./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_1.c --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-simple/nested_1.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 93aa307414725b3a49c1b13f393768ab9b3a7f92 ....................................................................................................................................................................................................................................................................................................................................................................................... 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 11:46:03,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:46:03,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:46:03,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:46:03,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:46:03,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:46:03,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:46:03,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:46:03,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:46:03,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:46:03,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:46:03,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:46:03,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:46:03,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:46:03,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:46:03,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:46:03,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:46:03,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:46:03,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:46:03,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:46:03,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:46:03,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:46:03,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:46:03,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:46:03,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:46:03,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:46:03,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:46:03,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:46:03,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:46:03,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:46:03,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:46:03,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:46:03,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:46:03,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:46:03,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:46:03,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:46:03,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:46:03,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:46:03,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:46:03,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:46:03,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:46:03,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:46:03,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:46:03,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:46:03,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:46:03,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:46:03,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:46:03,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:46:03,161 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:46:03,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:46:03,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:46:03,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:46:03,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:46:03,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:46:03,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:46:03,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:46:03,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:46:03,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:46:03,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:46:03,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:46:03,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:46:03,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:46:03,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:46:03,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:46:03,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:46:03,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:46:03,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:46:03,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:46:03,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:46:03,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:46:03,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:46:03,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:46:03,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93aa307414725b3a49c1b13f393768ab9b3a7f92 [2021-08-29 11:46:03,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:46:03,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:46:03,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:46:03,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:46:03,433 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:46:03,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_1.c [2021-08-29 11:46:03,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54b85be5/35b52dc296c648ccbbf77d20b4115d17/FLAG6546f62c4 [2021-08-29 11:46:03,837 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:46:03,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_1.c [2021-08-29 11:46:03,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54b85be5/35b52dc296c648ccbbf77d20b4115d17/FLAG6546f62c4 [2021-08-29 11:46:03,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54b85be5/35b52dc296c648ccbbf77d20b4115d17 [2021-08-29 11:46:03,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:46:03,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:46:03,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:46:03,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:46:03,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:46:03,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:03,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c096f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03, skipping insertion in model container [2021-08-29 11:46:03,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:03,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:46:03,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:46:03,954 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-simple/nested_1.c[676,689] [2021-08-29 11:46:03,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:46:03,978 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:46:03,985 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-simple/nested_1.c[676,689] [2021-08-29 11:46:03,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:46:03,994 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:46:03,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03 WrapperNode [2021-08-29 11:46:03,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:46:03,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:46:03,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:46:03,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:46:03,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:46:04,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:46:04,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:46:04,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:46:04,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:46:04,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:46:04,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:46:04,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:46:04,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (1/1) ... [2021-08-29 11:46:04,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:46:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:04,069 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 11:46:04,092 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 11:46:04,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:46:04,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:46:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:46:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:46:04,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:46:04,212 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-29 11:46:04,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:04 BoogieIcfgContainer [2021-08-29 11:46:04,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:46:04,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:46:04,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:46:04,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:46:04,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:46:03" (1/3) ... [2021-08-29 11:46:04,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8817a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:04, skipping insertion in model container [2021-08-29 11:46:04,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:03" (2/3) ... [2021-08-29 11:46:04,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8817a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:04, skipping insertion in model container [2021-08-29 11:46:04,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:04" (3/3) ... [2021-08-29 11:46:04,220 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.c [2021-08-29 11:46:04,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:46:04,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:46:04,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:46:04,258 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 11:46:04,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:46:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:46:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-29 11:46:04,271 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:04,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-29 11:46:04,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:04,278 INFO L82 PathProgramCache]: Analyzing trace with hash 28696998, now seen corresponding path program 1 times [2021-08-29 11:46:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:04,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122127852] [2021-08-29 11:46:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:04,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:04,480 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 11:46:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:04,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122127852] [2021-08-29 11:46:04,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122127852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:04,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:04,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:46:04,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621199613] [2021-08-29 11:46:04,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:46:04,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:46:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:04,510 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 11:46:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:04,583 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-08-29 11:46:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:46:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-08-29 11:46:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:04,590 INFO L225 Difference]: With dead ends: 20 [2021-08-29 11:46:04,590 INFO L226 Difference]: Without dead ends: 9 [2021-08-29 11:46:04,592 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.40ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:04,594 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.64ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:04,594 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 61.64ms Time] [2021-08-29 11:46:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-29 11:46:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-08-29 11:46:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 11:46:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-08-29 11:46:04,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-08-29 