./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/ldv-regression/test06.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 83c9fca06a756d42969949997a10968e5a1902b6 ....................................................................................................................................................................................................................................................................................................... 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.multireach-323-8d31f38 [2021-07-05 00:58:22,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 00:58:22,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 00:58:22,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 00:58:22,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 00:58:22,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 00:58:22,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 00:58:22,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 00:58:22,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 00:58:22,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 00:58:22,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 00:58:22,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 00:58:22,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 00:58:22,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 00:58:22,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 00:58:22,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 00:58:22,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 00:58:22,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 00:58:22,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 00:58:22,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 00:58:22,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 00:58:22,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 00:58:22,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 00:58:22,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 00:58:22,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 00:58:22,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 00:58:22,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 00:58:22,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 00:58:22,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 00:58:22,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 00:58:22,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 00:58:22,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 00:58:22,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 00:58:22,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 00:58:22,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 00:58:22,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 00:58:22,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 00:58:22,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 00:58:22,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 00:58:22,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 00:58:22,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 00:58:22,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 00:58:22,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 00:58:22,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 00:58:22,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 00:58:22,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 00:58:22,512 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 00:58:22,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 00:58:22,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 00:58:22,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 00:58:22,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 00:58:22,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 00:58:22,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 00:58:22,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 00:58:22,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 00:58:22,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 00:58:22,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 00:58:22,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 00:58:22,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 00:58:22,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 00:58:22,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c9fca06a756d42969949997a10968e5a1902b6 [2021-07-05 00:58:22,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 00:58:22,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 00:58:22,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 00:58:22,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 00:58:22,809 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 00:58:22,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test06.c [2021-07-05 00:58:22,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec9f4681/13604af0209a4b1c8b30e88afd74e316/FLAG21e87e7f0 [2021-07-05 00:58:23,199 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 00:58:23,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c [2021-07-05 00:58:23,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec9f4681/13604af0209a4b1c8b30e88afd74e316/FLAG21e87e7f0 [2021-07-05 00:58:23,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec9f4681/13604af0209a4b1c8b30e88afd74e316 [2021-07-05 00:58:23,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 00:58:23,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 00:58:23,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 00:58:23,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 00:58:23,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 00:58:23,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316343c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23, skipping insertion in model container [2021-07-05 00:58:23,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 00:58:23,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 00:58:23,764 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c[670,683] [2021-07-05 00:58:23,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 00:58:23,772 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 00:58:23,803 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c[670,683] [2021-07-05 00:58:23,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 00:58:23,831 INFO L208 MainTranslator]: Completed translation [2021-07-05 00:58:23,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23 WrapperNode [2021-07-05 00:58:23,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 00:58:23,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 00:58:23,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 00:58:23,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 00:58:23,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 00:58:23,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 00:58:23,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 00:58:23,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 00:58:23,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 00:58:23,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 00:58:23,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 00:58:23,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 00:58:23,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (1/1) ... [2021-07-05 00:58:23,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 00:58:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 00:58:23,930 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) [2021-07-05 00:58:23,986 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 [2021-07-05 00:58:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-05 00:58:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 00:58:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-05 00:58:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 00:58:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-05 00:58:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 00:58:24,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 00:58:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-05 00:58:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-05 00:58:24,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 00:58:24,256 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-07-05 00:58:24,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:24 BoogieIcfgContainer [2021-07-05 00:58:24,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 00:58:24,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 00:58:24,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 00:58:24,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 00:58:24,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 12:58:23" (1/3) ... [2021-07-05 00:58:24,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67da241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 12:58:24, skipping insertion in model container [2021-07-05 00:58:24,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 12:58:23" (2/3) ... [2021-07-05 00:58:24,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67da241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 12:58:24, skipping insertion in model container [2021-07-05 00:58:24,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:24" (3/3) ... [2021-07-05 00:58:24,262 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2021-07-05 00:58:24,266 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 00:58:24,266 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 00:58:24,292 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 00:58:24,297 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 00:58:24,297 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 00:58:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-05 00:58:24,308 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 00:58:24,308 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-05 00:58:24,309 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 00:58:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 00:58:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 889629865, now seen corresponding path program 1 times [2021-07-05 00:58:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 00:58:24,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435477652] [2021-07-05 00:58:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 00:58:24,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 00:58:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 00:58:24,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:24,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 00:58:24,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:24,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 00:58:24,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 00:58:24,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 00:58:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 00:58:24,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 00:58:24,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435477652] [2021-07-05 00:58:24,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435477652] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 00:58:24,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 00:58:24,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 00:58:24,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506395322] [2021-07-05 00:58:24,448 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 00:58:24,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 00:58:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 00:58:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 00:58:24,458 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 00:58:24,470 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-07-05 00:58:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 00:58:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-05 00:58:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 00:58:24,476 INFO L225 Difference]: With dead ends: 18 [2021-07-05 00:58:24,476 INFO L226 Difference]: Without dead ends: 8 [2021-07-05 00:58:24,478 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 00:58:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-07-05 00:58:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-07-05 00:58:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2021-07-05 00:58:24,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 6 [2021-07-05 00:58:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 00:58:24,496 INFO L442 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2021-07-05 00:58:24,496 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 00:58:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2021-07-05 00:58:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-05 00:58:24,496 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 00:58:24,497 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-05 00:58:24,497 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 00:58:24,497 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 00:58:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 00:58:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1804905802, now seen corresponding path program 1 times [2021-07-05 00:58:24,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 00:58:24,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105313493] [2021-07-05 00:58:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 00:58:24,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 00:58:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 00:58:24,557 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 00:58:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 00:58:24,621 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 00:58:24,650 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-05 00:58:24,651 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-05 00:58:24,653 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-05 00:58:24,654 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 00:58:24,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 12:58:24 BoogieIcfgContainer [2021-07-05 00:58:24,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 00:58:24,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 00:58:24,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 00:58:24,688 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 00:58:24,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 12:58:24" (3/4) ... [2021-07-05 00:58:24,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-05 00:58:24,727 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 00:58:24,728 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 00:58:24,729 INFO L168 Benchmark]: Toolchain (without parser) took 1079.75 ms. Allocated memory was 50.3 MB in the beginning and 83.9 MB in the end (delta: 33.6 MB). Free memory was 24.3 MB in the beginning and 56.9 MB in the end (delta: -32.6 MB). Peak memory consumption was 853.8 kB. Max. memory is 16.1 GB. [2021-07-05 00:58:24,729 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:24,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.38 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 24.1 MB in the beginning and 51.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:24,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.74 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 50.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:24,731 INFO L168 Benchmark]: Boogie Preprocessor took 36.88 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 48.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 00:58:24,731 INFO L168 Benchmark]: RCFGBuilder took 359.55 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 45.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:24,732 INFO L168 Benchmark]: TraceAbstraction took 428.12 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 45.3 MB in the beginning and 59.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:24,735 INFO L168 Benchmark]: Witness Printer took 40.87 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 56.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 00:58:24,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 180.38 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 24.1 MB in the beginning and 51.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.74 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 50.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.88 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 48.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 359.55 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 45.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 428.12 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 45.3 MB in the beginning and 59.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * Witness Printer took 40.87 ms. Allocated memory is still 83.9 MB. Free memory was 59.0 MB in the beginning and 56.9 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: 42]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) [L14] COND TRUE a == 4 [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L16] return 1; [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 364.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.3ms, AutomataDifference: 29.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 8 SDslu, 1 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.3ms SsaConstructionTime, 81.9ms SatisfiabilityAnalysisTime, 53.2ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 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! [2021-07-05 00:58:24,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...