./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/vogal-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:31:22,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:31:22,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:31:22,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:31:22,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:31:22,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:31:22,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:31:22,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:31:22,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:31:22,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:31:22,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:31:22,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:31:22,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:31:22,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:31:22,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:31:22,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:31:22,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:31:22,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:31:22,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:31:22,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:31:22,287 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:31:22,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:31:22,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:31:22,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:31:22,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:31:22,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:31:22,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:31:22,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:31:22,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:31:22,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:31:22,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:31:22,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:31:22,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:31:22,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:31:22,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:31:22,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:31:22,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:31:22,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:31:22,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:31:22,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:31:22,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:31:22,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:31:22,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:31:22,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:31:22,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:31:22,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:31:22,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:31:22,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:31:22,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:31:22,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:31:22,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:31:22,341 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:31:22,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:31:22,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:31:22,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:31:22,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:31:22,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:31:22,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:31:22,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:31:22,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:31:22,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:31:22,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:31:22,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:31:22,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:31:22,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:31:22,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:31:22,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:31:22,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:31:22,345 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:31:22,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:31:22,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:31:22,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-07-21 02:31:22,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:31:22,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:31:22,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:31:22,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:31:22,612 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:31:22,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-1.i [2022-07-21 02:31:22,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249e851b6/56fc9f629d9a419eab284bedc69b2f6e/FLAG793110be8 [2022-07-21 02:31:23,050 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:31:23,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2022-07-21 02:31:23,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249e851b6/56fc9f629d9a419eab284bedc69b2f6e/FLAG793110be8 [2022-07-21 02:31:23,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249e851b6/56fc9f629d9a419eab284bedc69b2f6e [2022-07-21 02:31:23,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:31:23,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:31:23,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:31:23,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:31:23,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:31:23,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e2a677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23, skipping insertion in model container [2022-07-21 02:31:23,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:31:23,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:31:23,224 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/loops/vogal-1.i[895,908] [2022-07-21 02:31:23,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:31:23,280 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:31:23,290 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/loops/vogal-1.i[895,908] [2022-07-21 02:31:23,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:31:23,327 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:31:23,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23 WrapperNode [2022-07-21 02:31:23,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:31:23,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:31:23,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:31:23,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:31:23,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,376 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-07-21 02:31:23,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:31:23,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:31:23,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:31:23,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:31:23,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:31:23,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:31:23,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:31:23,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:31:23,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (1/1) ... [2022-07-21 02:31:23,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:31:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:23,436 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) [2022-07-21 02:31:23,441 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 [2022-07-21 02:31:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:31:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:31:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 02:31:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 02:31:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:31:23,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:31:23,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:31:23,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:31:23,558 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:31:23,559 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:31:23,768 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:31:23,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:31:23,773 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 02:31:23,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:23 BoogieIcfgContainer [2022-07-21 02:31:23,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:31:23,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:31:23,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:31:23,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:31:23,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:31:23" (1/3) ... [2022-07-21 02:31:23,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50afc739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:23, skipping insertion in model container [2022-07-21 02:31:23,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:23" (2/3) ... [2022-07-21 02:31:23,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50afc739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:23, skipping insertion in model container [2022-07-21 02:31:23,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:23" (3/3) ... [2022-07-21 02:31:23,780 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-07-21 02:31:23,792 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:31:23,793 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:31:23,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:31:23,854 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@59bebbdb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41e4a08c [2022-07-21 02:31:23,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:31:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) [2022-07-21 02:31:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 02:31:23,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:23,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:23,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:23,869 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-07-21 02:31:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:23,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321694342] [2022-07-21 02:31:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:31:24,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:24,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321694342] [2022-07-21 02:31:24,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321694342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:31:24,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:31:24,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:31:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781514887] [2022-07-21 02:31:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:24,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:31:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:24,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:31:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:31:24,043 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:24,057 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-07-21 02:31:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:31:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 02:31:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:24,064 INFO L225 Difference]: With dead ends: 54 [2022-07-21 02:31:24,064 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:31:24,066 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 [2022-07-21 02:31:24,071 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2022-07-21 02:31:24,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:31:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 02:31:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-21 02:31:24,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-07-21 02:31:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:24,096 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-21 02:31:24,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-21 02:31:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 02:31:24,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:24,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:24,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:31:24,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-07-21 02:31:24,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:24,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90240023] [2022-07-21 02:31:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:31:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90240023] [2022-07-21 02:31:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90240023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:31:24,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:31:24,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:31:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625234103] [2022-07-21 02:31:24,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:24,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:31:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:31:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:31:24,167 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-21 02:31:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:24,195 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-21 02:31:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:31:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2022-07-21 02:31:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:24,196 INFO L225 Difference]: With dead ends: 64 [2022-07-21 02:31:24,196 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:31:24,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:31:24,197 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:24,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:31:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-07-21 02:31:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2022-07-21 02:31:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-21 02:31:24,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-07-21 02:31:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:24,202 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-21 02:31:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-21 02:31:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-21 02:31:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 02:31:24,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:24,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:31:24,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-07-21 02:31:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:24,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982836043] [2022-07-21 02:31:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:31:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982836043] [2022-07-21 02:31:24,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982836043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799612096] [2022-07-21 02:31:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:24,269 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) [2022-07-21 02:31:24,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:31:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:31:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:31:24,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:31:24,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799612096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:31:24,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:31:24,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-07-21 02:31:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542193622] [2022-07-21 02:31:24,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:24,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:31:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:31:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:31:24,386 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-21 02:31:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:24,423 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-21 02:31:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:31:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2022-07-21 02:31:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:24,424 INFO L225 Difference]: With dead ends: 52 [2022-07-21 02:31:24,424 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 02:31:24,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:31:24,425 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:24,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 02:31:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-07-21 02:31:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 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) [2022-07-21 02:31:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-07-21 02:31:24,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-07-21 02:31:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:24,433 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-07-21 02:31:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-21 02:31:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-07-21 02:31:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:31:24,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:24,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:24,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:24,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:24,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-07-21 02:31:24,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:24,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329195096] [2022-07-21 02:31:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:31:24,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329195096] [2022-07-21 02:31:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329195096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567877973] [2022-07-21 02:31:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:24,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:24,738 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) [2022-07-21 02:31:24,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:31:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:31:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:31:24,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:31:24,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567877973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:31:24,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:31:24,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-07-21 02:31:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833155221] [2022-07-21 02:31:24,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:31:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:31:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:31:24,843 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:24,872 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-07-21 02:31:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:31:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 02:31:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:24,874 INFO L225 Difference]: With dead ends: 97 [2022-07-21 02:31:24,874 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 02:31:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:31:24,875 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:24,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 02:31:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-07-21 02:31:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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) [2022-07-21 02:31:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-21 02:31:24,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-07-21 02:31:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:24,887 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-21 02:31:24,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-21 02:31:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 02:31:24,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:24,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:24,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 02:31:25,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-07-21 02:31:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384287779] [2022-07-21 02:31:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:25,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:31:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384287779] [2022-07-21 02:31:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384287779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143517466] [2022-07-21 02:31:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:25,150 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) [2022-07-21 02:31:25,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:31:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:31:25,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:25,247 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 11 treesize of output 7 [2022-07-21 02:31:25,329 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 15 treesize of output 7 [2022-07-21 02:31:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:31:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:31:25,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143517466] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:25,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:31:25,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-07-21 02:31:25,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750328840] [2022-07-21 02:31:25,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:31:25,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:31:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:31:25,471 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-21 02:31:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:25,567 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-07-21 02:31:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:31:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-21 02:31:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:25,568 INFO L225 Difference]: With dead ends: 61 [2022-07-21 02:31:25,568 INFO L226 Difference]: Without dead ends: 40 [2022-07-21 02:31:25,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:31:25,569 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:25,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-21 02:31:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-21 02:31:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-21 02:31:25,573 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-07-21 02:31:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:25,573 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-21 02:31:25,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-21 02:31:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-21 02:31:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 02:31:25,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:25,574 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:25,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:25,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:25,794 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-07-21 02:31:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:25,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055677442] [2022-07-21 02:31:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:31:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:25,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055677442] [2022-07-21 02:31:25,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055677442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:25,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167479089] [2022-07-21 02:31:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:25,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:25,847 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) [2022-07-21 02:31:25,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:31:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:31:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:25,907 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 11 treesize of output 7 [2022-07-21 02:31:25,999 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 16 treesize of output 8 [2022-07-21 02:31:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:31:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 02:31:26,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167479089] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:26,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:31:26,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-07-21 02:31:26,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573476651] [2022-07-21 02:31:26,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:26,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:31:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:31:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:31:26,125 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:26,233 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-21 02:31:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:31:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-21 02:31:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:26,235 INFO L225 Difference]: With dead ends: 66 [2022-07-21 02:31:26,235 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 02:31:26,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:31:26,237 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:26,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 02:31:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-07-21 02:31:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-07-21 02:31:26,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-07-21 02:31:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:26,246 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-07-21 02:31:26,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-07-21 02:31:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 02:31:26,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:26,247 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, 1] [2022-07-21 02:31:26,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:26,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-07-21 02:31:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581155180] [2022-07-21 02:31:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 02:31:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:26,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581155180] [2022-07-21 02:31:26,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581155180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:26,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347939156] [2022-07-21 02:31:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:26,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:26,498 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) [2022-07-21 02:31:26,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:31:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:31:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 02:31:26,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:31:26,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347939156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:26,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:26,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-07-21 02:31:26,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414822399] [2022-07-21 02:31:26,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:26,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:31:26,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:31:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:31:26,595 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2022-07-21 02:31:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:26,771 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-07-21 02:31:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 02:31:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 02:31:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:26,772 INFO L225 Difference]: With dead ends: 220 [2022-07-21 02:31:26,772 INFO L226 Difference]: Without dead ends: 183 [2022-07-21 02:31:26,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:31:26,773 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:26,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:31:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-21 02:31:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-07-21 02:31:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-07-21 02:31:26,778 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-07-21 02:31:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:26,778 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-07-21 02:31:26,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2022-07-21 02:31:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-07-21 02:31:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 02:31:26,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:26,779 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:26,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:26,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-07-21 02:31:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:26,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425900343] [2022-07-21 02:31:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 02:31:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425900343] [2022-07-21 