11:46:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-08-29 11:46:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 11:46:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-08-29 11:46:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 11:46:04,621 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:04,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:04,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:46:04,622 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1809669604, now seen corresponding path program 1 times [2021-08-29 11:46:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:04,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865614339] [2021-08-29 11:46:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:04,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:04,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:04,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865614339] [2021-08-29 11:46:04,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865614339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:04,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996275228] [2021-08-29 11:46:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:04,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:04,670 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 11:46:04,671 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 11:46:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 11:46:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:04,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996275228] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:04,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:04,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-29 11:46:04,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244161815] [2021-08-29 11:46:04,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 11:46:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 11:46:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:46:04,778 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 11:46:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:04,823 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-08-29 11:46:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:46:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 7 [2021-08-29 11:46:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:04,823 INFO L225 Difference]: With dead ends: 17 [2021-08-29 11:46:04,823 INFO L226 Difference]: Without dead ends: 14 [2021-08-29 11:46:04,824 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.90ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:46:04,825 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.78ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:04,825 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 39.78ms Time] [2021-08-29 11:46:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-29 11:46:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-29 11:46:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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 11:46:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-08-29 11:46:04,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2021-08-29 11:46:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:04,839 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-08-29 11:46:04,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 11:46:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-08-29 11:46:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 11:46:04,840 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:04,840 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-08-29 11:46:04,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 11:46:05,049 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 [2021-08-29 11:46:05,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 82232734, now seen corresponding path program 2 times [2021-08-29 11:46:05,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:05,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942662199] [2021-08-29 11:46:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:05,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 11:46:05,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:05,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942662199] [2021-08-29 11:46:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942662199] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:05,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 11:46:05,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400726004] [2021-08-29 11:46:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:46:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:46:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 11:46:05,138 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-08-29 11:46:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:05,154 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-08-29 11:46:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:46:05,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 13 [2021-08-29 11:46:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:05,155 INFO L225 Difference]: With dead ends: 14 [2021-08-29 11:46:05,155 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:46:05,156 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.09ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 11:46:05,159 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.22ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:05,160 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 12.22ms Time] [2021-08-29 11:46:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:46:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:46:05,161 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 11:46:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:46:05,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-08-29 11:46:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:46:05,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-08-29 11:46:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:46:05,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:46:05,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:46:05,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 11:46:05,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:46:05,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:05,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:05,191 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:46:05,191 INFO L861 garLoopResultBuilder]: At program point L25(lines 15 26) the Hoare annotation is: true [2021-08-29 11:46:05,191 INFO L858 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2021-08-29 11:46:05,191 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 19 21) no Hoare annotation was computed. [2021-08-29 11:46:05,192 INFO L854 garLoopResultBuilder]: At program point L19-3(lines 19 21) the Hoare annotation is: (<= ULTIMATE.start_main_~a~0 6) [2021-08-29 11:46:05,192 INFO L858 garLoopResultBuilder]: For program point L19-4(lines 15 26) no Hoare annotation was computed. [2021-08-29 11:46:05,192 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:46:05,192 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:46:05,192 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:46:05,192 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2021-08-29 11:46:05,193 INFO L858 garLoopResultBuilder]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2021-08-29 11:46:05,198 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:46:05,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:46:05 BoogieIcfgContainer [2021-08-29 11:46:05,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:46:05,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:46:05,210 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:46:05,210 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:46:05,210 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:04" (3/4) ... [2021-08-29 11:46:05,214 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:46:05,225 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 11:46:05,226 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:46:05,226 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:46:05,226 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:46:05,242 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:46:05,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:46:05,242 INFO L158 Benchmark]: Toolchain (without parser) took 1390.17ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 43.8MB in the beginning and 48.8MB in the end (delta: -5.1MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,243 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 43.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:46:05,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.34ms. Allocated memory is still 62.9MB. Free memory was 43.5MB in the beginning and 34.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,243 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.44ms. Allocated memory is still 62.9MB. Free memory was 34.4MB in the beginning and 33.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,243 INFO L158 Benchmark]: Boogie Preprocessor took 23.89ms. Allocated memory is still 62.9MB. Free memory was 33.0MB in the beginning and 32.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:46:05,244 INFO L158 Benchmark]: RCFGBuilder took 176.49ms. Allocated memory is still 62.9MB. Free memory was 32.0MB in the beginning and 40.0MB in the end (delta: -8.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,244 INFO L158 Benchmark]: TraceAbstraction took 994.23ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 39.5MB in the beginning and 51.0MB in the end (delta: -11.4MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,244 INFO L158 Benchmark]: Witness Printer took 32.21ms. Allocated memory is still 77.6MB. Free memory was 51.0MB in the beginning and 48.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:46:05,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 43.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.34ms. Allocated memory is still 62.9MB. Free memory was 43.5MB in the beginning and 34.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.44ms. Allocated memory is still 62.9MB. Free memory was 34.4MB in the beginning and 33.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.89ms. Allocated memory is still 62.9MB. Free memory was 33.0MB in the beginning and 32.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 176.49ms. Allocated memory is still 62.9MB. Free memory was 32.0MB in the beginning and 40.0MB in the end (delta: -8.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * TraceAbstraction took 994.23ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 39.5MB in the beginning and 51.0MB in the end (delta: -11.4MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. * Witness Printer took 32.21ms. Allocated memory is still 77.6MB. Free memory was 51.0MB in the beginning and 48.8MB in the end (delta: 2.1MB). 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: 23]: 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: 945.01ms, OverallIterations: 3, TraceHistogramMax: 4, EmptinessCheckTime: 7.13ms, AutomataDifference: 180.12ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 27.10ms, InitialAbstractionConstructionTime: 6.11ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10 SdHoareTripleChecker+Valid, 113.65ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 79.54ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52 IncrementalHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 52 mSolverCounterSat, 1.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.38ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 29.61ms AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 4 HoareAnnotationTreeSize, 2 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 15.03ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 7.94ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 17.26ms SsaConstructionTime, 49.96ms SatisfiabilityAnalysisTime, 283.02ms InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 16/19 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: a <= 6 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:46:05,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...