./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/for_bounded_loop1.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/loops/for_bounded_loop1.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 108d15887a93306fe736fe6c2e7f14ff3dbea99b ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:03:32,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:03:32,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:03:32,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:03:32,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:03:32,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:03:32,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:03:32,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:03:32,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:03:32,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:03:32,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:03:32,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:03:32,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:03:32,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:03:32,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:03:32,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:03:32,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:03:32,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:03:32,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:03:32,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:03:32,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:03:32,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:03:32,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:03:32,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:03:32,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:03:32,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:03:32,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:03:32,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:03:32,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:03:32,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:03:32,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:03:32,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:03:32,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:03:32,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:03:32,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:03:32,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:03:32,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:03:32,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:03:32,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:03:32,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:03:32,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:03:32,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:03:32,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:03:32,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:03:32,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:03:32,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:03:32,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:03:32,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:03:32,440 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:03:32,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:03:32,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:03:32,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:03:32,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:03:32,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:03:32,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:03:32,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:03:32,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:03:32,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:03:32,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:32,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:03:32,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:03:32,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 108d15887a93306fe736fe6c2e7f14ff3dbea99b [2021-08-26 03:03:32,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:03:32,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:03:32,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:03:32,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:03:32,763 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:03:32,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/for_bounded_loop1.c [2021-08-26 03:03:32,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c9ef485/64632093bbe04800b0afbe8c08f5473d/FLAG143c1bd90 [2021-08-26 03:03:33,155 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:03:33,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c [2021-08-26 03:03:33,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c9ef485/64632093bbe04800b0afbe8c08f5473d/FLAG143c1bd90 [2021-08-26 03:03:33,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c9ef485/64632093bbe04800b0afbe8c08f5473d [2021-08-26 03:03:33,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:03:33,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:03:33,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:33,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:03:33,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:03:33,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6186f52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33, skipping insertion in model container [2021-08-26 03:03:33,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:03:33,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:03:33,688 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/loops/for_bounded_loop1.c[416,429] [2021-08-26 03:03:33,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:33,700 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:03:33,708 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/loops/for_bounded_loop1.c[416,429] [2021-08-26 03:03:33,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:33,723 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:03:33,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33 WrapperNode [2021-08-26 03:03:33,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:33,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:33,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:03:33,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:03:33,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:33,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:03:33,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:03:33,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:03:33,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:03:33,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:03:33,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:03:33,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:03:33,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (1/1) ... [2021-08-26 03:03:33,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:33,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:33,831 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 03:03:33,856 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 03:03:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:03:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:03:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:03:33,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:03:34,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:03:34,106 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-26 03:03:34,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:34 BoogieIcfgContainer [2021-08-26 03:03:34,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:03:34,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:03:34,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:03:34,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:03:34,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:03:33" (1/3) ... [2021-08-26 03:03:34,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387ddbc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:34, skipping insertion in model container [2021-08-26 03:03:34,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:33" (2/3) ... [2021-08-26 03:03:34,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387ddbc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:34, skipping insertion in model container [2021-08-26 03:03:34,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:34" (3/3) ... [2021-08-26 03:03:34,113 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-08-26 03:03:34,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:03:34,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 03:03:34,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:03:34,176 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 03:03:34,176 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 03:03:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:03:34,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:34,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:03:34,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:34,203 INFO L82 PathProgramCache]: Analyzing trace with hash 889574253, now seen corresponding path program 1 times [2021-08-26 03:03:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:34,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259809482] [2021-08-26 03:03:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:34,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:34,418 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 03:03:34,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:34,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259809482] [2021-08-26 03:03:34,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259809482] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:34,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:34,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:03:34,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746753278] [2021-08-26 03:03:34,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:03:34,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:03:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:03:34,444 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 03:03:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:34,518 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-08-26 03:03:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:03:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 