02:31:27,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425900343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:27,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233078857] [2022-07-21 02:31:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:31:27,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:27,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:27,053 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) [2022-07-21 02:31:27,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:31:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:31:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:31:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 02:31:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 02:31:27,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:31:27,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233078857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:27,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:27,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2022-07-21 02:31:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237837867] [2022-07-21 02:31:27,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:27,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:31:27,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:31:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:31:27,178 INFO L87 Difference]: Start difference. First operand 48 states and 61 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) [2022-07-21 02:31:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:27,613 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2022-07-21 02:31:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 02:31:27,614 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 30 [2022-07-21 02:31:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:27,616 INFO L225 Difference]: With dead ends: 390 [2022-07-21 02:31:27,616 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 02:31:27,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:31:27,617 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 634 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:27,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:31:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 02:31:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2022-07-21 02:31:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 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) [2022-07-21 02:31:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-07-21 02:31:27,626 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2022-07-21 02:31:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:27,627 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-07-21 02:31:27,627 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) [2022-07-21 02:31:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-07-21 02:31:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 02:31:27,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:27,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:27,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:27,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-07-21 02:31:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248333287] [2022-07-21 02:31:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 02:31:27,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248333287] [2022-07-21 02:31:27,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248333287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569074074] [2022-07-21 02:31:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:27,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:27,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:27,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:31:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:31:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 02:31:27,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:31:27,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569074074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:31:27,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:31:27,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-21 02:31:27,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617972471] [2022-07-21 02:31:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:27,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:31:27,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:31:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:31:27,975 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:27,991 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-07-21 02:31:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:31:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-21 02:31:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:27,995 INFO L225 Difference]: With dead ends: 94 [2022-07-21 02:31:27,995 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 02:31:27,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:31:27,997 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:27,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 02:31:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-07-21 02:31:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-07-21 02:31:28,008 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2022-07-21 02:31:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-07-21 02:31:28,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-07-21 02:31:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 02:31:28,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:28,012 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:28,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:28,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:28,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2022-07-21 02:31:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885423801] [2022-07-21 02:31:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:31:28,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885423801] [2022-07-21 02:31:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885423801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589882749] [2022-07-21 02:31:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:31:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:28,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:31:28,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:31:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:31:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 02:31:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:28,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-07-21 02:31:28,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:31:28,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:31:28,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-21 02:31:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 02:31:28,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:28,634 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 02:31:28,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-07-21 02:31:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 02:31:28,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589882749] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:28,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:31:28,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2022-07-21 02:31:28,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962744400] [2022-07-21 02:31:28,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:31:28,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:31:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:31:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:31:28,637 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:28,726 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-07-21 02:31:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:31:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 02:31:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:28,727 INFO L225 Difference]: With dead ends: 90 [2022-07-21 02:31:28,727 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 02:31:28,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:31:28,728 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:28,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:31:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 02:31:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-21 02:31:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-07-21 02:31:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-21 02:31:28,742 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-07-21 02:31:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:28,742 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-21 02:31:28,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-21 02:31:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:31:28,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:28,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:28,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:28,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 02:31:28,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-07-21 02:31:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:28,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122271792] [2022-07-21 02:31:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:31:29,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:29,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122271792] [2022-07-21 02:31:29,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122271792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786091051] [2022-07-21 02:31:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:29,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:29,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:29,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:29,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:31:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 02:31:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 02:31:29,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 02:31:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786091051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:29,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:29,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-07-21 02:31:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178943997] [2022-07-21 02:31:29,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 02:31:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 02:31:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:31:29,198 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2022-07-21 02:31:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:29,872 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2022-07-21 02:31:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 02:31:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 [2022-07-21 02:31:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:29,874 INFO L225 Difference]: With dead ends: 432 [2022-07-21 02:31:29,874 INFO L226 Difference]: Without dead ends: 382 [2022-07-21 02:31:29,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 02:31:29,876 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 459 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:29,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 926 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:31:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-21 02:31:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2022-07-21 02:31:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 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) [2022-07-21 02:31:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-07-21 02:31:29,889 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2022-07-21 02:31:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:29,889 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-07-21 02:31:29,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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) [2022-07-21 02:31:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-07-21 02:31:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 02:31:29,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:29,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:29,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:30,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-07-21 02:31:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596867273] [2022-07-21 02:31:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:31:30,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:30,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596867273] [2022-07-21 02:31:30,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596867273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:30,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006989802] [2022-07-21 02:31:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:30,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:30,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:30,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:30,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:31:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 02:31:30,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:30,388 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 02:31:30,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-21 02:31:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 02:31:30,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:30,575 INFO L356 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2022-07-21 02:31:30,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-07-21 02:31:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:31:30,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006989802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:30,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:30,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-07-21 02:31:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317989781] [2022-07-21 02:31:30,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:30,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 02:31:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 02:31:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:31:30,766 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:31,729 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2022-07-21 02:31:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 02:31:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-21 02:31:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:31,731 INFO L225 Difference]: With dead ends: 549 [2022-07-21 02:31:31,731 INFO L226 Difference]: Without dead ends: 491 [2022-07-21 02:31:31,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 02:31:31,732 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 610 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:31,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:31:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-21 02:31:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2022-07-21 02:31:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 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) [2022-07-21 02:31:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-07-21 02:31:31,746 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2022-07-21 02:31:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:31,746 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-07-21 02:31:31,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:31:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-07-21 02:31:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 02:31:31,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:31,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:31,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:31,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 02:31:31,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-07-21 02:31:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:31,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129379059] [2022-07-21 02:31:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:31,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:31:31,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129379059] [2022-07-21 02:31:31,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129379059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19825864] [2022-07-21 02:31:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:31,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:31,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:31,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:31,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:31:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 02:31:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:32,201 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:31:32,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-07-21 02:31:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:31:32,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:32,381 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-07-21 02:31:32,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-07-21 02:31:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19825864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:32,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:32,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-07-21 02:31:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390040646] [2022-07-21 02:31:32,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 02:31:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 02:31:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:31:32,581 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 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) [2022-07-21 02:31:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:33,004 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-07-21 02:31:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 02:31:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 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 [2022-07-21 02:31:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:33,005 INFO L225 Difference]: With dead ends: 313 [2022-07-21 02:31:33,006 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 02:31:33,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:31:33,009 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:33,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:31:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 02:31:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2022-07-21 02:31:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 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) [2022-07-21 02:31:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-07-21 02:31:33,030 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2022-07-21 02:31:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:33,031 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-07-21 02:31:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 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) [2022-07-21 02:31:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-07-21 02:31:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:31:33,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:33,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:33,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 02:31:33,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-07-21 02:31:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:33,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38141778] [2022-07-21 02:31:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38141778] [2022-07-21 02:31:33,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38141778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318692735] [2022-07-21 02:31:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:31:33,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:33,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:33,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 02:31:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:31:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:31:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 02:31:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 02:31:33,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:33,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318692735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:33,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:33,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-07-21 02:31:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32294186] [2022-07-21 02:31:33,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 02:31:33,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 02:31:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:31:33,711 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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) [2022-07-21 02:31:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:34,547 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2022-07-21 02:31:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 02:31:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 46 [2022-07-21 02:31:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:34,549 INFO L225 Difference]: With dead ends: 537 [2022-07-21 02:31:34,549 INFO L226 Difference]: Without dead ends: 531 [2022-07-21 02:31:34,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 02:31:34,550 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:34,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1147 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 02:31:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-21 02:31:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2022-07-21 02:31:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 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) [2022-07-21 02:31:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2022-07-21 02:31:34,586 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2022-07-21 02:31:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:34,586 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2022-07-21 02:31:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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) [2022-07-21 02:31:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2022-07-21 02:31:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:31:34,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:34,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:34,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 02:31:34,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-07-21 02:31:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996191707] [2022-07-21 02:31:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 02:31:35,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996191707] [2022-07-21 02:31:35,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996191707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035783085] [2022-07-21 02:31:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:35,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:35,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 02:31:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 02:31:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:38,602 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-21 02:31:38,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-07-21 02:31:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:31:39,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:40,120 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-21 02:31:40,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 226 treesize of output 1 [2022-07-21 02:31:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:40,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035783085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:40,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:40,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2022-07-21 02:31:40,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157065839] [2022-07-21 02:31:40,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:40,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:31:40,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:31:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:31:40,128 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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) [2022-07-21 02:31:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:41,611 INFO L93 Difference]: Finished difference Result 311 states and 402 transitions. [2022-07-21 02:31:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 02:31:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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 46 [2022-07-21 02:31:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:41,613 INFO L225 Difference]: With dead ends: 311 [2022-07-21 02:31:41,614 INFO L226 Difference]: Without dead ends: 249 [2022-07-21 02:31:41,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 02:31:41,617 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:41,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 369 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2022-07-21 02:31:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-21 02:31:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-07-21 02:31:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.288702928870293) internal successors, (308), 239 states have internal predecessors, (308), 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) [2022-07-21 02:31:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 308 transitions. [2022-07-21 02:31:41,662 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 308 transitions. Word has length 46 [2022-07-21 02:31:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:41,664 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 308 transitions. [2022-07-21 02:31:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 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) [2022-07-21 02:31:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 308 transitions. [2022-07-21 02:31:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:31:41,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:41,665 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 02:31:41,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-07-21 02:31:41,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:41,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077890917] [2022-07-21 02:31:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 02:31:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077890917] [2022-07-21 02:31:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077890917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277553488] [2022-07-21 02:31:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:42,271 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:42,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 02:31:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:42,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 02:31:42,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:47,418 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-21 02:31:47,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-21 02:31:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:31:49,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:49,952 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-21 02:31:49,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 226 treesize of output 1 [2022-07-21 02:31:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:49,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277553488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:49,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:49,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2022-07-21 02:31:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29404474] [2022-07-21 02:31:49,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:49,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:31:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:31:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:31:49,956 INFO L87 Difference]: Start difference. First operand 240 states and 308 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 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) [2022-07-21 02:31:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:50,432 INFO L93 Difference]: Finished difference Result 348 states and 443 transitions. [2022-07-21 02:31:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 02:31:50,432 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 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 46 [2022-07-21 02:31:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:50,433 INFO L225 Difference]: With dead ends: 348 [2022-07-21 02:31:50,433 INFO L226 Difference]: Without dead ends: 313 [2022-07-21 02:31:50,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 02:31:50,434 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:50,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 143 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-07-21 02:31:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-21 02:31:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 242. [2022-07-21 02:31:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2821576763485478) internal successors, (309), 241 states have internal predecessors, (309), 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) [2022-07-21 