10:47:36,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433d43b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:47:36, skipping insertion in model container [2022-07-13 10:47:36,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:47:36" (2/3) ... [2022-07-13 10:47:36,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433d43b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:47:36, skipping insertion in model container [2022-07-13 10:47:36,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:47:36" (3/3) ... [2022-07-13 10:47:36,356 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2022-07-13 10:47:36,365 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:47:36,366 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:47:36,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:47:36,398 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@7a4e1f9b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57cb9588 [2022-07-13 10:47:36,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:47:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-07-13 10:47:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 10:47:36,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:36,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:36,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:36,428 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2022-07-13 10:47:36,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514102989] [2022-07-13 10:47:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:47:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514102989] [2022-07-13 10:47:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514102989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:47:36,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:47:36,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:47:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951495591] [2022-07-13 10:47:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:47:36,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:47:36,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:47:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:47:36,600 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:36,613 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2022-07-13 10:47:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:47:36,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 10:47:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:36,621 INFO L225 Difference]: With dead ends: 43 [2022-07-13 10:47:36,621 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 10:47:36,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:47:36,631 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:36,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:47:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 10:47:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 10:47:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-13 10:47:36,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-07-13 10:47:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:36,662 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-13 10:47:36,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-13 10:47:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 10:47:36,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:36,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:36,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:47:36,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2022-07-13 10:47:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:36,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458034699] [2022-07-13 10:47:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:36,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:36,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952981484] [2022-07-13 10:47:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:36,700 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) [2022-07-13 10:47:36,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:47:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 10:47:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:47:36,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:47:36,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458034699] [2022-07-13 10:47:36,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:47:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952981484] [2022-07-13 10:47:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952981484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:47:36,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:47:36,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:47:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808770822] [2022-07-13 10:47:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:47:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:47:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:47:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:47:36,807 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-13 10:47:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:36,823 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-13 10:47:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:47:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 10:47:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:36,826 INFO L225 Difference]: With dead ends: 26 [2022-07-13 10:47:36,827 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 10:47:36,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:47:36,828 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:36,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:47:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 10:47:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 10:47:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-07-13 10:47:36,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2022-07-13 10:47:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:36,833 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-07-13 10:47:36,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-13 10:47:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-07-13 10:47:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 10:47:36,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:36,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:47:37,043 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 [2022-07-13 10:47:37,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2022-07-13 10:47:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:37,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411246334] [2022-07-13 10:47:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:37,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:37,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426273133] [2022-07-13 10:47:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:37,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:37,055 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) [2022-07-13 10:47:37,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:47:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:47:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:47:37,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:47:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411246334] [2022-07-13 10:47:37,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:47:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426273133] [2022-07-13 10:47:37,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426273133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:47:37,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:47:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:47:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863467039] [2022-07-13 10:47:37,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:47:37,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:47:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:37,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:47:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:47:37,121 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:37,182 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-07-13 10:47:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:47:37,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 10:47:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:37,183 INFO L225 Difference]: With dead ends: 54 [2022-07-13 10:47:37,183 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 10:47:37,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:47:37,184 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:47:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 10:47:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-07-13 10:47:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-07-13 10:47:37,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 15 [2022-07-13 10:47:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:37,190 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-07-13 10:47:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-07-13 10:47:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 10:47:37,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:37,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:37,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:47:37,409 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 [2022-07-13 10:47:37,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2022-07-13 10:47:37,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:37,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923968593] [2022-07-13 10:47:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:37,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:37,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984856095] [2022-07-13 10:47:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:37,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:37,428 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) [2022-07-13 10:47:37,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:47:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:47:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:47:37,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:47:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923968593] [2022-07-13 10:47:37,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:47:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984856095] [2022-07-13 10:47:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984856095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:47:37,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:47:37,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:47:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952023220] [2022-07-13 