./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/simple_4-2.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-acceleration/simple_4-2.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 c1aec226fa808ce4648112e4b44dc4f177929414 ........................................................................................................................................................................................................................................................................................................................................................................................... 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 03:32:24,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:32:24,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:32:24,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:32:24,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:32:24,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:32:24,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:32:24,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:32:24,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:32:24,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:32:24,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:32:24,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:32:24,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:32:24,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:32:24,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:32:24,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:32:24,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:32:24,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:32:24,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:32:24,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:32:24,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:32:24,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:32:24,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:32:24,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:32:24,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:32:24,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:32:24,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:32:24,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:32:24,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:32:24,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:32:24,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:32:24,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:32:24,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:32:24,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:32:24,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:32:24,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:32:24,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:32:24,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:32:24,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:32:24,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:32:24,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:32:24,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:32:24,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:32:24,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:32:24,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:32:24,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:32:24,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:32:24,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:32:24,475 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:32:24,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:32:24,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:32:24,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:32:24,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:32:24,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:32:24,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:32:24,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:32:24,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:32:24,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:32:24,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:32:24,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:32:24,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:32:24,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:32:24,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:32:24,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:32:24,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:32:24,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:32:24,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1aec226fa808ce4648112e4b44dc4f177929414 [2021-08-26 03:32:24,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:32:24,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:32:24,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:32:24,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:32:24,736 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:32:24,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2021-08-26 03:32:24,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f6d5cac/624836c23b9242f6a56a68274d541f32/FLAG631ff13a8 [2021-08-26 03:32:25,095 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:32:25,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2021-08-26 03:32:25,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f6d5cac/624836c23b9242f6a56a68274d541f32/FLAG631ff13a8 [2021-08-26 03:32:25,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27f6d5cac/624836c23b9242f6a56a68274d541f32 [2021-08-26 03:32:25,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:32:25,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:32:25,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:32:25,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:32:25,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:32:25,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0527ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25, skipping insertion in model container [2021-08-26 03:32:25,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:32:25,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:32:25,643 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-acceleration/simple_4-2.c[322,335] [2021-08-26 03:32:25,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:32:25,654 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:32:25,661 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-acceleration/simple_4-2.c[322,335] [2021-08-26 03:32:25,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:32:25,671 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:32:25,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25 WrapperNode [2021-08-26 03:32:25,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:32:25,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:32:25,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:32:25,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:32:25,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:32:25,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:32:25,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:32:25,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:32:25,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:32:25,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:32:25,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:32:25,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:32:25,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (1/1) ... [2021-08-26 03:32:25,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:32:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:32:25,741 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 03:32:25,772 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 03:32:25,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:32:25,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:32:25,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:32:25,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:32:25,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:32:25,943 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:32:25,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:32:25 BoogieIcfgContainer [2021-08-26 03:32:25,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:32:25,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:32:25,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:32:25,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:32:25,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:32:25" (1/3) ... [2021-08-26 03:32:25,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5139d2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:32:25, skipping insertion in model container [2021-08-26 03:32:25,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:32:25" (2/3) ... [2021-08-26 03:32:25,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5139d2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:32:25, skipping insertion in model container [2021-08-26 03:32:25,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:32:25" (3/3) ... [2021-08-26 03:32:25,950 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2021-08-26 03:32:25,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:32:25,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:32:25,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:32:25,995 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 03:32:25,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:32:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:32:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:32:26,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:32:26,010 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:32:26,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:32:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:32:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-08-26 03:32:26,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:32:26,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836552446] [2021-08-26 03:32:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:32:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:32:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:32:26,256 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 03:32:26,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:32:26,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836552446] [2021-08-26 03:32:26,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836552446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:32:26,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:32:26,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:32:26,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511618494] [2021-08-26 03:32:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:32:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:32:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:32:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:32:26,278 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 03:32:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:32:26,299 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-08-26 03:32:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:32:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:32:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:32:26,306 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:32:26,306 INFO L226 Difference]: Without dead ends: 8 [2021-08-26 03:32:26,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:32:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-26 03:32:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-26 03:32:26,326 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) [2021-08-26 03:32:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-08-26 03:32:26,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-08-26 03:32:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:32:26,328 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-08-26 03:32:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 03:32:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-08-26 03:32:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 