02:31:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 309 transitions. [2022-07-21 02:31:50,485 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 309 transitions. Word has length 46 [2022-07-21 02:31:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:50,485 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 309 transitions. [2022-07-21 02:31:50,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 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) [2022-07-21 02:31:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 309 transitions. [2022-07-21 02:31:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:31:50,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:50,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:50,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:50,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:50,699 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2022-07-21 02:31:50,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:50,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528898742] [2022-07-21 02:31:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528898742] [2022-07-21 02:31:51,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528898742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000765690] [2022-07-21 02:31:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:51,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:51,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:51,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 02:31:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:51,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 02:31:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:31:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:31:51,807 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:31:51,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-07-21 02:31:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 02:31:51,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:52,180 INFO L356 Elim1Store]: treesize reduction 41, result has 75.4 percent of original size [2022-07-21 02:31:52,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 151 [2022-07-21 02:31:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000765690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:52,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-07-21 02:31:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653658082] [2022-07-21 02:31:52,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:52,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 02:31:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 02:31:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:31:52,324 INFO L87 Difference]: Start difference. First operand 242 states and 309 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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) [2022-07-21 02:31:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:53,065 INFO L93 Difference]: Finished difference Result 696 states and 904 transitions. [2022-07-21 02:31:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 02:31:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 46 [2022-07-21 02:31:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:53,067 INFO L225 Difference]: With dead ends: 696 [2022-07-21 02:31:53,067 INFO L226 Difference]: Without dead ends: 428 [2022-07-21 02:31:53,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:31:53,068 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:53,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 323 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 440 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-07-21 02:31:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-21 02:31:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 307. [2022-07-21 02:31:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 306 states have internal predecessors, (391), 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) [2022-07-21 02:31:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 391 transitions. [2022-07-21 02:31:53,150 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 391 transitions. Word has length 46 [2022-07-21 02:31:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:53,150 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 391 transitions. [2022-07-21 02:31:53,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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) [2022-07-21 02:31:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 391 transitions. [2022-07-21 02:31:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:31:53,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:53,151 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:53,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 02:31:53,360 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2022-07-21 02:31:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365008586] [2022-07-21 02:31:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365008586] [2022-07-21 02:31:54,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365008586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569180637] [2022-07-21 02:31:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:54,145 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:54,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 02:31:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 02:31:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:31:54,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:31:54,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:31:54,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-07-21 02:31:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:31:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:54,780 INFO L356 Elim1Store]: treesize reduction 50, result has 70.1 percent of original size [2022-07-21 02:31:54,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 141 [2022-07-21 02:31:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:31:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569180637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:54,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:54,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-21 02:31:54,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417674666] [2022-07-21 02:31:54,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 02:31:54,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 02:31:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:31:54,981 INFO L87 Difference]: Start difference. First operand 307 states and 391 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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) [2022-07-21 02:31:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:55,796 INFO L93 Difference]: Finished difference Result 513 states and 653 transitions. [2022-07-21 02:31:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 02:31:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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 46 [2022-07-21 02:31:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:55,798 INFO L225 Difference]: With dead ends: 513 [2022-07-21 02:31:55,798 INFO L226 Difference]: Without dead ends: 410 [2022-07-21 02:31:55,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:31:55,799 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:55,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 244 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 366 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-07-21 02:31:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-21 02:31:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 268. [2022-07-21 02:31:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2546816479400749) internal successors, (335), 267 states have internal predecessors, (335), 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) [2022-07-21 02:31:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 335 transitions. [2022-07-21 02:31:55,872 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 335 transitions. Word has length 46 [2022-07-21 02:31:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:55,872 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 335 transitions. [2022-07-21 02:31:55,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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) [2022-07-21 02:31:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 335 transitions. [2022-07-21 02:31:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 02:31:55,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:55,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:55,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:56,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 02:31:56,073 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2022-07-21 02:31:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:56,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522053379] [2022-07-21 02:31:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 02:31:56,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:56,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522053379] [2022-07-21 02:31:56,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522053379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:56,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999915748] [2022-07-21 02:31:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:56,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:56,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:56,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 02:31:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:31:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:31:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:31:56,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:31:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 02:31:56,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999915748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:31:56,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:31:56,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-07-21 02:31:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134195311] [2022-07-21 02:31:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:31:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:31:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:31:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:31:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:31:56,305 INFO L87 Difference]: Start difference. First operand 268 states and 335 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2022-07-21 02:31:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:31:56,511 INFO L93 Difference]: Finished difference Result 646 states and 806 transitions. [2022-07-21 02:31:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:31:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 55 [2022-07-21 02:31:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:31:56,512 INFO L225 Difference]: With dead ends: 646 [2022-07-21 02:31:56,512 INFO L226 Difference]: Without dead ends: 413 [2022-07-21 02:31:56,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:31:56,513 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 197 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:31:56,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 179 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:31:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-21 02:31:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 292. [2022-07-21 02:31:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2439862542955327) internal successors, (362), 291 states have internal predecessors, (362), 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) [2022-07-21 02:31:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 362 transitions. [2022-07-21 02:31:56,579 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 362 transitions. Word has length 55 [2022-07-21 02:31:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:31:56,579 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 362 transitions. [2022-07-21 02:31:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2022-07-21 02:31:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 362 transitions. [2022-07-21 02:31:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 02:31:56,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:31:56,580 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:31:56,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 02:31:56,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:56,793 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:31:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:31:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2022-07-21 02:31:56,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:31:56,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843361612] [2022-07-21 02:31:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:31:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:31:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:31:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 02:31:57,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:31:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843361612] [2022-07-21 02:31:57,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843361612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:31:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3383377] [2022-07-21 02:31:57,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:31:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:31:57,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:31:57,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:31:57,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 02:31:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:31:57,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:31:57,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 02:31:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:06,485 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-21 02:32:06,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-21 02:32:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 02:32:08,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:32:09,849 INFO L356 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2022-07-21 02:32:09,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 226 treesize of output 1 [2022-07-21 02:32:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:32:09,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3383377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:32:09,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:32:09,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-07-21 02:32:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795445087] [2022-07-21 02:32:09,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:32:09,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 02:32:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:32:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 02:32:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:32:09,853 INFO L87 Difference]: Start difference. First operand 292 states and 362 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:32:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:32:18,886 INFO L93 Difference]: Finished difference Result 681 states and 850 transitions. [2022-07-21 02:32:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 02:32:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 02:32:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:32:18,888 INFO L225 Difference]: With dead ends: 681 [2022-07-21 02:32:18,888 INFO L226 Difference]: Without dead ends: 598 [2022-07-21 02:32:18,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1032, Invalid=6278, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 02:32:18,890 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:32:18,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 264 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 302 Invalid, 0 Unknown, 345 Unchecked, 0.2s Time] [2022-07-21 02:32:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-21 02:32:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 463. [2022-07-21 02:32:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.2662337662337662) internal successors, (585), 462 states have internal predecessors, (585), 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) [2022-07-21 02:32:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 585 transitions. [2022-07-21 02:32:19,013 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 585 transitions. Word has length 56 [2022-07-21 02:32:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:32:19,013 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 585 transitions. [2022-07-21 02:32:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:32:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 585 transitions. [2022-07-21 02:32:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 02:32:19,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:32:19,014 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:32:19,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:19,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:19,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:32:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:32:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2022-07-21 02:32:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:32:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291750970] [2022-07-21 02:32:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:32:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:32:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:32:20,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:32:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291750970] [2022-07-21 02:32:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291750970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:32:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740525189] [2022-07-21 02:32:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:32:20,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:32:20,509 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:32:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 02:32:20,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:32:20,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:32:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 02:32:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:20,748 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 16 treesize of output 8 [2022-07-21 02:32:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 02:32:20,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:32:20,932 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-07-21 02:32:20,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-07-21 02:32:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 02:32:20,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740525189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:32:20,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:32:20,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 33 [2022-07-21 02:32:20,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577281408] [2022-07-21 02:32:20,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:32:20,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 02:32:20,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:32:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 02:32:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 02:32:20,972 INFO L87 Difference]: Start difference. First operand 463 states and 585 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2022-07-21 02:32:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:32:22,783 INFO L93 Difference]: Finished difference Result 1431 states and 1850 transitions. [2022-07-21 02:32:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 02:32:22,784 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 57 [2022-07-21 02:32:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:32:22,787 INFO L225 Difference]: With dead ends: 1431 [2022-07-21 02:32:22,787 INFO L226 Difference]: Without dead ends: 1427 [2022-07-21 02:32:22,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 02:32:22,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 609 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:32:22,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 321 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 02:32:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-07-21 02:32:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 481. [2022-07-21 02:32:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.25625) internal successors, (603), 480 states have internal predecessors, (603), 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) [2022-07-21 02:32:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 603 transitions. [2022-07-21 02:32:22,938 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 603 transitions. Word has length 57 [2022-07-21 02:32:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:32:22,938 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 603 transitions. [2022-07-21 02:32:22,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2022-07-21 02:32:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 603 transitions. [2022-07-21 02:32:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 02:32:22,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:32:22,939 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:32:22,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:23,141 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:32:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:32:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2022-07-21 02:32:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:32:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036387255] [2022-07-21 02:32:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:32:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:32:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 02:32:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:32:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036387255] [2022-07-21 02:32:23,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036387255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:32:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944059812] [2022-07-21 02:32:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:32:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:32:23,209 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:32:23,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 02:32:23,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:32:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:32:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 02:32:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:32:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:32:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 02:32:23,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944059812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:32:23,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:32:23,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2022-07-21 02:32:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745465587] [2022-07-21 02:32:23,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:32:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 02:32:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:32:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 02:32:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:32:23,552 INFO L87 Difference]: Start difference. First operand 481 states and 603 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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) [2022-07-21 02:32:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:32:29,276 INFO L93 Difference]: Finished difference Result 4679 states and 6242 transitions. [2022-07-21 02:32:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 02:32:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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 58 [2022-07-21 02:32:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:32:29,285 INFO L225 Difference]: With dead ends: 4679 [2022-07-21 02:32:29,285 INFO L226 Difference]: Without dead ends: 4235 [2022-07-21 02:32:29,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4137 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2022-07-21 02:32:29,288 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1233 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:32:29,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 703 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 02:32:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2022-07-21 02:32:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 1169. [2022-07-21 02:32:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.268835616438356) internal successors, (1482), 1168 states have internal predecessors, (1482), 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) [2022-07-21 02:32:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1482 transitions. [2022-07-21 02:32:29,706 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1482 transitions. Word has length 58 [2022-07-21 02:32:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:32:29,706 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1482 transitions. [2022-07-21 02:32:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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) [2022-07-21 02:32:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1482 transitions. [2022-07-21 02:32:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 02:32:29,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:32:29,711 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:32:29,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:29,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 02:32:29,920 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:32:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:32:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2022-07-21 02:32:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:32:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494311893] [2022-07-21 02:32:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:32:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:32:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 02:32:30,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:32:30,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494311893] [2022-07-21 02:32:30,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494311893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:32:30,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849755410] [2022-07-21 02:32:30,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:32:30,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:30,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:32:30,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:32:30,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 02:32:31,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 02:32:31,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:32:31,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 02:32:31,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:31,759 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 47 treesize of output 42 [2022-07-21 02:32:31,762 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 11 treesize of output 10 [2022-07-21 02:32:32,494 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-21 02:32:32,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2022-07-21 02:32:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:32:32,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:32:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 02:32:33,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849755410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:32:33,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:32:33,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 15] total 40 [2022-07-21 02:32:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90293601] [2022-07-21 02:32:33,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:32:33,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 02:32:33,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:32:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 02:32:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1355, Unknown=2, NotChecked=0, Total=1560 [2022-07-21 02:32:33,953 INFO L87 Difference]: Start difference. First operand 1169 states and 1482 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:32:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:32:45,115 INFO L93 Difference]: Finished difference Result 4199 states and 5665 transitions. [2022-07-21 02:32:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-21 02:32:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-21 02:32:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:32:45,124 INFO L225 Difference]: With dead ends: 4199 [2022-07-21 02:32:45,125 INFO L226 Difference]: Without dead ends: 4120 [2022-07-21 02:32:45,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 113 SyntacticMatches, 19 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6027 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1715, Invalid=15575, Unknown=2, NotChecked=0, Total=17292 [2022-07-21 02:32:45,128 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 685 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 3480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:32:45,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2262 