10:47:37,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:47:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:47:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:47:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:47:37,496 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:37,547 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2022-07-13 10:47:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:47:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 10:47:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:37,550 INFO L225 Difference]: With dead ends: 54 [2022-07-13 10:47:37,550 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 10:47:37,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:47:37,554 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:37,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:47:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 10:47:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-07-13 10:47:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-13 10:47:37,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2022-07-13 10:47:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:37,572 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-13 10:47:37,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-13 10:47:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:47:37,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:37,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:37,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:47:37,783 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 [2022-07-13 10:47:37,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2022-07-13 10:47:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:37,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604362999] [2022-07-13 10:47:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:37,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914755703] [2022-07-13 10:47:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:37,800 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) [2022-07-13 10:47:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:47:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:47:37,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:47:37,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:47:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:47:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604362999] [2022-07-13 10:47:37,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:47:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914755703] [2022-07-13 10:47:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914755703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:47:37,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:47:37,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-07-13 10:47:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987684600] [2022-07-13 10:47:37,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:47:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:47:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:47:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:47:37,945 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:38,082 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2022-07-13 10:47:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:47:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 10:47:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:38,084 INFO L225 Difference]: With dead ends: 65 [2022-07-13 10:47:38,084 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 10:47:38,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:47:38,086 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:38,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 26 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:47:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 10:47:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-07-13 10:47:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2022-07-13 10:47:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-13 10:47:38,095 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2022-07-13 10:47:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:38,095 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-13 10:47:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-13 10:47:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 10:47:38,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:38,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:38,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:47:38,321 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 [2022-07-13 10:47:38,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2022-07-13 10:47:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:38,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674470930] [2022-07-13 10:47:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:38,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:38,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883608434] [2022-07-13 10:47:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:38,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:38,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:38,337 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) [2022-07-13 10:47:38,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:47:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:38,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:47:38,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 10:47:38,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:47:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 10:47:38,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:47:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674470930] [2022-07-13 10:47:38,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:47:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883608434] [2022-07-13 10:47:38,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883608434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:47:38,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:47:38,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-07-13 10:47:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683832128] [2022-07-13 10:47:38,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:47:38,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:47:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:47:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:47:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:47:38,484 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:47:38,718 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2022-07-13 10:47:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 10:47:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 10:47:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:47:38,719 INFO L225 Difference]: With dead ends: 113 [2022-07-13 10:47:38,719 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 10:47:38,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:47:38,720 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:47:38,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 47 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:47:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 10:47:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2022-07-13 10:47:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 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) [2022-07-13 10:47:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2022-07-13 10:47:38,725 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 27 [2022-07-13 10:47:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:47:38,726 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2022-07-13 10:47:38,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:47:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2022-07-13 10:47:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 10:47:38,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:47:38,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:47:38,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:47:38,927 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 [2022-07-13 10:47:38,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:47:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:47:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 1 times [2022-07-13 10:47:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:47:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347413306] [2022-07-13 10:47:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:47:38,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:47:38,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035990344] [2022-07-13 10:47:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:47:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:47:38,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:47:38,939 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) [2022-07-13 10:47:38,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:47:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:47:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-13 10:47:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:47:39,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2022-07-13 10:47:39,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-13 10:47:39,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-13 10:47:39,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2022-07-13 10:47:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:47:39,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 163 [2022-07-13 10:47:39,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-13 10:47:39,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 151 [2022-07-13 10:47:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:47:39,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:39,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 199 [2022-07-13 10:47:39,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-13 10:47:40,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 107 [2022-07-13 10:47:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 145 [2022-07-13 10:47:40,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 42 [2022-07-13 10:47:40,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:47:40,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:47:40,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 41 [2022-07-13 10:47:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:47:40,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:47:58,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-13 10:47:58,539 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:47:58,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-07-13 10:47:58,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-07-13 