./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/nec11.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 5edcfc0376a9e6be0c706a9b358eb1360b076159 .................................................................................................................................................................................................................................................................................... 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-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:33:40,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:33:40,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:33:40,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:33:40,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:33:40,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:33:40,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:33:40,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:33:40,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:33:40,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:33:40,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:33:40,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:33:40,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:33:40,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:33:40,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:33:40,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:33:40,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:33:40,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:33:40,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:33:40,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:33:40,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:33:40,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:33:40,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:33:40,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:33:40,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:33:40,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:33:40,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:33:40,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:33:40,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:33:40,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:33:40,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:33:40,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:33:40,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:33:40,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:33:40,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:33:40,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:33:40,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:33:40,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:33:40,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:33:40,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:33:40,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:33:40,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:33:40,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:33:40,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:33:40,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:33:40,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:33:40,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:33:40,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:33:40,230 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:33:40,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:33:40,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:33:40,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:33:40,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:33:40,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:33:40,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:33:40,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:33:40,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:33:40,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:33:40,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:33:40,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:33:40,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:33:40,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:33:40,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:33:40,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:33:40,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:33:40,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:33:40,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:33:40,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:33:40,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:33:40,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:33:40,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:33:40,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:33:40,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5edcfc0376a9e6be0c706a9b358eb1360b076159 [2021-08-29 10:33:40,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:33:40,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:33:40,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:33:40,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:33:40,543 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:33:40,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec11.c [2021-08-29 10:33:40,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e6203d0/38f84e96f610477b901c37dfa039ebad/FLAG83be6f4b7 [2021-08-29 10:33:41,050 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:33:41,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c [2021-08-29 10:33:41,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e6203d0/38f84e96f610477b901c37dfa039ebad/FLAG83be6f4b7 [2021-08-29 10:33:41,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e6203d0/38f84e96f610477b901c37dfa039ebad [2021-08-29 10:33:41,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:33:41,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:33:41,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:33:41,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:33:41,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:33:41,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ec517a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41, skipping insertion in model container [2021-08-29 10:33:41,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:33:41,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:33:41,604 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/nec11.c[317,330] [2021-08-29 10:33:41,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:33:41,619 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:33:41,628 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/nec11.c[317,330] [2021-08-29 10:33:41,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:33:41,641 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:33:41,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41 WrapperNode [2021-08-29 10:33:41,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:33:41,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:33:41,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:33:41,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:33:41,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:33:41,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:33:41,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:33:41,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:33:41,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:33:41,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:33:41,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:33:41,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:33:41,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (1/1) ... [2021-08-29 10:33:41,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:33:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:33:41,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:33:41,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:33:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:33:41,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:33:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:33:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:33:41,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:33:41,935 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 10:33:41,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:33:41 BoogieIcfgContainer [2021-08-29 10:33:41,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:33:41,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:33:41,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:33:41,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:33:41,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:33:41" (1/3) ... [2021-08-29 10:33:41,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9229e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:33:41, skipping insertion in model container [2021-08-29 10:33:41,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:33:41" (2/3) ... [2021-08-29 10:33:41,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9229e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:33:41, skipping insertion in model container [2021-08-29 10:33:41,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:33:41" (3/3) ... [2021-08-29 10:33:41,948 INFO L111 eAbstractionObserver]: Analyzing ICFG nec11.c [2021-08-29 10:33:41,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:33:41,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:33:42,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:33:42,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:33:42,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:33:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:33:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:33:42,027 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:33:42,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:33:42,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:33:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:33:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-08-29 10:33:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:33:42,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550253549] [2021-08-29 10:33:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:33:42,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:33:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:33:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:33:42,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:33:42,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550253549] [2021-08-29 10:33:42,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550253549] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:33:42,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:33:42,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 10:33:42,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103043550] [2021-08-29 10:33:42,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 10:33:42,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:33:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 10:33:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:33:42,253 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-08-29 10:33:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:33:42,314 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-29 10:33:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 10:33:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-08-29 10:33:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:33:42,332 INFO L225 Difference]: With dead ends: 21 [2021-08-29 10:33:42,332 INFO L226 Difference]: Without dead ends: 9 [2021-08-29 10:33:42,334 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:33:42,336 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.60ms IncrementalHoareTripleChecker+Time [2021-08-29 10:33:42,337 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 48.60ms Time] [2021-08-29 10:33:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-29 10:33:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-29 10:33:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:33:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-29 10:33:42,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-29 10:33:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:33:42,382 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-29 10:33:42,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-08-29 10:33:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-29 10:33:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:33:42,383 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:33:42,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:33:42,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:33:42,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:33:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:33:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-08-29 10:33:42,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:33:42,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891999134] [2021-08-29 10:33:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:33:42,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:33:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:33:42,418 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 10:33:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:33:42,468 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 10:33:42,469 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 10:33:42,470 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:33:42,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:33:42,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:33:42,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:33:42 BoogieIcfgContainer [2021-08-29 10:33:42,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:33:42,504 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:33:42,504 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:33:42,504 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:33:42,505 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:33:41" (3/4) ... [2021-08-29 10:33:42,506 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 10:33:42,541 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:33:42,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:33:42,542 INFO L158 Benchmark]: Toolchain (without parser) took 1076.76ms. Allocated memory is still 67.1MB. Free memory was 47.4MB in the beginning and 35.4MB in the end (delta: 12.0MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-08-29 10:33:42,544 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory was 47.9MB in the beginning and 47.8MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:33:42,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.43ms. Allocated memory is still 67.1MB. Free memory was 47.2MB in the beginning and 37.8MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:33:42,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.86ms. Allocated memory is still 67.1MB. Free memory was 37.7MB in the beginning and 50.6MB in the end (delta: -12.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:33:42,546 INFO L158 Benchmark]: Boogie Preprocessor took 15.55ms. Allocated memory is still 67.1MB. Free memory was 50.6MB in the beginning and 49.7MB in the end (delta: 913.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:33:42,548 INFO L158 Benchmark]: RCFGBuilder took 214.02ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 41.6MB in the end (delta: 8.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:33:42,548 INFO L158 Benchmark]: TraceAbstraction took 563.84ms. Allocated memory is still 67.1MB. Free memory was 41.0MB in the beginning and 37.0MB in the end (delta: 3.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-08-29 10:33:42,548 INFO L158 Benchmark]: Witness Printer took 37.82ms. Allocated memory is still 67.1MB. Free memory was 37.0MB in the beginning and 35.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:33:42,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 67.1MB. Free memory was 47.9MB in the beginning and 47.8MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.43ms. Allocated memory is still 67.1MB. Free memory was 47.2MB in the beginning and 37.8MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.86ms. Allocated memory is still 67.1MB. Free memory was 37.7MB in the beginning and 50.6MB in the end (delta: -12.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.55ms. Allocated memory is still 67.1MB. Free memory was 50.6MB in the beginning and 49.7MB in the end (delta: 913.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 214.02ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 41.6MB in the end (delta: 8.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 563.84ms. Allocated memory is still 67.1MB. Free memory was 41.0MB in the beginning and 37.0MB in the end (delta: 3.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Witness Printer took 37.82ms. Allocated memory is still 67.1MB. Free memory was 37.0MB in the beginning and 35.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; [L21] COND FALSE !(\read(c)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 477.66ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.63ms, AutomataDifference: 127.57ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 9.87ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 48.60ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 19.34ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 14 mSolverCounterSat, 1.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 16.33ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.21ms SsaConstructionTime, 44.63ms SatisfiabilityAnalysisTime, 75.37ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2021-08-29 10:33:42,591 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...