Invalid, 3480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2796 Invalid, 0 Unknown, 508 Unchecked, 1.5s Time] [2022-07-21 02:32:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2022-07-21 02:32:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 1379. [2022-07-21 02:32:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.2917271407837445) internal successors, (1780), 1378 states have internal predecessors, (1780), 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) [2022-07-21 02:32:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1780 transitions. [2022-07-21 02:32:45,636 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1780 transitions. Word has length 66 [2022-07-21 02:32:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:32:45,636 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1780 transitions. [2022-07-21 02:32:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:32:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1780 transitions. [2022-07-21 02:32:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:32:45,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:32:45,645 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:32:45,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:45,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 02:32:45,846 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:32:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:32:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2022-07-21 02:32:45,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:32:45,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251038686] [2022-07-21 02:32:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:32:45,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:32:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 02:32:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:32:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251038686] [2022-07-21 02:32:46,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251038686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:32:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510296903] [2022-07-21 02:32:46,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:32:46,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:32:46,970 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:32:46,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 02:32:47,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 02:32:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:32:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 02:32:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:47,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-07-21 02:32:47,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 02:32:47,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 02:32:47,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 02:32:47,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 02:32:47,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 02:32:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:32:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:32:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:32:52,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510296903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:32:52,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:32:52,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 43 [2022-07-21 02:32:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406562867] [2022-07-21 02:32:52,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:32:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 02:32:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:32:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 02:32:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 02:32:52,179 INFO L87 Difference]: Start difference. First operand 1379 states and 1780 transitions. Second operand has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 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) [2022-07-21 02:32:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:32:55,702 INFO L93 Difference]: Finished difference Result 3824 states and 5012 transitions. [2022-07-21 02:32:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 02:32:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 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 67 [2022-07-21 02:32:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:32:55,709 INFO L225 Difference]: With dead ends: 3824 [2022-07-21 02:32:55,709 INFO L226 Difference]: Without dead ends: 3171 [2022-07-21 02:32:55,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2022-07-21 02:32:55,711 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:32:55,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 736 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 660 Invalid, 0 Unknown, 752 Unchecked, 0.4s Time] [2022-07-21 02:32:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-07-21 02:32:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2522. [2022-07-21 02:32:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.2963109877032923) internal successors, (3268), 2521 states have internal predecessors, (3268), 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) [2022-07-21 02:32:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3268 transitions. [2022-07-21 02:32:56,719 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3268 transitions. Word has length 67 [2022-07-21 02:32:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:32:56,719 INFO L495 AbstractCegarLoop]: Abstraction has 2522 states and 3268 transitions. [2022-07-21 02:32:56,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 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) [2022-07-21 02:32:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3268 transitions. [2022-07-21 02:32:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:32:56,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:32:56,722 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:32:56,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:56,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:56,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:32:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:32:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1374970291, now seen corresponding path program 7 times [2022-07-21 02:32:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:32:56,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602786940] [2022-07-21 02:32:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:32:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:32:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-21 02:32:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:32:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602786940] [2022-07-21 02:32:57,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602786940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:32:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579581620] [2022-07-21 02:32:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:32:57,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:32:57,304 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:32:57,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 02:32:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:32:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 02:32:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:32:58,731 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-07-21 02:32:58,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-07-21 02:32:59,721 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 02:32:59,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 02:32:59,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:32:59,928 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56_67_78| already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:199) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:421) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:326) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:200) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:129) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$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.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$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.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDistributivityAndPush(QuantifierPusher.java:409) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:354) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$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.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:254) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) 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.transform(TermContextTransformationEngine.java:65) 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.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) 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.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) 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) [2022-07-21 02:32:59,932 INFO L158 Benchmark]: Toolchain (without parser) took 96858.82ms. Allocated memory was 48.2MB in the beginning and 432.0MB in the end (delta: 383.8MB). Free memory was 23.5MB in the beginning and 349.4MB in the end (delta: -326.0MB). Peak memory consumption was 266.8MB. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.32ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 23.3MB in the beginning and 40.7MB in the end (delta: -17.4MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.68ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 38.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: Boogie Preprocessor took 33.79ms. Allocated memory is still 58.7MB. Free memory was 38.9MB in the beginning and 37.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: RCFGBuilder took 362.09ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 36.6MB in the end (delta: 742.8kB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-07-21 02:32:59,933 INFO L158 Benchmark]: TraceAbstraction took 96156.95ms. Allocated memory was 58.7MB in the beginning and 432.0MB in the end (delta: 373.3MB). Free memory was 36.2MB in the beginning and 349.4MB in the end (delta: -313.3MB). Peak memory consumption was 269.8MB. Max. memory is 16.1GB. [2022-07-21 02:32:59,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.32ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 23.3MB in the beginning and 40.7MB in the end (delta: -17.4MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.68ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 38.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.79ms. Allocated memory is still 58.7MB. Free memory was 38.9MB in the beginning and 37.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 362.09ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 36.6MB in the end (delta: 742.8kB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 96156.95ms. Allocated memory was 58.7MB in the beginning and 432.0MB in the end (delta: 373.3MB). Free memory was 36.2MB in the beginning and 349.4MB in the end (delta: -313.3MB). Peak memory consumption was 269.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56_67_78| already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56_67_78| already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:199) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 02:33:00,002 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/loops/vogal-1.i -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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:33:01,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:33:01,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:33:01,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:33:01,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:33:01,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:33:01,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:33:01,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:33:01,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:33:01,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:33:01,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:33:01,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:33:01,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:33:01,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:33:01,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:33:01,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:33:01,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:33:01,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:33:01,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:33:01,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:33:01,605 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:33:01,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:33:01,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:33:01,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:33:01,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:33:01,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:33:01,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:33:01,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:33:01,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:33:01,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:33:01,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:33:01,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:33:01,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:33:01,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:33:01,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:33:01,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:33:01,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:33:01,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:33:01,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:33:01,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:33:01,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:33:01,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:33:01,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 02:33:01,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:33:01,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:33:01,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:33:01,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:33:01,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:33:01,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:33:01,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:33:01,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:33:01,660 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:33:01,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:33:01,661 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:33:01,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:33:01,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:33:01,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:33:01,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:33:01,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:33:01,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:33:01,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:33:01,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:33:01,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:33:01,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:33:01,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:33:01,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:33:01,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:33:01,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:33:01,665 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 02:33:01,665 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 02:33:01,666 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:33:01,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:33:01,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:33:01,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 02:33:01,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-07-21 02:33:01,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:33:01,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:33:01,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:33:01,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:33:01,953 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:33:01,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-1.i [2022-07-21 02:33:01,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9601aa20/4137cef55e9c4eb0b08b5ad086b6ea67/FLAG29ed18844 [2022-07-21 02:33:02,324 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:33:02,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2022-07-21 02:33:02,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9601aa20/4137cef55e9c4eb0b08b5ad086b6ea67/FLAG29ed18844 [2022-07-21 02:33:02,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9601aa20/4137cef55e9c4eb0b08b5ad086b6ea67 [2022-07-21 02:33:02,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:33:02,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:33:02,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:33:02,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:33:02,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:33:02,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2820fc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02, skipping insertion in model container [2022-07-21 02:33:02,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:33:02,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:33:02,496 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/loops/vogal-1.i[895,908] [2022-07-21 02:33:02,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:33:02,553 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:33:02,580 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/loops/vogal-1.i[895,908] [2022-07-21 02:33:02,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:33:02,618 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:33:02,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02 WrapperNode [2022-07-21 02:33:02,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:33:02,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:33:02,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:33:02,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:33:02,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,658 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 132 [2022-07-21 02:33:02,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:33:02,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:33:02,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:33:02,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:33:02,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:33:02,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:33:02,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:33:02,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:33:02,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (1/1) ... [2022-07-21 02:33:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:33:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:33:02,724 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) [2022-07-21 02:33:02,736 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 [2022-07-21 02:33:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:33:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 02:33:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 02:33:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 02:33:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:33:02,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:33:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-21 02:33:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:33:02,811 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:33:02,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:33:03,006 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:33:03,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:33:03,014 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 02:33:03,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:33:03 BoogieIcfgContainer [2022-07-21 02:33:03,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:33:03,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:33:03,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:33:03,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:33:03,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:33:02" (1/3) ... [2022-07-21 02:33:03,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57123ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:33:03, skipping insertion in model container [2022-07-21 02:33:03,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:33:02" (2/3) ... [2022-07-21 02:33:03,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57123ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:33:03, skipping insertion in model container [2022-07-21 02:33:03,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:33:03" (3/3) ... [2022-07-21 02:33:03,023 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-07-21 02:33:03,033 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:33:03,033 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:33:03,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:33:03,083 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@39b82d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d3e3d40 [2022-07-21 02:33:03,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:33:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) [2022-07-21 02:33:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 02:33:03,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:03,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:03,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-07-21 02:33:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:03,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517254645] [2022-07-21 02:33:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:03,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:03,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:03,119 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) [2022-07-21 02:33:03,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 02:33:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 02:33:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:33:03,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:03,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517254645] [2022-07-21 02:33:03,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517254645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:03,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:03,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:33:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222287355] [2022-07-21 02:33:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:03,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:33:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:33:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:33:03,241 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:03,251 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-07-21 02:33:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:33:03,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 02:33:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:03,256 INFO L225 Difference]: With dead ends: 54 [2022-07-21 02:33:03,257 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:33:03,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:33:03,262 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2022-07-21 02:33:03,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:33:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 02:33:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-21 02:33:03,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-07-21 02:33:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:03,282 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-21 02:33:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-21 02:33:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 02:33:03,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:03,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:03,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 02:33:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:03,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-07-21 02:33:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563159270] [2022-07-21 02:33:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:03,488 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) [2022-07-21 02:33:03,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 02:33:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:03,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 02:33:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:33:03,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:03,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:03,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563159270] [2022-07-21 02:33:03,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563159270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:03,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:03,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:33:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133987163] [2022-07-21 02:33:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:33:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:33:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:33:03,576 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-21 02:33:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:03,624 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-21 02:33:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:33:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2022-07-21 02:33:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:03,629 INFO L225 Difference]: With dead ends: 64 [2022-07-21 02:33:03,629 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:33:03,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:33:03,631 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:03,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:33:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-07-21 02:33:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2022-07-21 02:33:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-21 02:33:03,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-07-21 02:33:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:03,646 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-21 02:33:03,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-21 02:33:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-21 02:33:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 02:33:03,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:03,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:03,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:03,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-07-21 02:33:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:03,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811265144] [2022-07-21 02:33:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:03,857 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) [2022-07-21 02:33:03,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 02:33:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:33:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:33:03,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:33:03,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811265144] [2022-07-21 02:33:03,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811265144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:03,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:03,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 02:33:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351886707] [2022-07-21 02:33:03,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 02:33:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 02:33:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:33:03,956 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:04,101 INFO L93 Difference]: Finished difference Result 117 states and 153 transitions. [2022-07-21 02:33:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:33:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 02:33:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:04,103 INFO L225 Difference]: With dead ends: 117 [2022-07-21 02:33:04,103 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 02:33:04,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:33:04,104 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 131 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:04,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 107 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:33:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 02:33:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 32. [2022-07-21 02:33:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2022-07-21 02:33:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-21 02:33:04,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2022-07-21 02:33:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:04,110 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-21 02:33:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-21 02:33:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:33:04,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:04,111 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:04,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:04,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1460348075, now seen corresponding path program 2 times [2022-07-21 