10:48:00,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:48:00,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-13 10:48:28,680 WARN L233 SmtUtils]: Spent 27.96s on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-13 10:48:28,682 INFO L356 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2022-07-13 10:48:28,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 4829205 treesize of output 4542792 [2022-07-13 10:48:36,661 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 3585 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 10:48:36,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:48:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347413306] [2022-07-13 10:48:36,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:48:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035990344] [2022-07-13 10:48:36,705 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 10:48:36,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:36,919 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 [2022-07-13 10:48:36,920 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:545) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:348) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-13 10:48:36,922 INFO L158 Benchmark]: Toolchain (without parser) took 61029.18ms. Allocated memory was 119.5MB in the beginning and 295.7MB in the end (delta: 176.2MB). Free memory was 89.0MB in the beginning and 169.2MB in the end (delta: -80.3MB). Peak memory consumption was 175.2MB. Max. memory is 16.1GB. [2022-07-13 10:48:36,922 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 10:48:36,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.19ms. Allocated memory is still 119.5MB. Free memory was 88.7MB in the beginning and 93.1MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 10:48:36,923 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.45ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 91.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 10:48:36,923 INFO L158 Benchmark]: Boogie Preprocessor took 29.15ms. Allocated memory is still 119.5MB. Free memory was 91.4MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 10:48:36,923 INFO L158 Benchmark]: RCFGBuilder took 227.67ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 79.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 10:48:36,923 INFO L158 Benchmark]: TraceAbstraction took 60570.35ms. Allocated memory was 119.5MB in the beginning and 295.7MB in the end (delta: 176.2MB). Free memory was 78.4MB in the beginning and 169.2MB in the end (delta: -90.9MB). Peak memory consumption was 165.7MB. Max. memory is 16.1GB. [2022-07-13 10:48:36,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.19ms. Allocated memory is still 119.5MB. Free memory was 88.7MB in the beginning and 93.1MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.45ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 91.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.15ms. Allocated memory is still 119.5MB. Free memory was 91.4MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 227.67ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 79.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 60570.35ms. Allocated memory was 119.5MB in the beginning and 295.7MB in the end (delta: 176.2MB). Free memory was 78.4MB in the beginning and 169.2MB in the end (delta: -90.9MB). Peak memory consumption was 165.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-13 10:48:36,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-patterns/array26_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:48:38,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:48:38,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:48:38,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:48:38,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:48:38,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:48:38,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:48:38,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:48:38,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:48:38,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:48:38,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:48:38,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:48:38,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:48:38,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:48:38,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:48:38,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:48:38,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:48:38,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:48:38,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:48:38,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:48:38,513 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:48:38,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:48:38,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:48:38,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:48:38,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:48:38,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:48:38,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:48:38,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:48:38,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:48:38,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:48:38,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:48:38,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:48:38,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:48:38,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:48:38,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:48:38,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:48:38,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:48:38,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:48:38,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:48:38,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:48:38,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:48:38,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:48:38,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 10:48:38,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:48:38,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:48:38,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:48:38,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:48:38,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:48:38,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:48:38,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:48:38,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:48:38,558 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:48:38,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:48:38,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:48:38,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:48:38,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:48:38,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:48:38,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 10:48:38,566 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2022-07-13 10:48:38,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:48:38,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:48:38,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:48:38,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:48:38,800 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:48:38,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array26_pattern.c [2022-07-13 10:48:38,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40c05c21/d3efb0387505475297a8f55f4d7967f9/FLAG6929e5edf [2022-07-13 10:48:39,239 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:48:39,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c [2022-07-13 10:48:39,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40c05c21/d3efb0387505475297a8f55f4d7967f9/FLAG6929e5edf [2022-07-13 10:48:39,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40c05c21/d3efb0387505475297a8f55f4d7967f9 [2022-07-13 10:48:39,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:48:39,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:48:39,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:48:39,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:48:39,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:48:39,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20dab067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39, skipping insertion in model container [2022-07-13 10:48:39,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:48:39,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:48:39,392 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-patterns/array26_pattern.c[1324,1337] [2022-07-13 10:48:39,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:48:39,420 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:48:39,445 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-patterns/array26_pattern.c[1324,1337] [2022-07-13 10:48:39,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:48:39,473 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:48:39,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39 WrapperNode [2022-07-13 10:48:39,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:48:39,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:48:39,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:48:39,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:48:39,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,505 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-13 10:48:39,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:48:39,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:48:39,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:48:39,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:48:39,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:48:39,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:48:39,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:48:39,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:48:39,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (1/1) ... [2022-07-13 10:48:39,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:48:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:48:39,561 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) [2022-07-13 10:48:39,578 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 [2022-07-13 10:48:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:48:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 10:48:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:48:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 10:48:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:48:39,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:48:39,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:48:39,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 10:48:39,642 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:48:39,643 