./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/ddlm2013.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/loop-lit/ddlm2013.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 953c2c7138ded523b779da42ba3c8319bcf980e6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:00:36,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:00:36,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:00:36,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:00:36,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:00:36,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:00:36,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:00:36,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:00:36,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:00:36,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:00:36,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:00:36,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:00:36,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:00:36,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:00:36,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:00:36,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:00:36,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:00:36,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:00:36,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:00:36,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:00:36,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:00:36,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:00:36,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:00:36,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:00:36,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:00:36,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:00:36,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:00:36,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:00:36,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:00:36,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:00:36,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:00:36,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:00:36,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:00:36,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:00:36,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:00:36,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:00:36,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:00:36,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:00:36,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:00:36,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:00:36,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:00:36,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:00:36,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:00:36,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:00:36,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:00:36,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:00:36,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:00:36,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:00:36,177 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:00:36,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:00:36,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:00:36,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:00:36,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:00:36,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:00:36,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:00:36,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:00:36,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:00:36,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:00:36,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:00:36,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:00:36,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:00:36,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:00:36,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953c2c7138ded523b779da42ba3c8319bcf980e6 [2021-08-29 11:00:36,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:00:36,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:00:36,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:00:36,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:00:36,637 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:00:36,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/ddlm2013.i [2021-08-29 11:00:36,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7632556ae/86a38c20e9b4495cb5daf1daaad2745a/FLAG9732d2724 [2021-08-29 11:00:37,122 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:00:37,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i [2021-08-29 11:00:37,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7632556ae/86a38c20e9b4495cb5daf1daaad2745a/FLAG9732d2724 [2021-08-29 11:00:37,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7632556ae/86a38c20e9b4495cb5daf1daaad2745a [2021-08-29 11:00:37,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:00:37,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:00:37,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:00:37,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:00:37,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:00:37,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84821bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37, skipping insertion in model container [2021-08-29 11:00:37,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:00:37,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:00:37,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2021-08-29 11:00:37,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:00:37,288 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:00:37,299 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2021-08-29 11:00:37,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:00:37,309 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:00:37,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37 WrapperNode [2021-08-29 11:00:37,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:00:37,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:00:37,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:00:37,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:00:37,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:00:37,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:00:37,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:00:37,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:00:37,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:00:37,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:00:37,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:00:37,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:00:37,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (1/1) ... [2021-08-29 11:00:37,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:00:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:37,418 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) [2021-08-29 11:00:37,439 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 [2021-08-29 11:00:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:00:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:00:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:00:37,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:00:37,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:00:37,552 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 11:00:37,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:37 BoogieIcfgContainer [2021-08-29 11:00:37,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:00:37,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:00:37,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:00:37,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:00:37,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:00:37" (1/3) ... [2021-08-29 11:00:37,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1db8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:00:37, skipping insertion in model container [2021-08-29 11:00:37,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:37" (2/3) ... [2021-08-29 11:00:37,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1db8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:00:37, skipping insertion in model container [2021-08-29 11:00:37,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:37" (3/3) ... [2021-08-29 11:00:37,557 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-08-29 11:00:37,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:00:37,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:00:37,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:00:37,605 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 11:00:37,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:00:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 11:00:37,623 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:37,623 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:37,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1805459912, now seen corresponding path program 1 times [2021-08-29 11:00:37,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:37,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746030084] [2021-08-29 11:00:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:37,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:37,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:37,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746030084] [2021-08-29 11:00:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746030084] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:37,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:37,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 11:00:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211322672] [2021-08-29 11:00:37,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 11:00:37,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 11:00:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:00:37,810 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:37,871 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-08-29 11:00:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 11:00:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-08-29 11:00:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:37,878 INFO L225 Difference]: With dead ends: 22 [2021-08-29 11:00:37,878 INFO L226 Difference]: Without dead ends: 10 [2021-08-29 11:00:37,880 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:00:37,896 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.05ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:37,897 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 17 Unknown, 0 Unchecked, 0.19ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 