02:33:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:04,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378486387] [2022-07-21 02:33:04,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:04,320 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) [2022-07-21 02:33:04,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 02:33:04,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 02:33:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 02:33:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 02:33:04,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:04,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:04,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378486387] [2022-07-21 02:33:04,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378486387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:04,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:04,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 02:33:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603954983] [2022-07-21 02:33:04,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:04,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:33:04,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:33:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:33:04,412 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-21 02:33:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:04,439 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-07-21 02:33:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:33:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 02:33:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:04,440 INFO L225 Difference]: With dead ends: 58 [2022-07-21 02:33:04,441 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 02:33:04,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:33:04,447 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:04,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 02:33:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-07-21 02:33:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 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) [2022-07-21 02:33:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-07-21 02:33:04,452 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 23 [2022-07-21 02:33:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:04,452 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-07-21 02:33:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-21 02:33:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-07-21 02:33:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 02:33:04,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:04,453 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:04,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:04,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -633970766, now seen corresponding path program 1 times [2022-07-21 02:33:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818919419] [2022-07-21 02:33:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:04,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:04,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:04,659 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) [2022-07-21 02:33:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 02:33:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:33:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:33:04,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:33:04,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818919419] [2022-07-21 02:33:04,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818919419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:04,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:04,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-21 02:33:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745423089] [2022-07-21 02:33:04,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:33:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:33:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:33:04,835 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2022-07-21 02:33:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:05,044 INFO L93 Difference]: Finished difference Result 218 states and 291 transitions. [2022-07-21 02:33:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:33:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 29 [2022-07-21 02:33:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:05,046 INFO L225 Difference]: With dead ends: 218 [2022-07-21 02:33:05,046 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 02:33:05,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:33:05,047 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 329 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:05,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 401 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:33:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 02:33:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 46. [2022-07-21 02:33:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 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) [2022-07-21 02:33:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-07-21 02:33:05,054 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-07-21 02:33:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:05,054 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-07-21 02:33:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2022-07-21 02:33:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-07-21 02:33:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 02:33:05,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:05,055 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:05,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:05,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1750893040, now seen corresponding path program 2 times [2022-07-21 02:33:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171757946] [2022-07-21 02:33:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:05,264 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) [2022-07-21 02:33:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 02:33:05,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 02:33:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 02:33:05,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:05,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:05,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171757946] [2022-07-21 02:33:05,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171757946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:05,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:33:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387617370] [2022-07-21 02:33:05,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:33:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:33:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:33:05,338 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:05,351 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2022-07-21 02:33:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:33:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 02:33:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:05,352 INFO L225 Difference]: With dead ends: 95 [2022-07-21 02:33:05,352 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 02:33:05,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:33:05,356 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 55 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 [2022-07-21 02:33:05,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 55 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 02:33:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2022-07-21 02:33:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 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) [2022-07-21 02:33:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-07-21 02:33:05,370 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 31 [2022-07-21 02:33:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:05,370 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-07-21 02:33:05,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-07-21 02:33:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 02:33:05,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:05,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:05,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 02:33:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:05,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1977384251, now seen corresponding path program 1 times [2022-07-21 02:33:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:05,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318745181] [2022-07-21 02:33:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:05,582 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) [2022-07-21 02:33:05,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 02:33:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:33:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:05,698 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 18 treesize of output 10 [2022-07-21 02:33:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 02:33:05,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:05,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318745181] [2022-07-21 02:33:05,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318745181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:05,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:05,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 02:33:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478561367] [2022-07-21 02:33:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:05,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:33:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:33:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:33:05,724 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-21 02:33:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:05,826 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-07-21 02:33:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:33:05,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-21 02:33:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:05,828 INFO L225 Difference]: With dead ends: 69 [2022-07-21 02:33:05,828 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 02:33:05,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:33:05,829 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:05,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-21 02:33:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 02:33:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 02:33:05,834 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) [2022-07-21 02:33:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-07-21 02:33:05,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 32 [2022-07-21 02:33:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:05,840 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-07-21 02:33:05,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-07-21 02:33:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-07-21 02:33:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 02:33:05,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:05,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:05,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:06,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash -791350475, now seen corresponding path program 1 times [2022-07-21 02:33:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121888190] [2022-07-21 02:33:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:06,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:06,058 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) [2022-07-21 02:33:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 02:33:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:33:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:06,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:06,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121888190] [2022-07-21 02:33:06,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121888190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:06,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:06,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 02:33:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495423725] [2022-07-21 02:33:06,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 02:33:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 02:33:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:33:06,148 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2022-07-21 02:33:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:06,186 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-07-21 02:33:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:33:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 33 [2022-07-21 02:33:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:06,188 INFO L225 Difference]: With dead ends: 100 [2022-07-21 02:33:06,188 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 02:33:06,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:33:06,189 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:06,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 02:33:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-21 02:33:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-07-21 02:33:06,201 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 33 [2022-07-21 02:33:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:06,201 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-07-21 02:33:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2022-07-21 02:33:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-07-21 02:33:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:33:06,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:06,203 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:06,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:06,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:06,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash 321125964, now seen corresponding path program 2 times [2022-07-21 02:33:06,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:06,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22550136] [2022-07-21 02:33:06,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:06,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:06,414 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) [2022-07-21 02:33:06,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 02:33:06,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:06,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:33:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:06,536 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 19 treesize of output 11 [2022-07-21 02:33:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:06,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:06,743 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-07-21 02:33:06,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2022-07-21 02:33:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:06,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:06,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22550136] [2022-07-21 02:33:06,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22550136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:06,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:06,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-21 02:33:06,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165520170] [2022-07-21 02:33:06,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:06,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:33:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:06,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:33:06,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:33:06,747 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2022-07-21 02:33:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:07,320 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2022-07-21 02:33:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:33:07,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 36 [2022-07-21 02:33:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:07,321 INFO L225 Difference]: With dead ends: 144 [2022-07-21 02:33:07,321 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 02:33:07,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:33:07,322 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:07,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 116 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-21 02:33:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 02:33:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 66. [2022-07-21 02:33:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 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) [2022-07-21 02:33:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-07-21 02:33:07,328 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 36 [2022-07-21 02:33:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:07,329 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-07-21 02:33:07,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2022-07-21 02:33:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-07-21 02:33:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 02:33:07,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:07,329 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:07,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:07,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:07,537 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1356456828, now seen corresponding path program 1 times [2022-07-21 02:33:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:07,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540891282] [2022-07-21 02:33:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:07,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:07,548 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) [2022-07-21 02:33:07,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 02:33:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:07,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:33:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:33:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:33:07,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540891282] [2022-07-21 02:33:07,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540891282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:07,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:07,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 02:33:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855890676] [2022-07-21 02:33:07,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:33:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:33:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:33:07,663 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:07,777 INFO L93 Difference]: Finished difference Result 275 states and 356 transitions. [2022-07-21 02:33:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:33:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-21 02:33:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:07,779 INFO L225 Difference]: With dead ends: 275 [2022-07-21 02:33:07,779 INFO L226 Difference]: Without dead ends: 250 [2022-07-21 02:33:07,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:33:07,780 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 153 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:07,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 153 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:33:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-21 02:33:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 74. [2022-07-21 02:33:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 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) [2022-07-21 02:33:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-07-21 02:33:07,789 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 37 [2022-07-21 02:33:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:07,790 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-07-21 02:33:07,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-07-21 02:33:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 02:33:07,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:07,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:07,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:07,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1148471371, now seen corresponding path program 2 times [2022-07-21 02:33:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:07,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343524835] [2022-07-21 02:33:07,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:07,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:07,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:08,000 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) [2022-07-21 02:33:08,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 02:33:08,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:33:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:33:08,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:33:08,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343524835] [2022-07-21 02:33:08,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343524835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:08,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:08,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 02:33:08,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117220490] [2022-07-21 02:33:08,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:08,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:33:08,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:33:08,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:33:08,190 INFO L87 Difference]: Start difference. First operand 74 states and 93 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) [2022-07-21 02:33:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:08,621 INFO L93 Difference]: Finished difference Result 726 states and 949 transitions. [2022-07-21 02:33:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 02:33:08,621 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 43 [2022-07-21 02:33:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:08,624 INFO L225 Difference]: With dead ends: 726 [2022-07-21 02:33:08,624 INFO L226 Difference]: Without dead ends: 698 [2022-07-21 02:33:08,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:33:08,626 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 694 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:08,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 575 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:33:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-07-21 02:33:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 103. [2022-07-21 02:33:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.303921568627451) internal successors, (133), 102 states have internal predecessors, (133), 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) [2022-07-21 02:33:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2022-07-21 02:33:08,648 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 43 [2022-07-21 02:33:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:08,648 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2022-07-21 02:33:08,649 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) [2022-07-21 02:33:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2022-07-21 02:33:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:33:08,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:08,649 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:08,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:08,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:08,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 1 times [2022-07-21 02:33:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:08,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199275658] [2022-07-21 02:33:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:08,858 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) [2022-07-21 02:33:08,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 02:33:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:33:08,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:09,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:09,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:09,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199275658] [2022-07-21 02:33:09,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199275658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:09,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:09,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-07-21 02:33:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885558489] [2022-07-21 02:33:09,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:33:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:33:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:33:09,116 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:09,248 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2022-07-21 02:33:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:33:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 02:33:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:09,250 INFO L225 Difference]: With dead ends: 247 [2022-07-21 02:33:09,250 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 02:33:09,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:33:09,251 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 115 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:09,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 826 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:33:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 02:33:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 157. [2022-07-21 02:33:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3269230769230769) internal successors, (207), 156 states have internal predecessors, (207), 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) [2022-07-21 02:33:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2022-07-21 02:33:09,268 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 46 [2022-07-21 02:33:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:09,268 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2022-07-21 02:33:09,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2022-07-21 02:33:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:33:09,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:09,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:09,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:09,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-07-21 02:33:09,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028987327] [2022-07-21 02:33:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:09,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:09,474 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) [2022-07-21 02:33:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 02:33:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:33:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:09,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:09,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-07-21 02:33:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:33:09,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:10,383 INFO L356 Elim1Store]: treesize reduction 11, result has 86.6 percent of original size [2022-07-21 02:33:10,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 86 [2022-07-21 02:33:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:11,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:11,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028987327] [2022-07-21 02:33:11,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028987327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:11,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:11,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-21 02:33:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277008592] [2022-07-21 02:33:11,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 02:33:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 02:33:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:33:11,349 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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) [2022-07-21 02:33:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:11,649 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2022-07-21 02:33:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:33:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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 46 [2022-07-21 02:33:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:11,651 INFO L225 Difference]: With dead ends: 383 [2022-07-21 02:33:11,651 INFO L226 Difference]: Without dead ends: 339 [2022-07-21 02:33:11,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-07-21 02:33:11,652 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 153 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:11,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 247 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 212 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-07-21 02:33:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-21 02:33:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 235. [2022-07-21 02:33:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.3333333333333333) internal successors, (312), 234 states have internal predecessors, (312), 