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:48:39,863 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:48:39,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:48:39,867 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 10:48:39,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:48:39 BoogieIcfgContainer [2022-07-13 10:48:39,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:48:39,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:48:39,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:48:39,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:48:39,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:48:39" (1/3) ... [2022-07-13 10:48:39,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:48:39, skipping insertion in model container [2022-07-13 10:48:39,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:48:39" (2/3) ... [2022-07-13 10:48:39,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:48:39, skipping insertion in model container [2022-07-13 10:48:39,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:48:39" (3/3) ... [2022-07-13 10:48:39,878 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2022-07-13 10:48:39,887 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:48:39,887 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:48:39,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:48:39,944 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@3c31103d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a6ef876 [2022-07-13 10:48:39,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:48:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-07-13 10:48:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 10:48:39,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:39,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:39,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:39,961 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2022-07-13 10:48:39,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:39,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028342411] [2022-07-13 10:48:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:39,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:39,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:39,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 10:48:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 10:48:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:48:40,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:48:40,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028342411] [2022-07-13 10:48:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028342411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:48:40,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:48:40,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:48:40,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7657565] [2022-07-13 10:48:40,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:48:40,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:48:40,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:48:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:48:40,061 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:40,070 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2022-07-13 10:48:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:48:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 10:48:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:40,075 INFO L225 Difference]: With dead ends: 43 [2022-07-13 10:48:40,075 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 10:48:40,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:48:40,079 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:40,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:48:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 10:48:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 10:48:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-13 10:48:40,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-07-13 10:48:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:40,097 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-13 10:48:40,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-13 10:48:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 10:48:40,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:40,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:40,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:40,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:40,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2022-07-13 10:48:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824946707] [2022-07-13 10:48:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:40,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:40,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:40,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 10:48:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:48:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:48:40,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:48:40,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:40,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824946707] [2022-07-13 10:48:40,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824946707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:48:40,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:48:40,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:48:40,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904214258] [2022-07-13 10:48:40,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:48:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:48:40,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:48:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:48:40,420 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-13 10:48:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:40,448 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-13 10:48:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:48:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 10:48:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:40,449 INFO L225 Difference]: With dead ends: 26 [2022-07-13 10:48:40,449 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 10:48:40,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:48:40,450 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:40,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:48:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 10:48:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 10:48:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-07-13 10:48:40,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2022-07-13 10:48:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:40,458 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-07-13 10:48:40,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-07-13 10:48:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-07-13 10:48:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 10:48:40,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:40,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:40,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:40,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2022-07-13 10:48:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330527973] [2022-07-13 10:48:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:40,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:40,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:40,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 10:48:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:40,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:48:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:40,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:48:40,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:40,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330527973] [2022-07-13 10:48:40,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330527973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:48:40,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:48:40,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:48:40,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623818480] [2022-07-13 10:48:40,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:48:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:48:40,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:48:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:48:40,875 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:40,881 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-07-13 10:48:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:48:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 10:48:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:40,882 INFO L225 Difference]: With dead ends: 35 [2022-07-13 10:48:40,882 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 10:48:40,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:48:40,884 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:40,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2022-07-13 10:48:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 10:48:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 10:48:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2022-07-13 10:48:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-13 10:48:40,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2022-07-13 10:48:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:40,890 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-13 10:48:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-13 10:48:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 10:48:40,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:40,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:40,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:41,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:41,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2022-07-13 10:48:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995096112] [2022-07-13 10:48:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:41,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:41,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:41,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 10:48:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:48:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:41,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:48:41,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995096112] [2022-07-13 10:48:41,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995096112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:48:41,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:48:41,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:48:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415945106] [2022-07-13 