./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc ............................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 17:46:50,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:46:50,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:46:50,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:46:50,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:46:50,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:46:50,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:46:50,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:46:50,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:46:50,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:46:50,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:46:50,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:46:50,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:46:50,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:46:50,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:46:50,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:46:50,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:46:50,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:46:50,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:46:50,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:46:50,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:46:50,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:46:50,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:46:50,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:46:50,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:46:50,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:46:50,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:46:50,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:46:50,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:46:50,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:46:50,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:46:50,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:46:50,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:46:50,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:46:50,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:46:50,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:46:50,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:46:50,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:46:50,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:46:50,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:46:50,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:46:50,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:46:50,106 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:46:50,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:46:50,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:46:50,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:46:50,107 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:46:50,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:46:50,107 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:46:50,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:46:50,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:46:50,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:46:50,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:46:50,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:46:50,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:46:50,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:46:50,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:46:50,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:46:50,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer 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(__VERIFIER_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 -> 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc [2019-12-07 17:46:50,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:46:50,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:46:50,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:46:50,226 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:46:50,226 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:46:50,227 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/../../sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-12-07 17:46:50,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/data/c8f6d799a/d5b526d40a514c6ebc31312c4901a78d/FLAGb09832a7e [2019-12-07 17:46:50,640 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:46:50,640 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-12-07 17:46:50,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/data/c8f6d799a/d5b526d40a514c6ebc31312c4901a78d/FLAGb09832a7e [2019-12-07 17:46:50,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/data/c8f6d799a/d5b526d40a514c6ebc31312c4901a78d [2019-12-07 17:46:50,658 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:46:50,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:46:50,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:46:50,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:46:50,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:46:50,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e60119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50, skipping insertion in model container [2019-12-07 17:46:50,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:46:50,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:46:50,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:46:50,897 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:46:50,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:46:50,956 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:46:50,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50 WrapperNode [2019-12-07 17:46:50,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:46:50,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:46:50,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:46:50,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:46:50,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:46:50,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:46:50,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:46:50,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:46:50,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:50,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:51,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:51,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:51,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... [2019-12-07 17:46:51,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:46:51,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:46:51,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:46:51,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:46:51,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/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 [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 17:46:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:46:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:46:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:46:51,265 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:46:51,265 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 17:46:51,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:46:51 BoogieIcfgContainer [2019-12-07 17:46:51,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:46:51,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:46:51,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:46:51,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:46:51,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:46:50" (1/3) ... [2019-12-07 17:46:51,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9aefe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:46:51, skipping insertion in model container [2019-12-07 17:46:51,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:46:50" (2/3) ... [2019-12-07 17:46:51,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9aefe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:46:51, skipping insertion in model container [2019-12-07 17:46:51,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:46:51" (3/3) ... [2019-12-07 17:46:51,270 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2019-12-07 17:46:51,276 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:46:51,281 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:46:51,288 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:46:51,303 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:46:51,303 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:46:51,303 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:46:51,303 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:46:51,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:46:51,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:46:51,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:46:51,303 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:46:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-12-07 17:46:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 17:46:51,316 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:46:51,317 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:46:51,317 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:46:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:46:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1853593862, now seen corresponding path program 1 times [2019-12-07 17:46:51,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:46:51,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148118611] [2019-12-07 17:46:51,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:46:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:46:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:46:51,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148118611] [2019-12-07 17:46:51,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:46:51,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:46:51,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243861874] [2019-12-07 17:46:51,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:46:51,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:46:51,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:46:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:46:51,438 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-12-07 17:46:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:46:51,450 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-12-07 17:46:51,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:46:51,451 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-12-07 17:46:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:46:51,457 INFO L225 Difference]: With dead ends: 43 [2019-12-07 17:46:51,457 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 17:46:51,459 INFO L630 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 [2019-12-07 17:46:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 17:46:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-12-07 17:46:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 17:46:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-12-07 17:46:51,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2019-12-07 17:46:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:46:51,481 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-12-07 17:46:51,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:46:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-12-07 17:46:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:46:51,482 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:46:51,482 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:46:51,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:46:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:46:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2143092324, now seen corresponding path program 1 times [2019-12-07 17:46:51,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:46:51,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408855417] [2019-12-07 17:46:51,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:46:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:46:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:46:51,544 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:46:51,544 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:46:51,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:46:51 BoogieIcfgContainer [2019-12-07 17:46:51,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:46:51,562 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:46:51,562 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:46:51,562 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:46:51,562 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:46:51" (3/4) ... [2019-12-07 17:46:51,564 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:46:51,592 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1357b9e6-271e-4a17-9253-c03901bd3bfd/bin/uautomizer/witness.graphml [2019-12-07 17:46:51,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:46:51,593 INFO L168 Benchmark]: Toolchain (without parser) took 933.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 939.4 MB in the beginning and 1.0 GB in the end (delta: -84.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,593 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:46:51,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -150.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:46:51,595 INFO L168 Benchmark]: Boogie Preprocessor took 21.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,595 INFO L168 Benchmark]: RCFGBuilder took 256.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,595 INFO L168 Benchmark]: TraceAbstraction took 295.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,596 INFO L168 Benchmark]: Witness Printer took 29.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:46:51,598 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -150.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 256.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 295.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 29.74 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 996]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = ((void*)0) [L987] COND TRUE __VERIFIER_nondet_int() [L987] head->data = 2 [L987] head->opt = malloc(sizeof(SLL)) [L987] EXPR head->opt [L987] head->opt->next = ((void*)0) [L988] SLL* x = head; [L990] COND FALSE !(__VERIFIER_nondet_int()) [L993] x = head [L994] COND TRUE x != ((void*)0) [L996] EXPR x->data [L996] EXPR x->data == 2 && x->opt == x [L996] EXPR x->opt [L996] EXPR x->data == 2 && x->opt == x [L996] COND TRUE !(x->data == 2 && x->opt == x) [L996] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 34 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=26occurred 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, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...