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) [2022-07-21 02:33:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2022-07-21 02:33:11,679 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 46 [2022-07-21 02:33:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:11,680 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2022-07-21 02:33:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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) [2022-07-21 02:33:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2022-07-21 02:33:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:33:11,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:11,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:11,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:11,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:11,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -950265704, now seen corresponding path program 2 times [2022-07-21 02:33:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712443170] [2022-07-21 02:33:11,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:11,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:11,894 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) [2022-07-21 02:33:11,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 02:33:11,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 02:33:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:12,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:12,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2022-07-21 02:33:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:12,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:12,578 INFO L356 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2022-07-21 02:33:12,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 80 [2022-07-21 02:33:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:13,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712443170] [2022-07-21 02:33:13,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712443170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:13,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:13,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-21 02:33:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268980357] [2022-07-21 02:33:13,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:13,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:33:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:33:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:33:13,084 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:13,365 INFO L93 Difference]: Finished difference Result 503 states and 675 transitions. [2022-07-21 02:33:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:33:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 02:33:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:13,368 INFO L225 Difference]: With dead ends: 503 [2022-07-21 02:33:13,368 INFO L226 Difference]: Without dead ends: 453 [2022-07-21 02:33:13,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:33:13,369 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 120 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:13,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 206 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 201 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-07-21 02:33:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-21 02:33:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2022-07-21 02:33:13,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.3282674772036474) internal successors, (437), 329 states have internal predecessors, (437), 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) [2022-07-21 02:33:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 437 transitions. [2022-07-21 02:33:13,401 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 437 transitions. Word has length 46 [2022-07-21 02:33:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:13,401 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 437 transitions. [2022-07-21 02:33:13,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 437 transitions. [2022-07-21 02:33:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:33:13,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:13,402 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:13,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 02:33:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:13,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-07-21 02:33:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288446371] [2022-07-21 02:33:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:33:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:13,609 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) [2022-07-21 02:33:13,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 02:33:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:33:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:13,931 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:13,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-21 02:33:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 02:33:13,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:15,148 INFO L356 Elim1Store]: treesize reduction 11, result has 86.6 percent of original size [2022-07-21 02:33:15,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 86 [2022-07-21 02:33:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:33:15,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288446371] [2022-07-21 02:33:15,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288446371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:15,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:15,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-21 02:33:15,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32252219] [2022-07-21 02:33:15,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:15,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 02:33:15,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 02:33:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=370, Unknown=1, NotChecked=0, Total=462 [2022-07-21 02:33:15,689 INFO L87 Difference]: Start difference. First operand 330 states and 437 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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) [2022-07-21 02:33:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:16,017 INFO L93 Difference]: Finished difference Result 502 states and 670 transitions. [2022-07-21 02:33:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:33:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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 46 [2022-07-21 02:33:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:16,019 INFO L225 Difference]: With dead ends: 502 [2022-07-21 02:33:16,019 INFO L226 Difference]: Without dead ends: 468 [2022-07-21 02:33:16,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=435, Unknown=1, NotChecked=0, Total=552 [2022-07-21 02:33:16,020 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 117 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:16,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 325 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 317 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-07-21 02:33:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-21 02:33:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 353. [2022-07-21 02:33:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3181818181818181) internal successors, (464), 352 states have internal predecessors, (464), 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) [2022-07-21 02:33:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 464 transitions. [2022-07-21 02:33:16,055 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 464 transitions. Word has length 46 [2022-07-21 02:33:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:16,056 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 464 transitions. [2022-07-21 02:33:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 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) [2022-07-21 02:33:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 464 transitions. [2022-07-21 02:33:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 02:33:16,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:16,057 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:16,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:16,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1342444648, now seen corresponding path program 2 times [2022-07-21 02:33:16,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:16,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662893671] [2022-07-21 02:33:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:16,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:16,266 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) [2022-07-21 02:33:16,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 02:33:16,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:16,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:16,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 02:33:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:16,523 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:33:16,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-07-21 02:33:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:17,495 INFO L356 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2022-07-21 02:33:17,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 80 [2022-07-21 02:33:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:17,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662893671] [2022-07-21 02:33:17,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662893671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:17,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:17,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-21 02:33:17,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613983292] [2022-07-21 02:33:17,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:17,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:33:17,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:33:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2022-07-21 02:33:17,969 INFO L87 Difference]: Start difference. First operand 353 states and 464 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:18,209 INFO L93 Difference]: Finished difference Result 497 states and 651 transitions. [2022-07-21 02:33:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:33:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 02:33:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:18,211 INFO L225 Difference]: With dead ends: 497 [2022-07-21 02:33:18,211 INFO L226 Difference]: Without dead ends: 448 [2022-07-21 02:33:18,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=253, Unknown=1, NotChecked=0, Total=342 [2022-07-21 02:33:18,212 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:18,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 230 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-07-21 02:33:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-07-21 02:33:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2022-07-21 02:33:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.2982954545454546) internal successors, (457), 352 states have internal predecessors, (457), 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) [2022-07-21 02:33:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 457 transitions. [2022-07-21 02:33:18,245 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 457 transitions. Word has length 46 [2022-07-21 02:33:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:18,245 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 457 transitions. [2022-07-21 02:33:18,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 457 transitions. [2022-07-21 02:33:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 02:33:18,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:18,246 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:18,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:18,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:18,453 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash 88052664, now seen corresponding path program 2 times [2022-07-21 02:33:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:18,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17645892] [2022-07-21 02:33:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:33:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:18,455 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) [2022-07-21 02:33:18,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 02:33:18,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:33:18,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:33:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:33:18,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:33:18,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17645892] [2022-07-21 02:33:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17645892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:18,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 02:33:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469980201] [2022-07-21 02:33:18,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:33:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:33:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:33:18,568 INFO L87 Difference]: Start difference. First operand 353 states and 457 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2022-07-21 02:33:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:18,646 INFO L93 Difference]: Finished difference Result 604 states and 774 transitions. [2022-07-21 02:33:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:33:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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 49 [2022-07-21 02:33:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:18,648 INFO L225 Difference]: With dead ends: 604 [2022-07-21 02:33:18,648 INFO L226 Difference]: Without dead ends: 311 [2022-07-21 02:33:18,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:33:18,650 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 122 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:33:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-21 02:33:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-07-21 02:33:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.2110389610389611) internal successors, (373), 308 states have internal predecessors, (373), 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) [2022-07-21 02:33:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 373 transitions. [2022-07-21 02:33:18,688 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 373 transitions. Word has length 49 [2022-07-21 02:33:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:18,688 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 373 transitions. [2022-07-21 02:33:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2022-07-21 02:33:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 373 transitions. [2022-07-21 02:33:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 02:33:18,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:18,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:18,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:18,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1190702396, now seen corresponding path program 3 times [2022-07-21 02:33:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:18,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443211902] [2022-07-21 02:33:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:33:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:18,904 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) [2022-07-21 02:33:18,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 02:33:19,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 02:33:19,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:19,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 02:33:19,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:19,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:33:19,730 INFO L356 Elim1Store]: treesize reduction 38, result has 29.6 percent of original size [2022-07-21 02:33:19,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2022-07-21 02:33:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:19,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:21,106 INFO L356 Elim1Store]: treesize reduction 83, result has 40.3 percent of original size [2022-07-21 02:33:21,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 83 [2022-07-21 02:33:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 02:33:21,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443211902] [2022-07-21 02:33:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443211902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:21,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:21,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2022-07-21 02:33:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162317168] [2022-07-21 02:33:21,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:21,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:33:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:33:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:33:21,228 INFO L87 Difference]: Start difference. First operand 309 states and 373 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2022-07-21 02:33:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:21,893 INFO L93 Difference]: Finished difference Result 637 states and 761 transitions. [2022-07-21 02:33:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:33:21,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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 55 [2022-07-21 02:33:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:21,895 INFO L225 Difference]: With dead ends: 637 [2022-07-21 02:33:21,895 INFO L226 Difference]: Without dead ends: 404 [2022-07-21 02:33:21,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 02:33:21,896 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:21,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 464 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 346 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2022-07-21 02:33:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-21 02:33:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 368. [2022-07-21 02:33:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.1880108991825613) internal successors, (436), 367 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 436 transitions. [2022-07-21 02:33:21,938 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 436 transitions. Word has length 55 [2022-07-21 02:33:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:21,938 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 436 transitions. [2022-07-21 02:33:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2022-07-21 02:33:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 436 transitions. [2022-07-21 02:33:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 02:33:21,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:21,939 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:21,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:22,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:22,147 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1191953367, now seen corresponding path program 3 times [2022-07-21 02:33:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:22,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489443537] [2022-07-21 02:33:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:33:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:22,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 02:33:22,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:33:22,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:33:22,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:33:22,329 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:22,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 13 [2022-07-21 02:33:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-21 02:33:22,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:33:22,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:22,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489443537] [2022-07-21 02:33:22,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489443537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:33:22,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:33:22,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 02:33:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020647691] [2022-07-21 02:33:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:33:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:33:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:33:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:33:22,343 INFO L87 Difference]: Start difference. First operand 368 states and 436 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:22,463 INFO L93 Difference]: Finished difference Result 424 states and 496 transitions. [2022-07-21 02:33:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:33:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 02:33:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:22,465 INFO L225 Difference]: With dead ends: 424 [2022-07-21 02:33:22,465 INFO L226 Difference]: Without dead ends: 397 [2022-07-21 02:33:22,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:33:22,466 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:22,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 95 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-21 02:33:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-21 02:33:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 355. [2022-07-21 02:33:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.1779661016949152) internal successors, (417), 354 states have internal predecessors, (417), 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) [2022-07-21 02:33:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 417 transitions. [2022-07-21 02:33:22,507 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 417 transitions. Word has length 55 [2022-07-21 02:33:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:22,507 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 417 transitions. [2022-07-21 02:33:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 417 transitions. [2022-07-21 02:33:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 02:33:22,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:22,508 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:22,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:22,715 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 263905770, now seen corresponding path program 3 times [2022-07-21 02:33:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891568645] [2022-07-21 02:33:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:33:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:22,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:22,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 02:33:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:33:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:22,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:33:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:22,894 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 10 [2022-07-21 02:33:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 02:33:22,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:23,040 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 02:33:23,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-07-21 02:33:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 02:33:23,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:23,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891568645] [2022-07-21 02:33:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891568645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:23,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-07-21 02:33:23,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824290644] [2022-07-21 02:33:23,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:33:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:33:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:33:23,047 INFO L87 Difference]: Start difference. First operand 355 states and 417 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:25,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:33:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:25,286 INFO L93 Difference]: Finished difference Result 385 states and 451 transitions. [2022-07-21 02:33:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:33:25,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 02:33:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:25,287 INFO L225 Difference]: With dead ends: 385 [2022-07-21 02:33:25,287 INFO L226 Difference]: Without dead ends: 296 [2022-07-21 02:33:25,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:33:25,288 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:25,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 171 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-21 02:33:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-21 02:33:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-07-21 02:33:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 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) [2022-07-21 02:33:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 353 transitions. [2022-07-21 02:33:25,323 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 353 transitions. Word has length 56 [2022-07-21 02:33:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:25,323 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 353 transitions. [2022-07-21 02:33:25,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 353 transitions. [2022-07-21 02:33:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 02:33:25,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:25,324 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:25,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:25,534 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1166876799, now seen corresponding path program 4 times [2022-07-21 02:33:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:25,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412163035] [2022-07-21 02:33:25,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:33:25,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:25,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:25,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:25,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 02:33:25,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:33:25,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:33:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:25,758 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 23 treesize of output 11 [2022-07-21 02:33:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 02:33:25,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:26,037 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 02:33:26,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-07-21 02:33:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 02:33:26,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412163035] [2022-07-21 02:33:26,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412163035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:26,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:26,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-07-21 02:33:26,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982899928] [2022-07-21 02:33:26,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:26,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:33:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:33:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:33:26,046 INFO L87 Difference]: Start difference. First operand 296 states and 353 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-07-21 02:33:28,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:33:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:28,404 INFO L93 Difference]: Finished difference Result 364 states and 431 transitions. [2022-07-21 02:33:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:33:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 57 [2022-07-21 02:33:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:28,405 INFO L225 Difference]: With dead ends: 364 [2022-07-21 02:33:28,405 INFO L226 Difference]: Without dead ends: 360 [2022-07-21 02:33:28,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:33:28,406 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:28,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 172 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 134 Invalid, 1 Unknown, 23 Unchecked, 2.1s Time] [2022-07-21 02:33:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-21 02:33:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 311. [2022-07-21 02:33:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1870967741935483) internal successors, (368), 310 states have internal predecessors, (368), 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) [2022-07-21 02:33:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2022-07-21 02:33:28,445 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 57 [2022-07-21 02:33:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:28,446 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2022-07-21 02:33:28,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2022-07-21 02:33:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2022-07-21 02:33:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 