./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dfe6e301265e265404ce5be2c9f54235040b69e ...................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-30 02:29:24,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:29:24,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:29:24,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:29:24,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:29:24,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:29:24,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:29:24,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:29:24,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:29:24,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:29:24,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:29:24,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:29:24,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:29:24,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:29:24,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:29:24,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:29:24,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:29:24,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:29:24,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:29:24,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:29:25,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:29:25,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:29:25,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:29:25,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:29:25,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:29:25,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:29:25,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:29:25,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:29:25,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:29:25,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:29:25,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:29:25,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:29:25,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:29:25,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:29:25,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:29:25,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:29:25,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:29:25,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:29:25,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:29:25,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:29:25,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:29:25,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:29:25,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:29:25,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:29:25,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:29:25,106 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:29:25,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:29:25,107 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:29:25,107 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:29:25,107 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:29:25,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:29:25,108 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:29:25,109 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:29:25,110 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:29:25,110 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:29:25,110 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:29:25,110 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:29:25,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:29:25,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:29:25,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:29:25,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:29:25,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:29:25,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:29:25,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:29:25,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:29:25,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:29:25,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:29:25,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:29:25,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:29:25,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:29:25,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:29:25,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:29:25,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:29:25,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:29:25,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:29:25,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:29:25,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:29:25,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:29:25,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:29:25,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:29:25,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:29:25,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:29:25,119 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dfe6e301265e265404ce5be2c9f54235040b69e [2020-11-30 02:29:25,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:29:25,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:29:25,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:29:25,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:29:25,465 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:29:25,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-11-30 02:29:25,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/data/5b285b91b/635dc746382c4b21883cab7f1f0b78e4/FLAG1fdf07d60 [2020-11-30 02:29:26,339 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:29:26,340 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-11-30 02:29:26,366 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/data/5b285b91b/635dc746382c4b21883cab7f1f0b78e4/FLAG1fdf07d60 [2020-11-30 02:29:26,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/data/5b285b91b/635dc746382c4b21883cab7f1f0b78e4 [2020-11-30 02:29:26,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:29:26,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:29:26,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:26,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:29:26,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:29:26,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:26" (1/1) ... [2020-11-30 02:29:26,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6883f133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:26, skipping insertion in model container [2020-11-30 02:29:26,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:26" (1/1) ... [2020-11-30 02:29:26,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:29:26,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:29:27,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:27,102 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:29:27,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:27,265 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:29:27,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27 WrapperNode [2020-11-30 02:29:27,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:27,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:27,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:29:27,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:29:27,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:27,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:29:27,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:29:27,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:29:27,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... [2020-11-30 02:29:27,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:29:27,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:29:27,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:29:27,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:29:27,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:29:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:29:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:29:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 02:29:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 02:29:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:29:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 02:29:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:29:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:29:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:29:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:29:28,218 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:29:28,218 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-30 02:29:28,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:28 BoogieIcfgContainer [2020-11-30 02:29:28,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:29:28,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:29:28,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:29:28,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:29:28,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:29:26" (1/3) ... [2020-11-30 02:29:28,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308bf4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:28, skipping insertion in model container [2020-11-30 02:29:28,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:27" (2/3) ... [2020-11-30 02:29:28,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308bf4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:28, skipping insertion in model container [2020-11-30 02:29:28,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:28" (3/3) ... [2020-11-30 02:29:28,232 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext.i [2020-11-30 02:29:28,245 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:29:28,250 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:29:28,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:29:28,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:29:28,301 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:29:28,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:29:28,302 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:29:28,302 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:29:28,303 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:29:28,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:29:28,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:29:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 02:29:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:29:28,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:28,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:28,330 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash -313318671, now seen corresponding path program 1 times [2020-11-30 02:29:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:28,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925208496] [2020-11-30 02:29:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:28,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925208496] [2020-11-30 02:29:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:29:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037860645] [2020-11-30 02:29:28,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:29:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:29:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:29:28,536 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-30 02:29:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:28,554 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2020-11-30 02:29:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:29:28,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 02:29:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:28,564 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:29:28,565 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 02:29:28,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:29:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 02:29:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 02:29:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 02:29:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-30 02:29:28,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-30 02:29:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:28,601 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-30 02:29:28,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:29:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-30 02:29:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:28,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:28,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:28,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:29:28,602 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:28,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1064774874, now seen corresponding path program 1 times [2020-11-30 02:29:28,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:28,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069696136] [2020-11-30 02:29:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:29:28,640 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:29:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:29:28,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:29:28,716 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:29:28,716 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:29:28,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:29:28,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:29:28 BoogieIcfgContainer [2020-11-30 02:29:28,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:29:28,748 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:29:28,748 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:29:28,748 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:29:28,749 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:28" (3/4) ... [2020-11-30 02:29:28,751 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 02:29:28,794 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fd7e737b-2a7a-40ae-b4a2-4527fcfb384e/bin/utaipan/witness.graphml [2020-11-30 02:29:28,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:29:28,797 INFO L168 Benchmark]: Toolchain (without parser) took 2209.72 ms. Allocated memory is still 136.3 MB. Free memory was 106.6 MB in the beginning and 108.5 MB in the end (delta: -1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:28,797 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:28,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.91 ms. Allocated memory is still 136.3 MB. Free memory was 106.2 MB in the beginning and 100.9 MB in the end (delta: 5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.83 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 98.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,799 INFO L168 Benchmark]: Boogie Preprocessor took 32.19 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 97.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,800 INFO L168 Benchmark]: RCFGBuilder took 872.27 ms. Allocated memory is still 136.3 MB. Free memory was 97.2 MB in the beginning and 73.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,801 INFO L168 Benchmark]: TraceAbstraction took 525.02 ms. Allocated memory is still 136.3 MB. Free memory was 72.6 MB in the beginning and 110.5 MB in the end (delta: -38.0 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,801 INFO L168 Benchmark]: Witness Printer took 46.76 ms. Allocated memory is still 136.3 MB. Free memory was 110.5 MB in the beginning and 108.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:28,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 667.91 ms. Allocated memory is still 136.3 MB. Free memory was 106.2 MB in the beginning and 100.9 MB in the end (delta: 5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.83 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 98.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.19 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 97.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 872.27 ms. Allocated memory is still 136.3 MB. Free memory was 97.2 MB in the beginning and 73.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 525.02 ms. Allocated memory is still 136.3 MB. Free memory was 72.6 MB in the beginning and 110.5 MB in the end (delta: -38.0 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. * Witness Printer took 46.76 ms. Allocated memory is still 136.3 MB. Free memory was 110.5 MB in the beginning and 108.5 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: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] int i = 0; [L537] i < 30 && __VERIFIER_nondet_int() [L537] i < 30 && __VERIFIER_nondet_int() [L537] COND FALSE !(i < 30 && __VERIFIER_nondet_int()) [L545] p->h = i [L546] p->n = 0 [L547] p = a [L548] i = 0 [L549] COND TRUE p!=0 [L550] EXPR p->h [L550] COND TRUE p->h != 1 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "simple-ext.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 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! Received shutdown request...