10:48:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:48:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:48:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:48:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:48:41,258 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:41,261 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-07-13 10:48:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:48:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 10:48:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:41,261 INFO L225 Difference]: With dead ends: 42 [2022-07-13 10:48:41,262 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 10:48:41,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:48:41,262 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:41,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-13 10:48:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 10:48:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 10:48:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-13 10:48:41,265 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2022-07-13 10:48:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:41,265 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 10:48:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-13 10:48:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:48:41,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:41,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:41,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:41,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:41,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2022-07-13 10:48:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595262958] [2022-07-13 10:48:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:41,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:41,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:41,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 10:48:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:48:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:41,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:41,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595262958] [2022-07-13 10:48:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595262958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:41,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:41,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:48:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683816955] [2022-07-13 10:48:41,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:48:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:48:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:41,763 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2022-07-13 10:48:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:41,868 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2022-07-13 10:48:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:48:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 10:48:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:41,870 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:48:41,870 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:48:41,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:41,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:41,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-13 10:48:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:48:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 10:48:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2022-07-13 10:48:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-13 10:48:41,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2022-07-13 10:48:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:41,874 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-13 10:48:41,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2022-07-13 10:48:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-13 10:48:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 10:48:41,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:41,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:41,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:42,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:42,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1090691504, now seen corresponding path program 1 times [2022-07-13 10:48:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234930898] [2022-07-13 10:48:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:42,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:42,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:42,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:42,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 10:48:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:48:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:42,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:48:42,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234930898] [2022-07-13 10:48:42,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234930898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:48:42,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:48:42,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:48:42,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172356664] [2022-07-13 10:48:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:48:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:48:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:48:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:48:42,154 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-13 10:48:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:42,294 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-07-13 10:48:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:48:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 10:48:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:42,295 INFO L225 Difference]: With dead ends: 57 [2022-07-13 10:48:42,295 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 10:48:42,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:48:42,296 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:42,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:48:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 10:48:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-07-13 10:48:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2022-07-13 10:48:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-13 10:48:42,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-07-13 10:48:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:42,300 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-13 10:48:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-13 10:48:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-13 10:48:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 10:48:42,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:42,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:42,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:42,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:42,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262791, now seen corresponding path program 2 times [2022-07-13 10:48:42,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471727578] [2022-07-13 10:48:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:48:42,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:42,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:42,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 10:48:42,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:48:42,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:48:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:42,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:42,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471727578] [2022-07-13 10:48:42,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471727578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:42,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:42,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-13 10:48:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941535721] [2022-07-13 10:48:42,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 10:48:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 10:48:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:48:42,621 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:42,897 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-13 10:48:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:48:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 10:48:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:42,900 INFO L225 Difference]: With dead ends: 108 [2022-07-13 10:48:42,900 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 10:48:42,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:48:42,901 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:42,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:48:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 10:48:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 39. [2022-07-13 10:48:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2022-07-13 10:48:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-13 10:48:42,907 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 24 [2022-07-13 10:48:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:42,907 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-13 10:48:42,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-13 10:48:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 10:48:42,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:42,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:42,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-13 10:48:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:43,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846008, now seen corresponding path program 1 times [2022-07-13 10:48:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:43,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259633921] [2022-07-13 10:48:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:43,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:43,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 10:48:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 10:48:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:43,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:48:43,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259633921] [2022-07-13 10:48:43,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259633921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:43,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:43,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 10:48:43,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494273280] [2022-07-13 