02:33:28,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:28,447 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:28,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:28,655 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -486663613, now seen corresponding path program 5 times [2022-07-21 02:33:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:28,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523107612] [2022-07-21 02:33:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:33:28,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:28,657 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:28,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 02:33:28,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 02:33:28,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:33:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 02:33:28,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 02:33:28,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523107612] [2022-07-21 02:33:28,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523107612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:28,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2022-07-21 02:33:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247250558] [2022-07-21 02:33:28,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:33:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:33:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:33:28,926 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:29,631 INFO L93 Difference]: Finished difference Result 1525 states and 1818 transitions. [2022-07-21 02:33:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 02:33:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 02:33:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:29,636 INFO L225 Difference]: With dead ends: 1525 [2022-07-21 02:33:29,636 INFO L226 Difference]: Without dead ends: 1385 [2022-07-21 02:33:29,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:33:29,637 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 364 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:29,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 299 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:33:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-07-21 02:33:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 539. [2022-07-21 02:33:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.2267657992565055) internal successors, (660), 538 states have internal predecessors, (660), 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) [2022-07-21 02:33:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 660 transitions. [2022-07-21 02:33:29,721 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 660 transitions. Word has length 58 [2022-07-21 02:33:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:29,721 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 660 transitions. [2022-07-21 02:33:29,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:33:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 660 transitions. [2022-07-21 02:33:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 02:33:29,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:29,722 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:29,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:29,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:29,933 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 475375663, now seen corresponding path program 6 times [2022-07-21 02:33:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:29,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413140064] [2022-07-21 02:33:29,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:33:29,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:29,934 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:29,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 02:33:30,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 02:33:30,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:33:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:30,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:33:30,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:30,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 13 [2022-07-21 02:33:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-21 02:33:30,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:30,647 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 02:33:30,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2022-07-21 02:33:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-21 02:33:30,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413140064] [2022-07-21 02:33:30,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413140064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:30,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:30,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-07-21 02:33:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315586577] [2022-07-21 02:33:30,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 02:33:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 02:33:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:33:30,651 INFO L87 Difference]: Start difference. First operand 539 states and 660 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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) [2022-07-21 02:33:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:31,062 INFO L93 Difference]: Finished difference Result 756 states and 909 transitions. [2022-07-21 02:33:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:33:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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 66 [2022-07-21 02:33:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:31,064 INFO L225 Difference]: With dead ends: 756 [2022-07-21 02:33:31,064 INFO L226 Difference]: Without dead ends: 701 [2022-07-21 02:33:31,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:33:31,065 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:31,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 161 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 108 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-21 02:33:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-07-21 02:33:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 523. [2022-07-21 02:33:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.2222222222222223) internal successors, (638), 522 states have internal predecessors, (638), 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) [2022-07-21 02:33:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 638 transitions. [2022-07-21 02:33:31,136 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 638 transitions. Word has length 66 [2022-07-21 02:33:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:31,136 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 638 transitions. [2022-07-21 02:33:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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) [2022-07-21 02:33:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 638 transitions. [2022-07-21 02:33:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:33:31,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:31,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:31,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:31,345 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -365203249, now seen corresponding path program 7 times [2022-07-21 02:33:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586349651] [2022-07-21 02:33:31,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:33:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:31,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:31,346 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:31,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 02:33:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:33:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:33:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:33:31,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 02:33:31,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:31,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586349651] [2022-07-21 02:33:31,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586349651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:31,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:31,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-07-21 02:33:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94625537] [2022-07-21 02:33:31,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 02:33:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:31,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 02:33:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:33:31,734 INFO L87 Difference]: Start difference. First operand 523 states and 638 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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) [2022-07-21 02:33:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:32,199 INFO L93 Difference]: Finished difference Result 1083 states and 1295 transitions. [2022-07-21 02:33:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 02:33:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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 67 [2022-07-21 02:33:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:32,201 INFO L225 Difference]: With dead ends: 1083 [2022-07-21 02:33:32,201 INFO L226 Difference]: Without dead ends: 1077 [2022-07-21 02:33:32,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:33:32,202 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 296 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:32,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2297 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:33:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-07-21 02:33:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 821. [2022-07-21 02:33:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.226829268292683) internal successors, (1006), 820 states have internal predecessors, (1006), 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) [2022-07-21 02:33:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1006 transitions. [2022-07-21 02:33:32,329 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1006 transitions. Word has length 67 [2022-07-21 02:33:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:32,329 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1006 transitions. [2022-07-21 02:33:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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) [2022-07-21 02:33:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1006 transitions. [2022-07-21 02:33:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:33:32,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:32,331 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:32,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-21 02:33:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:32,539 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash 314855121, now seen corresponding path program 4 times [2022-07-21 02:33:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:32,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120434898] [2022-07-21 02:33:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:33:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:32,541 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:32,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 02:33:32,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:33:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 02:33:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:33,501 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:33:33,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 46 [2022-07-21 02:33:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 02:33:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:35,012 INFO L356 Elim1Store]: treesize reduction 73, result has 74.7 percent of original size [2022-07-21 02:33:35,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 247 [2022-07-21 02:33:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 02:33:42,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120434898] [2022-07-21 02:33:42,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120434898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:42,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2022-07-21 02:33:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588395543] [2022-07-21 02:33:42,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:42,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 02:33:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 02:33:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:33:42,174 INFO L87 Difference]: Start difference. First operand 821 states and 1006 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:33:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:45,221 INFO L93 Difference]: Finished difference Result 1766 states and 2151 transitions. [2022-07-21 02:33:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 02:33:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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 67 [2022-07-21 02:33:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:45,226 INFO L225 Difference]: With dead ends: 1766 [2022-07-21 02:33:45,226 INFO L226 Difference]: Without dead ends: 1582 [2022-07-21 02:33:45,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=988, Invalid=3704, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 02:33:45,227 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 387 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:45,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 392 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 862 Invalid, 0 Unknown, 4 Unchecked, 0.9s Time] [2022-07-21 02:33:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-07-21 02:33:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1298. [2022-07-21 02:33:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 1.2289899768696992) internal successors, (1594), 1297 states have internal predecessors, (1594), 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) [2022-07-21 02:33:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1594 transitions. [2022-07-21 02:33:45,431 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1594 transitions. Word has length 67 [2022-07-21 02:33:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:45,431 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1594 transitions. [2022-07-21 02:33:45,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:33:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1594 transitions. [2022-07-21 02:33:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:33:45,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:45,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:45,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:45,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1685780749, now seen corresponding path program 3 times [2022-07-21 02:33:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:45,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21992388] [2022-07-21 02:33:45,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:33:45,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:45,643 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:45,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 02:33:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 02:33:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 02:33:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:33:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:33:46,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:33:46,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:33:46,793 INFO L356 Elim1Store]: treesize reduction 66, result has 44.5 percent of original size [2022-07-21 02:33:46,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 83 [2022-07-21 02:33:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 02:33:46,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:33:56,860 INFO L356 Elim1Store]: treesize reduction 199, result has 0.5 percent of original size [2022-07-21 02:33:56,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 1 [2022-07-21 02:33:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 02:33:56,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:33:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21992388] [2022-07-21 02:33:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21992388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:33:56,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:33:56,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-07-21 02:33:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221605371] [2022-07-21 02:33:56,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:33:56,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 02:33:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:33:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 02:33:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=658, Unknown=5, NotChecked=0, Total=812 [2022-07-21 02:33:56,864 INFO L87 Difference]: Start difference. First operand 1298 states and 1594 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 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) [2022-07-21 02:33:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:33:59,087 INFO L93 Difference]: Finished difference Result 2407 states and 2899 transitions. [2022-07-21 02:33:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 02:33:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 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 67 [2022-07-21 02:33:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:33:59,094 INFO L225 Difference]: With dead ends: 2407 [2022-07-21 02:33:59,094 INFO L226 Difference]: Without dead ends: 2288 [2022-07-21 02:33:59,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=360, Invalid=1615, Unknown=5, NotChecked=0, Total=1980 [2022-07-21 02:33:59,095 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:33:59,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 173 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2022-07-21 02:33:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2022-07-21 02:33:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 1376. [2022-07-21 02:33:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.2232727272727273) internal successors, (1682), 1375 states have internal predecessors, (1682), 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) [2022-07-21 02:33:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1682 transitions. [2022-07-21 02:33:59,334 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1682 transitions. Word has length 67 [2022-07-21 02:33:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:33:59,335 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1682 transitions. [2022-07-21 02:33:59,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 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) [2022-07-21 02:33:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1682 transitions. [2022-07-21 02:33:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:33:59,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:33:59,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:33:59,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 02:33:59,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:33:59,547 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:33:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:33:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1907586673, now seen corresponding path program 4 times [2022-07-21 02:33:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:33:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071889088] [2022-07-21 02:33:59,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:33:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:33:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:33:59,549 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:33:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 02:33:59,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:33:59,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:33:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 02:33:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:34:00,014 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:34:00,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-21 02:34:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:34:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:34:01,375 INFO L356 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-07-21 02:34:01,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2022-07-21 02:34:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:34:01,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:34:01,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071889088] [2022-07-21 02:34:01,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071889088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:34:01,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:34:01,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-07-21 02:34:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636272366] [2022-07-21 02:34:01,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:34:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 02:34:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:34:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 02:34:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2022-07-21 02:34:01,411 INFO L87 Difference]: Start difference. First operand 1376 states and 1682 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 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) [2022-07-21 02:34:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:34:01,995 INFO L93 Difference]: Finished difference Result 2086 states and 2539 transitions. [2022-07-21 02:34:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 02:34:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 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 67 [2022-07-21 02:34:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:34:01,999 INFO L225 Difference]: With dead ends: 2086 [2022-07-21 02:34:02,000 INFO L226 Difference]: Without dead ends: 1879 [2022-07-21 02:34:02,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=130, Invalid=571, Unknown=1, NotChecked=0, Total=702 [2022-07-21 02:34:02,000 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:34:02,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 295 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 225 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-07-21 02:34:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-07-21 02:34:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1819. [2022-07-21 02:34:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 1.2194719471947195) internal successors, (2217), 1818 states have internal predecessors, (2217), 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) [2022-07-21 02:34:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2217 transitions. [2022-07-21 02:34:02,342 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2217 transitions. Word has length 67 [2022-07-21 02:34:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:34:02,342 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2217 transitions. [2022-07-21 02:34:02,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 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) [2022-07-21 02:34:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2217 transitions. [2022-07-21 02:34:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:34:02,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:34:02,345 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:34:02,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 02:34:02,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:34:02,553 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:34:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:34:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1649421235, now seen corresponding path program 1 times [2022-07-21 02:34:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:34:02,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605446087] [2022-07-21 02:34:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:34:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:34:02,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:34:02,554 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:34:02,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 02:34:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:34:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 02:34:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:34:03,487 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-21 02:34:03,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 35 [2022-07-21 02:34:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 02:34:04,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:34:06,892 INFO L356 Elim1Store]: treesize reduction 73, result has 74.7 percent of original size [2022-07-21 02:34:06,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 80 treesize of output 247 [2022-07-21 02:34:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 02:34:14,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:34:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605446087] [2022-07-21 02:34:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605446087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:34:14,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:34:14,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2022-07-21 02:34:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111947469] [2022-07-21 02:34:14,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:34:14,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 02:34:14,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:34:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 02:34:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1051, Unknown=1, NotChecked=0, Total=1260 [2022-07-21 02:34:14,999 INFO L87 Difference]: Start difference. First operand 1819 states and 2217 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:34:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:34:18,591 INFO L93 Difference]: Finished difference Result 1917 states and 2326 transitions. [2022-07-21 02:34:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 02:34:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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 67 [2022-07-21 02:34:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:34:18,596 INFO L225 Difference]: With dead ends: 1917 [2022-07-21 02:34:18,596 INFO L226 Difference]: Without dead ends: 1883 [2022-07-21 02:34:18,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=395, Invalid=1955, Unknown=2, NotChecked=0, Total=2352 [2022-07-21 02:34:18,597 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 182 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:34:18,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 284 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 759 Invalid, 0 Unknown, 18 Unchecked, 0.7s Time] [2022-07-21 02:34:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-07-21 02:34:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1871. [2022-07-21 02:34:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 1.2133689839572193) internal successors, (2269), 1870 states have internal predecessors, (2269), 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) [2022-07-21 02:34:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2269 transitions. [2022-07-21 02:34:18,969 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2269 transitions. Word has length 67 [2022-07-21 02:34:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:34:18,969 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 2269 transitions. [2022-07-21 02:34:18,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:34:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2269 transitions. [2022-07-21 02:34:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:34:18,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:34:18,973 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:34:18,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 02:34:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:34:19,181 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:34:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:34:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1549071377, now seen corresponding path program 2 times [2022-07-21 02:34:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:34:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559123423] [2022-07-21 02:34:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:34:19,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:34:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:34:19,183 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:34:19,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 02:34:19,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:34:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:34:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 02:34:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:34:19,756 INFO L356 Elim1Store]: treesize reduction 6, result has 89.5 percent of original size [2022-07-21 02:34:19,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2022-07-21 02:34:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 02:34:19,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:34:29,876 INFO L356 Elim1Store]: treesize reduction 