52.05ms Time] [2021-08-29 11:00:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-29 11:00:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-29 11:00:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-08-29 11:00:37,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-08-29 11:00:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:37,933 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-29 11:00:37,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-08-29 11:00:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 11:00:37,941 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:37,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:37,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:00:37,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash 122256666, now seen corresponding path program 1 times [2021-08-29 11:00:37,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:37,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65198192] [2021-08-29 11:00:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:37,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:38,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:38,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65198192] [2021-08-29 11:00:38,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65198192] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:38,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:38,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 11:00:38,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301896826] [2021-08-29 11:00:38,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:00:38,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:00:38,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:00:38,070 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:38,112 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-08-29 11:00:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:00:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-08-29 11:00:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:38,113 INFO L225 Difference]: With dead ends: 16 [2021-08-29 11:00:38,113 INFO L226 Difference]: Without dead ends: 12 [2021-08-29 11:00:38,114 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 11:00:38,115 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.28ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:38,115 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 33 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 32.28ms Time] [2021-08-29 11:00:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-29 11:00:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-29 11:00:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-29 11:00:38,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-08-29 11:00:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:38,117 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-29 11:00:38,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-29 11:00:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 11:00:38,118 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:38,118 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:38,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 11:00:38,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1514407247, now seen corresponding path program 1 times [2021-08-29 11:00:38,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:38,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805783785] [2021-08-29 11:00:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:38,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805783785] [2021-08-29 11:00:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805783785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637406663] [2021-08-29 11:00:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:38,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:38,434 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) [2021-08-29 11:00:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 11:00:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 11:00:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:38,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:38,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637406663] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:38,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2021-08-29 11:00:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848897553] [2021-08-29 11:00:38,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 11:00:38,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 11:00:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:00:38,705 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-08-29 11:00:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:38,811 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-29 11:00:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 11:00:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 11 [2021-08-29 11:00:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:38,813 INFO L225 Difference]: With dead ends: 21 [2021-08-29 11:00:38,813 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 11:00:38,815 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 142.68ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-29 11:00:38,816 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.72ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:38,816 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 70.72ms Time] [2021-08-29 11:00:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 11:00:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-08-29 11:00:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-08-29 11:00:38,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-08-29 11:00:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:38,818 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-08-29 11:00:38,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-08-29 11:00:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-08-29 11:00:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 11:00:38,819 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:38,819 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:38,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 11:00:39,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:39,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2100501679, now seen corresponding path program 1 times [2021-08-29 11:00:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:39,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416826067] [2021-08-29 11:00:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:39,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 11:00:39,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:39,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416826067] [2021-08-29 11:00:39,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416826067] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:39,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:39,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:00:39,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330946645] [2021-08-29 11:00:39,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:00:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:00:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:39,071 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:39,086 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-08-29 11:00:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:00:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 11:00:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:39,087 INFO L225 Difference]: With dead ends: 24 [2021-08-29 11:00:39,087 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 11:00:39,087 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:39,088 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.84ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:39,088 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.13ms Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 13.84ms Time] [2021-08-29 11:00:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 11:00:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 11:00:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-08-29 11:00:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-29 11:00:39,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-08-29 11:00:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:39,090 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-29 11:00:39,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-29 11:00:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 11:00:39,090 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:39,091 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:39,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 11:00:39,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1426811654, now seen corresponding path program 2 times [2021-08-29 11:00:39,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:39,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851007359] [2021-08-29 11:00:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:39,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:39,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851007359] [2021-08-29 11:00:39,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851007359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:39,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072837291] [2021-08-29 11:00:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 11:00:39,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:39,198 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) [2021-08-29 11:00:39,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 11:00:39,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 11:00:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:00:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 11:00:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:39,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072837291] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:39,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:39,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-08-29 11:00:39,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504810177] [2021-08-29 11:00:39,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-29 11:00:39,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-29 11:00:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-29 11:00:39,549 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:40,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:00:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:41,502 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-08-29 11:00:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 11:00:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 11:00:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:41,503 INFO L225 Difference]: With dead ends: 42 [2021-08-29 11:00:41,503 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 11:00:41,504 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 859.92ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-08-29 11:00:41,504 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1214.