10:48:43,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:43,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:48:43,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:43,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:48:43,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:48:43,718 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-07-13 10:48:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:43,879 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-13 10:48:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:48:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 25 [2022-07-13 10:48:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:43,880 INFO L225 Difference]: With dead ends: 72 [2022-07-13 10:48:43,880 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 10:48:43,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:48:43,881 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:43,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-13 10:48:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 10:48:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-07-13 10:48:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 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) [2022-07-13 10:48:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2022-07-13 10:48:43,887 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 25 [2022-07-13 10:48:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:43,888 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2022-07-13 10:48:43,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-07-13 10:48:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2022-07-13 10:48:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:48:43,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:43,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:43,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:44,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash -951111360, now seen corresponding path program 2 times [2022-07-13 10:48:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600669907] [2022-07-13 10:48:44,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:48:44,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:44,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:44,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:44,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 10:48:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:48:44,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:48:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:48:44,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:48:44,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600669907] [2022-07-13 10:48:44,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600669907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:44,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:44,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:48:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112558023] [2022-07-13 10:48:44,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:48:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:48:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:44,442 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:44,522 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-07-13 10:48:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:48:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-13 10:48:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:44,523 INFO L225 Difference]: With dead ends: 74 [2022-07-13 10:48:44,523 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 10:48:44,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:44,524 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:44,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 40 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-13 10:48:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 10:48:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-07-13 10:48:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 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) [2022-07-13 10:48:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-07-13 10:48:44,529 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 28 [2022-07-13 10:48:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:44,529 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-07-13 10:48:44,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-07-13 10:48:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 10:48:44,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:44,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:44,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:44,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:44,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1650975208, now seen corresponding path program 3 times [2022-07-13 10:48:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983807470] [2022-07-13 10:48:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:48:44,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:44,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:44,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:44,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 10:48:44,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 10:48:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:48:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 10:48:44,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 10:48:45,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983807470] [2022-07-13 10:48:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983807470] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:45,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:48:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272454956] [2022-07-13 10:48:45,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:48:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:48:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:45,031 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-13 10:48:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:45,045 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2022-07-13 10:48:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:48:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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 31 [2022-07-13 10:48:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:45,047 INFO L225 Difference]: With dead ends: 71 [2022-07-13 10:48:45,047 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 10:48:45,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:45,048 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-07-13 10:48:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 10:48:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-07-13 10:48:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-07-13 10:48:45,053 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 31 [2022-07-13 10:48:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:45,054 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-07-13 10:48:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-13 10:48:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-07-13 10:48:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 10:48:45,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:45,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:45,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:45,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:45,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1152885147, now seen corresponding path program 4 times [2022-07-13 10:48:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180544763] [2022-07-13 10:48:45,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:48:45,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:45,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:45,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 10:48:45,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:48:45,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:48:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:48:45,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:48:45,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180544763] [2022-07-13 10:48:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180544763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:45,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:45,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-07-13 10:48:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063251270] [2022-07-13 10:48:45,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 10:48:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 10:48:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-13 10:48:45,688 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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) [2022-07-13 10:48:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:45,791 INFO L93 Difference]: Finished difference Result 141 states and 191 transitions. [2022-07-13 10:48:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 10:48:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 34 [2022-07-13 10:48:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:45,792 INFO L225 Difference]: With dead ends: 141 [2022-07-13 10:48:45,792 INFO L226 Difference]: Without dead ends: 100 [2022-07-13 10:48:45,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:48:45,793 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:45,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 60 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-07-13 10:48:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-13 10:48:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-07-13 10:48:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.336734693877551) internal successors, (131), 98 states have internal predecessors, (131), 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) [2022-07-13 10:48:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2022-07-13 10:48:45,804 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 34 [2022-07-13 10:48:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:45,805 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2022-07-13 10:48:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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) [2022-07-13 10:48:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2022-07-13 10:48:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 10:48:45,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:45,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:45,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:46,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1026825090, now seen corresponding path program 5 times [2022-07-13 10:48:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:46,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851070496] [2022-07-13 