03:32:26,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:32:26,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:32:26,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:32:26,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:32:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:32:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-08-26 03:32:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:32:26,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563899866] [2021-08-26 03:32:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:32:26,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:32:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:32:26,420 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 03:32:26,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:32:26,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563899866] [2021-08-26 03:32:26,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563899866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:32:26,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212385807] [2021-08-26 03:32:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:32:26,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:32:26,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:32:26,432 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 03:32:26,453 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 03:32:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:32:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:32:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:32:26,591 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 03:32:26,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212385807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:32:26,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:32:26,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 03:32:26,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460737325] [2021-08-26 03:32:26,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:32:26,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:32:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:32:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:32:26,601 INFO L87 Difference]: Start difference. First operand 8 states and 8 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) [2021-08-26 03:32:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:32:26,614 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-08-26 03:32:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:32:26,615 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 7 [2021-08-26 03:32:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:32:26,616 INFO L225 Difference]: With dead ends: 13 [2021-08-26 03:32:26,616 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 03:32:26,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:32:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 03:32:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 03:32:26,620 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 03:32:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-26 03:32:26,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-08-26 03:32:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:32:26,621 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-26 03:32:26,622 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) [2021-08-26 03:32:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-26 03:32:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:32:26,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:32:26,622 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:32:26,641 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 03:32:26,842 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 03:32:26,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:32:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:32:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-08-26 03:32:26,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:32:26,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288230357] [2021-08-26 03:32:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:32:26,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:32:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:32:26,966 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 03:32:26,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:32:26,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288230357] [2021-08-26 03:32:26,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288230357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:32:26,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164034207] [2021-08-26 03:32:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:32:26,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:32:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:32:26,968 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 03:32:26,983 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 03:32:27,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 03:32:27,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:32:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:32:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:32:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:32:27,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164034207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:32:27,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:32:27,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-08-26 03:32:27,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073400162] [2021-08-26 03:32:27,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:32:27,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:32:27,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:32:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:32:27,194 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 03:32:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:32:27,212 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-08-26 03:32:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:32:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 8 [2021-08-26 03:32:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:32:27,213 INFO L225 Difference]: With dead ends: 9 [2021-08-26 03:32:27,213 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:32:27,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:32:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:32:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:32:27,214 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 03:32:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:32:27,214 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-08-26 03:32:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:32:27,214 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:32:27,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 03:32:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:32:27,215 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:32:27,216 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:32:27,234 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 03:32:27,420 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 03:32:27,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:32:27,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:32:27,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:32:27,430 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:32:27,430 INFO L860 garLoopResultBuilder]: At program point L15-2(lines 15 17) the Hoare annotation is: true [2021-08-26 03:32:27,430 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2021-08-26 03:32:27,430 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-26 03:32:27,430 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:32:27,431 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:32:27,431 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:32:27,431 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-08-26 03:32:27,431 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-08-26 03:32:27,431 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 1 20) the Hoare annotation is: true [2021-08-26 03:32:27,433 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:32:27,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:32:27 BoogieIcfgContainer [2021-08-26 03:32:27,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:32:27,437 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:32:27,437 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:32:27,437 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:32:27,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:32:25" (3/4) ... [2021-08-26 03:32:27,439 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:32:27,444 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 03:32:27,444 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:32:27,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:32:27,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:32:27,460 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:32:27,460 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:32:27,461 INFO L168 Benchmark]: Toolchain (without parser) took 1922.10 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 43.8 MB in the beginning and 44.8 MB in the end (delta: -954.0 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,461 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 45.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:32:27,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.25 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 34.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.69 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 33.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,462 INFO L168 Benchmark]: Boogie Preprocessor took 26.81 ms. Allocated memory is still 62.9 MB. Free memory was 33.1 MB in the beginning and 46.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,463 INFO L168 Benchmark]: RCFGBuilder took 225.93 ms. Allocated memory is still 62.9 MB. Free memory was 46.7 MB in the beginning and 36.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,463 INFO L168 Benchmark]: TraceAbstraction took 1491.45 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 35.6 MB in the beginning and 46.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,463 INFO L168 Benchmark]: Witness Printer took 22.93 ms. Allocated memory is still 77.6 MB. Free memory was 46.9 MB in the beginning and 44.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:32:27,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 45.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 132.25 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 34.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 18.69 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 33.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.81 ms. Allocated memory is still 62.9 MB. Free memory was 33.1 MB in the beginning and 46.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 225.93 ms. Allocated memory is still 62.9 MB. Free memory was 46.7 MB in the beginning and 36.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1491.45 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 35.6 MB in the beginning and 46.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Witness Printer took 22.93 ms. Allocated memory is still 77.6 MB. Free memory was 46.9 MB in the beginning and 44.8 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: 7]: 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, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1444.9ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 7.7ms, AutomataDifference: 85.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 8.5ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 1 SDslu, 14 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 2.8ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 23.4ms SsaConstructionTime, 85.8ms SatisfiabilityAnalysisTime, 598.9ms InterpolantComputationTime, 36 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 3 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 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: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:32:27,489 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...