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1228.36ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:41,504 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [12 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1228.36ms Time] [2021-08-29 11:00:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 11:00:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-08-29 11:00:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-29 11:00:41,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-08-29 11:00:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:41,507 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-29 11:00:41,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-29 11:00:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 11:00:41,507 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:41,507 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:41,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 11:00:41,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:41,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -971227279, now seen corresponding path program 1 times [2021-08-29 11:00:41,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:41,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072137292] [2021-08-29 11:00:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:41,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 11:00:41,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:41,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072137292] [2021-08-29 11:00:41,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072137292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:41,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147726890] [2021-08-29 11:00:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:41,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:41,780 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) [2021-08-29 11:00:41,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 11:00:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 11:00:41,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 11:00:41,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 11:00:41,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147726890] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:41,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:00:41,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 7 [2021-08-29 11:00:41,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789726198] [2021-08-29 11:00:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:00:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:41,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:00:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:00:41,907 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:41,915 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-08-29 11:00:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:00:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 11:00:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:41,916 INFO L225 Difference]: With dead ends: 18 [2021-08-29 11:00:41,916 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:00:41,917 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.54ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:00:41,917 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.20ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:41,917 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 8 Unknown, 0 Unchecked, 0.08ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 6.20ms Time] [2021-08-29 11:00:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:00:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:00:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:00:41,919 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-08-29 11:00:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:41,919 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:00:41,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:00:41,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:00:41,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:00:41,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 11:00:42,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:42,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:00:42,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:00:42,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L861 garLoopResultBuilder]: At program point L48(lines 24 49) the Hoare annotation is: true [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:00:42,140 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:00:42,141 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 11:00:42,142 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-29 11:00:42,142 INFO L861 garLoopResultBuilder]: At program point L45(lines 45 47) the Hoare annotation is: true [2021-08-29 11:00:42,142 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2021-08-29 11:00:42,142 INFO L858 garLoopResultBuilder]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2021-08-29 11:00:42,142 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 44) no Hoare annotation was computed. [2021-08-29 11:00:42,159 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:00:42,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:00:42 BoogieIcfgContainer [2021-08-29 11:00:42,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:00:42,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:00:42,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:00:42,181 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:00:42,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:37" (3/4) ... [2021-08-29 11:00:42,184 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:00:42,191 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 11:00:42,192 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:00:42,192 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:00:42,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:00:42,256 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:00:42,256 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:00:42,257 INFO L158 Benchmark]: Toolchain (without parser) took 5113.34ms. Allocated memory was 65.0MB in the beginning and 88.1MB in the end (delta: 23.1MB). Free memory was 45.5MB in the beginning and 68.6MB in the end (delta: -23.1MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,257 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 45.9MB in the beginning and 45.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:00:42,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.39ms. Allocated memory is still 65.0MB. Free memory was 45.3MB in the beginning and 35.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,258 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.98ms. Allocated memory is still 65.0MB. Free memory was 35.5MB in the beginning and 48.2MB in the end (delta: -12.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,258 INFO L158 Benchmark]: Boogie Preprocessor took 29.01ms. Allocated memory is still 65.0MB. Free memory was 48.2MB in the beginning and 47.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:00:42,258 INFO L158 Benchmark]: RCFGBuilder took 163.98ms. Allocated memory is still 65.0MB. Free memory was 47.1MB in the beginning and 38.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,258 INFO L158 Benchmark]: TraceAbstraction took 4626.89ms. Allocated memory was 65.0MB in the beginning and 88.1MB in the end (delta: 23.1MB). Free memory was 38.3MB in the beginning and 26.6MB in the end (delta: 11.7MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,259 INFO L158 Benchmark]: Witness Printer took 75.29ms. Allocated memory is still 88.1MB. Free memory was 26.6MB in the beginning and 68.6MB in the end (delta: -42.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:00:42,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 45.9MB in the beginning and 45.9MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.39ms. Allocated memory is still 65.0MB. Free memory was 45.3MB in the beginning and 35.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.98ms. Allocated memory is still 65.0MB. Free memory was 35.5MB in the beginning and 48.2MB in the end (delta: -12.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.01ms. Allocated memory is still 65.0MB. Free memory was 48.2MB in the beginning and 47.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 163.98ms. Allocated memory is still 65.0MB. Free memory was 47.1MB in the beginning and 38.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4626.89ms. Allocated memory was 65.0MB in the beginning and 88.1MB in the end (delta: 23.1MB). Free memory was 38.3MB in the beginning and 26.6MB in the end (delta: 11.7MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * Witness Printer took 75.29ms. Allocated memory is still 88.1MB. Free memory was 26.6MB in the beginning and 68.6MB in the end (delta: -42.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4565.11ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 9.74ms, AutomataDifference: 2253.32ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 10.40ms, InitialAbstractionConstructionTime: 9.79ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 1403.45ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1361.29ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 131 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 322 IncrementalHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 0 mSDtfsCounter, 322 mSolverCounterSat, 4.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1036.90ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 32.77ms AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 5.29ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.79ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.08ms SsaConstructionTime, 137.15ms SatisfiabilityAnalysisTime, 1199.71ms InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 999 SizeOfPredicates, 9 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 41/74 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:00:42,301 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...