10:48:46,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:48:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:46,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:46,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 10:48:46,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 10:48:46,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 10:48:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 10:48:46,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 10:48:46,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851070496] [2022-07-13 10:48:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851070496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:46,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:46,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2022-07-13 10:48:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103588336] [2022-07-13 10:48:46,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:48:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:48:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:46,178 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:46,846 INFO L93 Difference]: Finished difference Result 291 states and 400 transitions. [2022-07-13 10:48:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:48:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-13 10:48:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:46,847 INFO L225 Difference]: With dead ends: 291 [2022-07-13 10:48:46,847 INFO L226 Difference]: Without dead ends: 226 [2022-07-13 10:48:46,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:48:46,848 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:46,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 147 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:48:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-13 10:48:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 142. [2022-07-13 10:48:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.297872340425532) internal successors, (183), 141 states have internal predecessors, (183), 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) [2022-07-13 10:48:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 183 transitions. [2022-07-13 10:48:46,870 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 183 transitions. Word has length 34 [2022-07-13 10:48:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:46,871 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 183 transitions. [2022-07-13 10:48:46,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 183 transitions. [2022-07-13 10:48:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:48:46,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:46,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:46,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:47,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:47,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1885299364, now seen corresponding path program 1 times [2022-07-13 10:48:47,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:47,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023081397] [2022-07-13 10:48:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:48:47,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:47,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:47,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:47,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 10:48:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:48:47,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:48:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:48:47,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:48:47,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023081397] [2022-07-13 10:48:47,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023081397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:47,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:47,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-13 10:48:47,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785304428] [2022-07-13 10:48:47,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:47,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 10:48:47,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 10:48:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:48:47,201 INFO L87 Difference]: Start difference. First operand 142 states and 183 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:47,409 INFO L93 Difference]: Finished difference Result 413 states and 540 transitions. [2022-07-13 10:48:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:48:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 10:48:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:47,412 INFO L225 Difference]: With dead ends: 413 [2022-07-13 10:48:47,412 INFO L226 Difference]: Without dead ends: 296 [2022-07-13 10:48:47,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:48:47,413 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:47,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 78 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:48:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-13 10:48:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 192. [2022-07-13 10:48:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 191 states have internal predecessors, (241), 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) [2022-07-13 10:48:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 241 transitions. [2022-07-13 10:48:47,424 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 241 transitions. Word has length 35 [2022-07-13 10:48:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:47,424 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 241 transitions. [2022-07-13 10:48:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 241 transitions. [2022-07-13 10:48:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:48:47,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:47,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:47,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:47,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:47,634 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1179822861, now seen corresponding path program 6 times [2022-07-13 10:48:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:47,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574521784] [2022-07-13 10:48:47,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:48:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:47,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:47,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:47,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 10:48:47,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 10:48:47,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 10:48:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:48:47,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:48:48,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574521784] [2022-07-13 10:48:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574521784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:48,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:48,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2022-07-13 10:48:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596953070] [2022-07-13 10:48:48,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 10:48:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 10:48:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-13 10:48:48,208 INFO L87 Difference]: Start difference. First operand 192 states and 241 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2022-07-13 10:48:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:48,493 INFO L93 Difference]: Finished difference Result 435 states and 553 transitions. [2022-07-13 10:48:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:48:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 [2022-07-13 10:48:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:48,497 INFO L225 Difference]: With dead ends: 435 [2022-07-13 10:48:48,497 INFO L226 Difference]: Without dead ends: 268 [2022-07-13 10:48:48,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:48:48,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:48,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-13 10:48:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-13 10:48:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 221. [2022-07-13 10:48:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.268181818181818) internal successors, (279), 220 states have internal predecessors, (279), 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) [2022-07-13 10:48:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 279 transitions. [2022-07-13 10:48:48,510 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 279 transitions. Word has length 35 [2022-07-13 10:48:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:48,510 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 279 transitions. [2022-07-13 10:48:48,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2022-07-13 10:48:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 279 transitions. [2022-07-13 10:48:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 10:48:48,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:48,511 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:48,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-13 10:48:48,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:48,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash -863664749, now seen corresponding path program 2 times [2022-07-13 10:48:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322935528] [2022-07-13 10:48:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:48:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:48,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:48,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 10:48:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:48:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:48:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:48:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:48:49,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322935528] [2022-07-13 10:48:49,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322935528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:49,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:49,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2022-07-13 10:48:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3887010] [2022-07-13 10:48:49,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:48:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:48:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:48:49,171 INFO L87 Difference]: Start difference. First operand 