56, result has 72.0 percent of original size [2022-07-21 02:34:29,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 175 [2022-07-21 02:34:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-21 02:34:37,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:34:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559123423] [2022-07-21 02:34:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559123423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:34:37,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:34:37,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-07-21 02:34:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683667374] [2022-07-21 02:34:37,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:34:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 02:34:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:34:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 02:34:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=520, Unknown=5, NotChecked=0, Total=650 [2022-07-21 02:34:37,762 INFO L87 Difference]: Start difference. First operand 1871 states and 2269 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:34:44,580 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:34:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:34:56,111 INFO L93 Difference]: Finished difference Result 4042 states and 4966 transitions. [2022-07-21 02:34:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 02:34:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 02:34:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:34:56,119 INFO L225 Difference]: With dead ends: 4042 [2022-07-21 02:34:56,119 INFO L226 Difference]: Without dead ends: 3095 [2022-07-21 02:34:56,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=268, Invalid=1283, Unknown=9, NotChecked=0, Total=1560 [2022-07-21 02:34:56,121 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:34:56,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 188 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 122 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-07-21 02:34:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2022-07-21 02:34:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2848. [2022-07-21 02:34:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 1.216719353705655) internal successors, (3464), 2847 states have internal predecessors, (3464), 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) [2022-07-21 02:34:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 3464 transitions. [2022-07-21 02:34:56,709 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 3464 transitions. Word has length 67 [2022-07-21 02:34:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:34:56,709 INFO L495 AbstractCegarLoop]: Abstraction has 2848 states and 3464 transitions. [2022-07-21 02:34:56,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:34:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 3464 transitions. [2022-07-21 02:34:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:34:56,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:34:56,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:34:56,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 02:34:56,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:34:56,922 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:34:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:34:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1570612881, now seen corresponding path program 3 times [2022-07-21 02:34:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:34:56,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463209134] [2022-07-21 02:34:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:34:56,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:34:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:34:56,924 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:34:56,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 02:34:57,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 02:34:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:34:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 02:34:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:34:57,765 INFO L356 Elim1Store]: treesize reduction 15, result has 63.4 percent of original size [2022-07-21 02:34:57,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 56 [2022-07-21 02:34:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:34:57,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:00,480 INFO L356 Elim1Store]: treesize reduction 37, result has 80.3 percent of original size [2022-07-21 02:35:00,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 182 [2022-07-21 02:35:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:35:04,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463209134] [2022-07-21 02:35:04,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463209134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:04,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:04,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2022-07-21 02:35:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163081410] [2022-07-21 02:35:04,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 02:35:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 02:35:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1027, Unknown=1, NotChecked=0, Total=1260 [2022-07-21 02:35:04,718 INFO L87 Difference]: Start difference. First operand 2848 states and 3464 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:35:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:07,552 INFO L93 Difference]: Finished difference Result 3093 states and 3743 transitions. [2022-07-21 02:35:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 02:35:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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 67 [2022-07-21 02:35:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:07,559 INFO L225 Difference]: With dead ends: 3093 [2022-07-21 02:35:07,559 INFO L226 Difference]: Without dead ends: 3059 [2022-07-21 02:35:07,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=542, Invalid=2319, Unknown=1, NotChecked=0, Total=2862 [2022-07-21 02:35:07,561 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:07,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 338 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 359 Invalid, 0 Unknown, 418 Unchecked, 0.3s Time] [2022-07-21 02:35:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2022-07-21 02:35:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2992. [2022-07-21 02:35:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 1.2109662320294217) internal successors, (3622), 2991 states have internal predecessors, (3622), 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) [2022-07-21 02:35:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 3622 transitions. [2022-07-21 02:35:08,243 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 3622 transitions. Word has length 67 [2022-07-21 02:35:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:08,243 INFO L495 AbstractCegarLoop]: Abstraction has 2992 states and 3622 transitions. [2022-07-21 02:35:08,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 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) [2022-07-21 02:35:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 3622 transitions. [2022-07-21 02:35:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:35:08,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:08,246 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:08,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-21 02:35:08,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:08,454 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 4 times [2022-07-21 02:35:08,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:08,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132456560] [2022-07-21 02:35:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:35:08,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:08,456 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 02:35:08,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:35:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 02:35:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:08,926 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:35:08,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-07-21 02:35:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 02:35:08,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:09,533 INFO L356 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-07-21 02:35:09,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2022-07-21 02:35:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 02:35:09,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132456560] [2022-07-21 02:35:09,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132456560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:09,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:09,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-07-21 02:35:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570900246] [2022-07-21 02:35:09,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 02:35:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 02:35:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:35:09,563 INFO L87 Difference]: Start difference. First operand 2992 states and 3622 transitions. Second operand has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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) [2022-07-21 02:35:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:10,628 INFO L93 Difference]: Finished difference Result 3386 states and 4096 transitions. [2022-07-21 02:35:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 02:35:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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 67 [2022-07-21 02:35:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:10,636 INFO L225 Difference]: With dead ends: 3386 [2022-07-21 02:35:10,636 INFO L226 Difference]: Without dead ends: 3251 [2022-07-21 02:35:10,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:35:10,637 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 157 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:10,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 275 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 322 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-07-21 02:35:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2022-07-21 02:35:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2997. [2022-07-21 02:35:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 1.2096128170894527) internal successors, (3624), 2996 states have internal predecessors, (3624), 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) [2022-07-21 02:35:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3624 transitions. [2022-07-21 02:35:11,306 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3624 transitions. Word has length 67 [2022-07-21 02:35:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:11,307 INFO L495 AbstractCegarLoop]: Abstraction has 2997 states and 3624 transitions. [2022-07-21 02:35:11,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 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) [2022-07-21 02:35:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3624 transitions. [2022-07-21 02:35:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:35:11,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:11,310 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:11,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-21 02:35:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:11,514 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 5 times [2022-07-21 02:35:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:11,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716103153] [2022-07-21 02:35:11,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:35:11,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:11,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:11,516 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:11,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 02:35:11,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 02:35:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 02:35:11,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:12,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:35:12,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:35:12,568 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-21 02:35:12,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 30 [2022-07-21 02:35:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 02:35:12,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:13,951 INFO L356 Elim1Store]: treesize reduction 20, result has 78.0 percent of original size [2022-07-21 02:35:13,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 86 [2022-07-21 02:35:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 02:35:17,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716103153] [2022-07-21 02:35:17,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716103153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:17,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:17,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2022-07-21 02:35:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384079941] [2022-07-21 02:35:17,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:17,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 02:35:17,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 02:35:17,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1421, Unknown=1, NotChecked=0, Total=1640 [2022-07-21 02:35:17,519 INFO L87 Difference]: Start difference. First operand 2997 states and 3624 transitions. Second operand has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 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) [2022-07-21 02:35:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:24,045 INFO L93 Difference]: Finished difference Result 3957 states and 4666 transitions. [2022-07-21 02:35:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 02:35:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 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 67 [2022-07-21 02:35:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:24,056 INFO L225 Difference]: With dead ends: 3957 [2022-07-21 02:35:24,056 INFO L226 Difference]: Without dead ends: 3741 [2022-07-21 02:35:24,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=512, Invalid=3146, Unknown=2, NotChecked=0, Total=3660 [2022-07-21 02:35:24,058 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:24,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 464 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 154 Invalid, 0 Unknown, 519 Unchecked, 0.2s Time] [2022-07-21 02:35:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-07-21 02:35:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3244. [2022-07-21 02:35:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 1.2007400555041627) internal successors, (3894), 3243 states have internal predecessors, (3894), 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) [2022-07-21 02:35:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 3894 transitions. [2022-07-21 02:35:24,768 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 3894 transitions. Word has length 67 [2022-07-21 02:35:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:24,768 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 3894 transitions. [2022-07-21 02:35:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 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) [2022-07-21 02:35:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 3894 transitions. [2022-07-21 02:35:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:35:24,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:24,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:24,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-21 02:35:24,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:24,972 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 6 times [2022-07-21 02:35:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379927552] [2022-07-21 02:35:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:35:24,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:24,974 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 02:35:25,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 02:35:25,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 02:35:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:25,606 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 02:35:25,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-07-21 02:35:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 02:35:25,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:27,910 INFO L356 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2022-07-21 02:35:27,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2022-07-21 02:35:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 02:35:27,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379927552] [2022-07-21 02:35:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379927552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:27,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:27,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2022-07-21 02:35:27,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472751275] [2022-07-21 02:35:27,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:27,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:35:27,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:35:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=773, Unknown=1, NotChecked=0, Total=930 [2022-07-21 02:35:27,957 INFO L87 Difference]: Start difference. First operand 3244 states and 3894 transitions. Second operand has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 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) [2022-07-21 02:35:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:29,889 INFO L93 Difference]: Finished difference Result 4980 states and 5955 transitions. [2022-07-21 02:35:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 02:35:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 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 67 [2022-07-21 02:35:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:29,903 INFO L225 Difference]: With dead ends: 4980 [2022-07-21 02:35:29,903 INFO L226 Difference]: Without dead ends: 4700 [2022-07-21 02:35:29,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=275, Invalid=1206, Unknown=1, NotChecked=0, Total=1482 [2022-07-21 02:35:29,905 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:29,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 404 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 527 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-07-21 02:35:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2022-07-21 02:35:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 4580. [2022-07-21 02:35:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 1.2035378903690763) internal successors, (5511), 4579 states have internal predecessors, (5511), 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) [2022-07-21 02:35:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 5511 transitions. [2022-07-21 02:35:30,914 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 5511 transitions. Word has length 67 [2022-07-21 02:35:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:30,914 INFO L495 AbstractCegarLoop]: Abstraction has 4580 states and 5511 transitions. [2022-07-21 02:35:30,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 states have internal predecessors, (99), 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) [2022-07-21 02:35:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 5511 transitions. [2022-07-21 02:35:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 02:35:30,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:30,920 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:30,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-21 02:35:31,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:31,128 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:31,128 INFO L85 PathProgramCache]: Analyzing trace with hash -420398947, now seen corresponding path program 8 times [2022-07-21 02:35:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:31,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109936248] [2022-07-21 02:35:31,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:35:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:31,130 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:31,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 02:35:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:35:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:35:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:31,490 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 10 [2022-07-21 02:35:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 02:35:31,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:31,748 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 02:35:31,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-07-21 02:35:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-21 02:35:31,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:31,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109936248] [2022-07-21 02:35:31,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109936248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:31,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:31,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2022-07-21 02:35:31,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926616015] [2022-07-21 02:35:31,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:31,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:35:31,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:35:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:35:31,760 INFO L87 Difference]: Start difference. First operand 4580 states and 5511 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:33,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 02:35:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:34,682 INFO L93 Difference]: Finished difference Result 5651 states and 6620 transitions. [2022-07-21 02:35:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:35:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-21 02:35:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:34,692 INFO L225 Difference]: With dead ends: 5651 [2022-07-21 02:35:34,692 INFO L226 Difference]: Without dead ends: 2113 [2022-07-21 02:35:34,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:35:34,696 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:34,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 271 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 244 Invalid, 1 Unknown, 26 Unchecked, 2.2s Time] [2022-07-21 02:35:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-07-21 02:35:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2113. [2022-07-21 02:35:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 1.175662878787879) internal successors, (2483), 2112 states have internal predecessors, (2483), 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) [2022-07-21 02:35:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 2483 transitions. [2022-07-21 02:35:35,205 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 2483 transitions. Word has length 77 [2022-07-21 02:35:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:35,206 INFO L495 AbstractCegarLoop]: Abstraction has 2113 states and 2483 transitions. [2022-07-21 02:35:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 2483 transitions. [2022-07-21 02:35:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 02:35:35,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:35,208 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:35,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-21 02:35:35,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:35,409 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1190325602, now seen corresponding path program 9 times [2022-07-21 02:35:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264684659] [2022-07-21 02:35:35,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:35:35,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:35,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:35,411 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:35,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 02:35:35,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 02:35:35,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:35:35,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:35,841 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 19 treesize of output 11 [2022-07-21 02:35:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-21 02:35:35,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:36,226 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 02:35:36,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-07-21 02:35:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-21 02:35:36,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:36,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264684659] [2022-07-21 02:35:36,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264684659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:36,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:36,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-07-21 02:35:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408789681] [2022-07-21 02:35:36,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 02:35:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 02:35:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:35:36,280 INFO L87 Difference]: Start difference. First operand 2113 states and 2483 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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) [2022-07-21 02:35:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:37,324 INFO L93 Difference]: Finished difference Result 2595 states and 3045 transitions. [2022-07-21 02:35:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:35:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 78 [2022-07-21 02:35:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:37,328 INFO L225 Difference]: With dead ends: 2595 [2022-07-21 02:35:37,328 INFO L226 Difference]: Without dead ends: 2591 [2022-07-21 02:35:37,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:35:37,329 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 162 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:37,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 424 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:35:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-07-21 02:35:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2194. [2022-07-21 02:35:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 1.1732786137710898) internal successors, (2573), 2193 states have internal predecessors, (2573), 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) [2022-07-21 02:35:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2573 transitions. [2022-07-21 02:35:37,853 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2573 transitions. Word has length 78 [2022-07-21 02:35:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:37,854 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 2573 transitions. [2022-07-21 02:35:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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) [2022-07-21 02:35:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2573 transitions. [2022-07-21 02:35:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 02:35:37,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:37,857 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:37,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 02:35:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:35:38,064 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash -768067294, now seen corresponding path program 10 times [2022-07-21 02:35:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:35:38,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423479096] [2022-07-21 02:35:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:35:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:35:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:35:38,066 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:35:38,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 02:35:38,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:35:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:38,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:35:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-21 02:35:38,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-21 02:35:38,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:35:38,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423479096] [2022-07-21 02:35:38,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423479096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:38,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:35:38,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-21 02:35:38,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492222587] [2022-07-21 02:35:38,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 02:35:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:35:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 02:35:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:35:38,386 INFO L87 Difference]: Start difference. First operand 2194 states and 2573 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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)