03:03:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:34,525 INFO L225 Difference]: With dead ends: 48 [2021-08-26 03:03:34,525 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 03:03:34,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:03:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 03:03:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-08-26 03:03:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-08-26 03:03:34,550 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 6 [2021-08-26 03:03:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:34,551 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-08-26 03:03:34,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 03:03:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-08-26 03:03:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:03:34,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:34,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:03:34,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1363182035, now seen corresponding path program 1 times [2021-08-26 03:03:34,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:34,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966535942] [2021-08-26 03:03:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:34,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:34,747 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 03:03:34,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:34,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966535942] [2021-08-26 03:03:34,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966535942] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:34,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:34,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 03:03:34,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482957406] [2021-08-26 03:03:34,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:03:34,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:03:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:03:34,749 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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 03:03:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:34,841 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-08-26 03:03:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:03:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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 9 [2021-08-26 03:03:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:34,843 INFO L225 Difference]: With dead ends: 30 [2021-08-26 03:03:34,843 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 03:03:34,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:03:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 03:03:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-08-26 03:03:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 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 03:03:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-26 03:03:34,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2021-08-26 03:03:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:34,847 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-26 03:03:34,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 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 03:03:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-26 03:03:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:03:34,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:34,848 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:34,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:03:34,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1645062140, now seen corresponding path program 1 times [2021-08-26 03:03:34,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:34,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855745003] [2021-08-26 03:03:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:34,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:34,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855745003] [2021-08-26 03:03:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855745003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525696391] [2021-08-26 03:03:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:34,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:34,935 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 03:03:34,936 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 03:03:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:03:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525696391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:35,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:35,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-26 03:03:35,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929577946] [2021-08-26 03:03:35,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:03:35,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:03:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:03:35,139 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:35,233 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-08-26 03:03:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:03:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 03:03:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:35,235 INFO L225 Difference]: With dead ends: 22 [2021-08-26 03:03:35,236 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 03:03:35,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:03:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 03:03:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-08-26 03:03:35,241 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) [2021-08-26 03:03:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-08-26 03:03:35,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-08-26 03:03:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:35,243 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-08-26 03:03:35,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-08-26 03:03:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 03:03:35,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:35,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:35,267 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 03:03:35,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:35,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash -542711943, now seen corresponding path program 1 times [2021-08-26 03:03:35,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:35,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915899135] [2021-08-26 03:03:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:35,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:03:35,470 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:03:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:03:35,499 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:03:35,499 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:03:35,500 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:35,501 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:35,501 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:35,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 03:03:35,505 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:03:35,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:03:35 BoogieIcfgContainer [2021-08-26 03:03:35,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:03:35,519 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:03:35,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:03:35,519 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:03:35,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:34" (3/4) ... [2021-08-26 03:03:35,520 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:03:35,560 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:03:35,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:03:35,562 INFO L168 Benchmark]: Toolchain (without parser) took 1978.09 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 45.6 MB in the beginning and 33.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,562 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.1 MB in the beginning and 47.1 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:35,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.65 ms. Allocated memory is still 65.0 MB. Free memory was 45.5 MB in the beginning and 49.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.15 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 48.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,567 INFO L168 Benchmark]: Boogie Preprocessor took 34.18 ms. Allocated memory is still 65.0 MB. Free memory was 48.2 MB in the beginning and 47.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:35,567 INFO L168 Benchmark]: RCFGBuilder took 310.28 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 34.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,567 INFO L168 Benchmark]: TraceAbstraction took 1409.85 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 34.0 MB in the beginning and 35.8 MB in the end (delta: -1.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,567 INFO L168 Benchmark]: Witness Printer took 41.63 ms. Allocated memory is still 81.8 MB. Free memory was 35.8 MB in the beginning and 33.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:35,569 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 65.0 MB. Free memory was 47.1 MB in the beginning and 47.1 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 138.65 ms. Allocated memory is still 65.0 MB. Free memory was 45.5 MB in the beginning and 49.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.15 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 48.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.18 ms. Allocated memory is still 65.0 MB. Free memory was 48.2 MB in the beginning and 47.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.28 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 34.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1409.85 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 34.0 MB in the beginning and 35.8 MB in the end (delta: -1.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * Witness Printer took 41.63 ms. Allocated memory is still 81.8 MB. Free memory was 35.8 MB in the beginning and 33.7 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 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i