./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gsv2008.c.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/gsv2008.c.i.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27bb8f686f653bdbe880104ff392667919def88e ..................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:46:25,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:46:25,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:46:25,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:46:25,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:46:25,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:46:25,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:46:25,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:46:25,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:46:25,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:46:25,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:46:25,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:46:25,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:46:25,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:46:25,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:46:25,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:46:25,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:46:25,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:46:25,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:46:25,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:46:25,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:46:25,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:46:25,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:46:25,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:46:25,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:46:25,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:46:25,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:46:25,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:46:25,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:46:25,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:46:25,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:46:25,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:46:25,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:46:25,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:46:25,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:46:25,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:46:25,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:46:25,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:46:25,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:46:25,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:46:25,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:46:25,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:46:25,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:46:25,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:46:25,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:46:25,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:46:25,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:46:25,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:46:25,712 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:46:25,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:46:25,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:46:25,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:46:25,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:46:25,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:46:25,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:46:25,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:46:25,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:46:25,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:46:25,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:46:25,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:46:25,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27bb8f686f653bdbe880104ff392667919def88e [2021-08-26 03:46:26,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:46:26,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:46:26,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:46:26,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:46:26,032 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:46:26,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-08-26 03:46:26,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a6b5bd/b425c30069384de580e25e5521528798/FLAG9a99012e4 [2021-08-26 03:46:26,552 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:46:26,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-08-26 03:46:26,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a6b5bd/b425c30069384de580e25e5521528798/FLAG9a99012e4 [2021-08-26 03:46:26,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0a6b5bd/b425c30069384de580e25e5521528798 [2021-08-26 03:46:26,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:46:26,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:46:26,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:46:26,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:46:26,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:46:26,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:46:26" (1/1) ... [2021-08-26 03:46:26,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730825b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:26, skipping insertion in model container [2021-08-26 03:46:26,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:46:26" (1/1) ... [2021-08-26 03:46:26,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:46:26,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:46:27,081 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/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-08-26 03:46:27,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:46:27,090 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:46:27,108 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/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-08-26 03:46:27,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:46:27,124 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:46:27,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27 WrapperNode [2021-08-26 03:46:27,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:46:27,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:46:27,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:46:27,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:46:27,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:46:27,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:46:27,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:46:27,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:46:27,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:46:27,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:46:27,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:46:27,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:46:27,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (1/1) ... [2021-08-26 03:46:27,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:46:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:27,221 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) [2021-08-26 03:46:27,228 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 [2021-08-26 03:46:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:46:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:46:27,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:46:27,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:46:27,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:46:27,448 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-26 03:46:27,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:46:27 BoogieIcfgContainer [2021-08-26 03:46:27,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:46:27,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:46:27,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:46:27,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:46:27,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:46:26" (1/3) ... [2021-08-26 03:46:27,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc0299f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:46:27, skipping insertion in model container [2021-08-26 03:46:27,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:46:27" (2/3) ... [2021-08-26 03:46:27,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc0299f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:46:27, skipping insertion in model container [2021-08-26 03:46:27,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:46:27" (3/3) ... [2021-08-26 03:46:27,456 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2021-08-26 03:46:27,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:46:27,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:46:27,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:46:27,502 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 [2021-08-26 03:46:27,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:46:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2021-08-26 03:46:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 03:46:27,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:27,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:27,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2021-08-26 03:46:27,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:27,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515814080] [2021-08-26 03:46:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:27,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:27,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:27,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515814080] [2021-08-26 03:46:27,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515814080] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:46:27,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:46:27,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:46:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419784242] [2021-08-26 03:46:27,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:46:27,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:46:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:46:27,801 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-08-26 03:46:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:27,818 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-26 03:46:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:46:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-08-26 03:46:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:27,826 INFO L225 Difference]: With dead ends: 21 [2021-08-26 03:46:27,826 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 03:46:27,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:46:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 03:46:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 03:46:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-26 03:46:27,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-08-26 03:46:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:27,852 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-26 03:46:27,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-08-26 03:46:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-26 03:46:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:46:27,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:27,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:27,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:46:27,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2021-08-26 03:46:27,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:27,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729181102] [2021-08-26 03:46:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:27,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:27,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729181102] [2021-08-26 03:46:27,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729181102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:27,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38495791] [2021-08-26 03:46:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:27,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:27,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:27,968 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) [2021-08-26 