221 states and 279 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:49,224 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2022-07-13 10:48:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 10:48:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 10:48:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:49,225 INFO L225 Difference]: With dead ends: 258 [2022-07-13 10:48:49,226 INFO L226 Difference]: Without dead ends: 233 [2022-07-13 10:48:49,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:48:49,226 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:49,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-07-13 10:48:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-13 10:48:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2022-07-13 10:48:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.2633928571428572) internal successors, (283), 224 states have internal predecessors, (283), 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) [2022-07-13 10:48:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 283 transitions. [2022-07-13 10:48:49,239 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 283 transitions. Word has length 36 [2022-07-13 10:48:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:49,239 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 283 transitions. [2022-07-13 10:48:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 283 transitions. [2022-07-13 10:48:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 10:48:49,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:49,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:49,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-13 10:48:49,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:49,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1097748183, now seen corresponding path program 3 times [2022-07-13 10:48:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:49,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95793903] [2022-07-13 10:48:49,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:48:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:49,450 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:49,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 10:48:49,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 10:48:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:48:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 10:48:49,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-13 10:48:49,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95793903] [2022-07-13 10:48:49,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95793903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:49,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:48:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901518554] [2022-07-13 10:48:49,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:49,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:48:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:48:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:49,780 INFO L87 Difference]: Start difference. First operand 225 states and 283 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:49,802 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2022-07-13 10:48:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:48:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-13 10:48:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:49,804 INFO L225 Difference]: With dead ends: 239 [2022-07-13 10:48:49,804 INFO L226 Difference]: Without dead ends: 235 [2022-07-13 10:48:49,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:48:49,804 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:49,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-13 10:48:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-13 10:48:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 146. [2022-07-13 10:48:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 145 states have internal predecessors, (181), 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) [2022-07-13 10:48:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2022-07-13 10:48:49,814 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 40 [2022-07-13 10:48:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:49,815 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2022-07-13 10:48:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:48:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2022-07-13 10:48:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 10:48:49,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:49,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:49,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:50,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:50,021 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 421760628, now seen corresponding path program 4 times [2022-07-13 10:48:50,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:50,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126612890] [2022-07-13 10:48:50,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:48:50,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:50,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:50,023 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:50,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 10:48:50,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:48:50,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:48:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:48:50,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:48:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:48:50,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 10:48:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126612890] [2022-07-13 10:48:50,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126612890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:48:50,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:48:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-07-13 10:48:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668058293] [2022-07-13 10:48:50,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:48:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 10:48:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 10:48:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 10:48:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-13 10:48:50,513 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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) [2022-07-13 10:48:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:48:50,746 INFO L93 Difference]: Finished difference Result 415 states and 517 transitions. [2022-07-13 10:48:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:48:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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 41 [2022-07-13 10:48:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:48:50,748 INFO L225 Difference]: With dead ends: 415 [2022-07-13 10:48:50,748 INFO L226 Difference]: Without dead ends: 392 [2022-07-13 10:48:50,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:48:50,749 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:48:50,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 59 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-07-13 10:48:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-13 10:48:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 226. [2022-07-13 10:48:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.271111111111111) internal successors, (286), 225 states have internal predecessors, (286), 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) [2022-07-13 10:48:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 286 transitions. [2022-07-13 10:48:50,771 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 286 transitions. Word has length 41 [2022-07-13 10:48:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:48:50,771 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 286 transitions. [2022-07-13 10:48:50,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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) [2022-07-13 10:48:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 286 transitions. [2022-07-13 10:48:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 10:48:50,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:48:50,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:48:50,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:48:50,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 10:48:50,982 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:48:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:48:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 5 times [2022-07-13 10:48:50,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 10:48:50,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094409838] [2022-07-13 10:48:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:48:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 10:48:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 10:48:50,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 10:48:50,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-13 10:48:51,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-13 10:48:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:48:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 10:48:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:48:51,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-07-13 10:48:51,913 INFO L356 Elim1Store]: treesize reduction 70, result has 20.5 percent of original size [2022-07-13 10:48:51,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-07-13 10:48:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:53,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:53,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:48:53,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2022-07-13 10:48:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:54,175 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:48:54,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 72 [2022-07-13 10:48:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:48:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:48:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:48:58,958 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:48:58,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 30 [2022-07-13 10:48:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:48:59,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:49:25,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 515 treesize of output 499 [2022-07-13 10:49:26,731 INFO L356 Elim1Store]: treesize reduction 87, result has 1.1 percent of original size [2022-07-13 10:49:26,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 59990191195 treesize of output 58580905051