03:46:27,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:46:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:28,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:46:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38495791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:28,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:28,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:46:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986972068] [2021-08-26 03:46:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:46:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:46:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:46:28,188 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-08-26 03:46:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:28,222 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-08-26 03:46:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:46:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 8 [2021-08-26 03:46:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:28,224 INFO L225 Difference]: With dead ends: 13 [2021-08-26 03:46:28,224 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 03:46:28,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:46:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 03:46:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 03:46:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-08-26 03:46:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-26 03:46:28,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-08-26 03:46:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:28,228 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-26 03:46:28,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-08-26 03:46:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-26 03:46:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:46:28,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:28,229 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:28,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:28,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:28,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2021-08-26 03:46:28,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:28,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394705529] [2021-08-26 03:46:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:28,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:28,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:28,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394705529] [2021-08-26 03:46:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394705529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:28,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552006410] [2021-08-26 03:46:28,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:28,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:28,522 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) [2021-08-26 03:46:28,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:46:28,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:28,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 03:46:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:28,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552006410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:28,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:28,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 03:46:28,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993924296] [2021-08-26 03:46:28,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:46:28,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:46:28,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:46:28,689 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:28,722 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-08-26 03:46:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:46:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 03:46:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:28,723 INFO L225 Difference]: With dead ends: 14 [2021-08-26 03:46:28,723 INFO L226 Difference]: Without dead ends: 11 [2021-08-26 03:46:28,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:46:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-26 03:46:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-26 03:46:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-08-26 03:46:28,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-08-26 03:46:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:28,726 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-08-26 03:46:28,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-08-26 03:46:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 03:46:28,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:28,727 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:28,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 03:46:28,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2021-08-26 03:46:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:28,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174226126] [2021-08-26 03:46:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:28,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:46:29,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:29,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174226126] [2021-08-26 03:46:29,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174226126] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:46:29,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:46:29,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:46:29,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505104226] [2021-08-26 03:46:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:46:29,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:46:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:46:29,010 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:29,022 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-08-26 03:46:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:46:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 03:46:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:29,023 INFO L225 Difference]: With dead ends: 11 [2021-08-26 03:46:29,023 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:46:29,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:46:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:46:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:46:29,024 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) [2021-08-26 03:46:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:46:29,024 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-08-26 03:46:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:29,024 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:46:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:46:29,025 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:46:29,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:46:29,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 03:46:29,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:46:29,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:46:29,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:46:29,053 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:46:29,054 INFO L857 garLoopResultBuilder]: For program point L25(lines 25 58) no Hoare annotation was computed. [2021-08-26 03:46:29,054 INFO L860 garLoopResultBuilder]: At program point L54(lines 13 60) the Hoare annotation is: true [2021-08-26 03:46:29,054 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 59) no Hoare annotation was computed. [2021-08-26 03:46:29,054 INFO L857 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-08-26 03:46:29,054 INFO L857 garLoopResultBuilder]: For program point L46(lines 46 55) no Hoare annotation was computed. [2021-08-26 03:46:29,055 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:46:29,055 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:46:29,055 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:46:29,055 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2021-08-26 03:46:29,056 INFO L853 garLoopResultBuilder]: At program point L37(lines 30 58) the Hoare annotation is: (or (<= (+ ULTIMATE.start_main_~main__x~0 2) ULTIMATE.start_main_~main__y~0) (<= (+ ULTIMATE.start_main_~main__x~0 50) 0)) [2021-08-26 03:46:29,060 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:46:29,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:46:29 BoogieIcfgContainer [2021-08-26 03:46:29,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:46:29,075 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:46:29,075 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:46:29,075 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:46:29,076 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:46:27" (3/4) ... [2021-08-26 03:46:29,079 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:46:29,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 03:46:29,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:46:29,090 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:46:29,090 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:46:29,131 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:46:29,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:46:29,132 INFO L168 Benchmark]: Toolchain (without parser) took 2174.66 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 56.2 MB in the beginning and 75.6 MB in the end (delta: -19.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,133 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:46:29,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.30 ms. Allocated memory is still 73.4 MB. Free memory was 55.9 MB in the beginning and 46.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 73.4 MB. Free memory was 46.4 MB in the beginning and 44.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,135 INFO L168 Benchmark]: Boogie Preprocessor took 42.55 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 57.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,136 INFO L168 Benchmark]: RCFGBuilder took 253.70 ms. Allocated memory is still 73.4 MB. Free memory was 56.7 MB in the beginning and 45.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,136 INFO L168 Benchmark]: TraceAbstraction took 1623.84 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 45.1 MB in the beginning and 77.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,139 INFO L168 Benchmark]: Witness Printer took 55.95 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 75.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:46:29,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 167.30 ms. Allocated memory is still 73.4 MB. Free memory was 55.9 MB in the beginning and 46.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 73.4 MB. Free memory was 46.4 MB in the beginning and 44.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.55 ms. Allocated memory is still 73.4 MB. Free memory was 44.9 MB in the beginning and 57.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 253.70 ms. Allocated memory is still 73.4 MB. Free memory was 56.7 MB in the beginning and 45.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1623.84 ms. Allocated memory was 73.4 MB in the beginning and 104.9 MB in the end (delta: 31.5 MB). Free memory was 45.1 MB in the beginning and 77.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. * Witness Printer took 55.95 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 75.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: 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, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1565.1ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 7.7ms, AutomataDifference: 128.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 25.3ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 7 SDslu, 42 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 13.6ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 6.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 25.1ms SsaConstructionTime, 106.8ms SatisfiabilityAnalysisTime, 572.2ms InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 150 SizeOfPredicates, 6 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 6/14 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: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: main__x + 2 <= main__y || main__x + 50 <= 0 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:46:29,174 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...