./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adee0aad8018029b1a093d0ddfc0de44abfd0e03 ......................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:19:29,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:19:29,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:19:29,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:19:29,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:19:29,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:19:29,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:19:29,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:19:29,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:19:29,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:19:29,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:19:29,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:19:29,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:19:29,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:19:29,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:19:29,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:19:29,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:19:29,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:19:29,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:19:29,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:19:29,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:19:29,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:19:29,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:19:29,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:19:29,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:19:29,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:19:29,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:19:29,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:19:29,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:19:29,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:19:29,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:19:29,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:19:29,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:19:29,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:19:29,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:19:29,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:19:29,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:19:29,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:19:29,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:19:29,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:19:29,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:19:29,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:19:29,646 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:19:29,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:19:29,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:19:29,653 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:19:29,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:19:29,653 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:19:29,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:19:29,653 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:19:29,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:19:29,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:19:29,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:19:29,654 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:19:29,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:19:29,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:19:29,655 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:19:29,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:19:29,655 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:19:29,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:19:29,657 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:19:29,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:19:29,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:19:29,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:19:29,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:19:29,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:19:29,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:19:29,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:19:29,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:19:29,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:19:29,659 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:19:29,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:19:29,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:19:29,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:19:29,659 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a801178b-f04d-446e-b619-3ba60d65c716/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(__VERIFIER_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 -> adee0aad8018029b1a093d0ddfc0de44abfd0e03 [2019-11-26 02:19:29,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:19:29,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:19:29,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:19:29,817 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:19:29,818 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:19:29,818 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2019-11-26 02:19:29,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/data/ab53962ab/fcb00876adbc45f3ab898a1662b210a2/FLAG751cbbe33 [2019-11-26 02:19:30,354 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:19:30,357 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2019-11-26 02:19:30,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/data/ab53962ab/fcb00876adbc45f3ab898a1662b210a2/FLAG751cbbe33 [2019-11-26 02:19:30,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/data/ab53962ab/fcb00876adbc45f3ab898a1662b210a2 [2019-11-26 02:19:30,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:19:30,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:19:30,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:30,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:19:30,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:19:30,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:30" (1/1) ... [2019-11-26 02:19:30,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b873474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:30, skipping insertion in model container [2019-11-26 02:19:30,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:30" (1/1) ... [2019-11-26 02:19:30,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:19:30,708 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:19:31,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:31,055 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:19:31,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:31,151 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:19:31,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31 WrapperNode [2019-11-26 02:19:31,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:31,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:31,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:19:31,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:19:31,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:31,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:19:31,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:19:31,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:19:31,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... [2019-11-26 02:19:31,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:19:31,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:19:31,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:19:31,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:19:31,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/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 [2019-11-26 02:19:31,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:19:31,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:19:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:19:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:19:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:19:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:19:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:19:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:19:31,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:19:31,758 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-26 02:19:31,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:31 BoogieIcfgContainer [2019-11-26 02:19:31,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:19:31,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:19:31,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:19:31,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:19:31,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:19:30" (1/3) ... [2019-11-26 02:19:31,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1553abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:31, skipping insertion in model container [2019-11-26 02:19:31,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:31" (2/3) ... [2019-11-26 02:19:31,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1553abbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:31, skipping insertion in model container [2019-11-26 02:19:31,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:31" (3/3) ... [2019-11-26 02:19:31,766 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-2.i [2019-11-26 02:19:31,773 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:19:31,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:19:31,785 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:19:31,806 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:19:31,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:19:31,806 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:19:31,806 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:19:31,806 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:19:31,806 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:19:31,806 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:19:31,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:19:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-26 02:19:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:19:31,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:31,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:31,827 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1578730623, now seen corresponding path program 1 times [2019-11-26 02:19:31,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:31,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680251112] [2019-11-26 02:19:31,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:31,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680251112] [2019-11-26 02:19:31,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:31,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:19:31,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943528998] [2019-11-26 02:19:31,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:19:31,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:19:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:19:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:19:31,976 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-26 02:19:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:31,989 INFO L93 Difference]: Finished difference Result 38 states and 59 transitions. [2019-11-26 02:19:31,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:19:31,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-26 02:19:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:31,998 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:19:31,998 INFO L226 Difference]: Without dead ends: 18 [2019-11-26 02:19:32,001 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 [2019-11-26 02:19:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-26 02:19:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-26 02:19:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-26 02:19:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-26 02:19:32,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2019-11-26 02:19:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:32,031 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-26 02:19:32,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:19:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-26 02:19:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:19:32,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:32,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:32,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:32,033 INFO L82 PathProgramCache]: Analyzing trace with hash -725012791, now seen corresponding path program 1 times [2019-11-26 02:19:32,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:32,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490156270] [2019-11-26 02:19:32,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:32,132 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:19:32,132 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:19:32,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:19:32 BoogieIcfgContainer [2019-11-26 02:19:32,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:19:32,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:19:32,154 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:19:32,155 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:19:32,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:31" (3/4) ... [2019-11-26 02:19:32,157 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:19:32,195 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a801178b-f04d-446e-b619-3ba60d65c716/bin/utaipan/witness.graphml [2019-11-26 02:19:32,195 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:19:32,197 INFO L168 Benchmark]: Toolchain (without parser) took 1547.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -111.8 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:32,197 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:32,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:32,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:32,199 INFO L168 Benchmark]: Boogie Preprocessor took 33.80 ms. Allocated memory is still 1.2 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. [2019-11-26 02:19:32,200 INFO L168 Benchmark]: RCFGBuilder took 523.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:32,201 INFO L168 Benchmark]: TraceAbstraction took 393.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:32,201 INFO L168 Benchmark]: Witness Printer took 40.86 ms. Allocated memory is still 1.2 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. [2019-11-26 02:19:32,204 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 503.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.80 ms. Allocated memory is still 1.2 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 523.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 393.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Witness Printer took 40.86 ms. Allocated memory is still 1.2 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1042]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L988] SLL* head = malloc(sizeof(SLL)); [L989] head->next = ((void*)0) [L990] head->data = 0 [L992] SLL* x = head; [L995] COND FALSE !(__VERIFIER_nondet_int()) [L1005] COND TRUE __VERIFIER_nondet_int() [L1006] x = malloc(sizeof(SLL)) [L1007] x->data = 1 [L1008] x->next = head [L1009] head = x [L1029] x = head [L1032] EXPR x->data [L1032] COND FALSE !(x->data != 1) [L1038] EXPR x->next [L1038] x = x->next [L1039] COND TRUE \read(*x) [L1041] EXPR x->data [L1041] COND TRUE x->data != 1 [L1042] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 26 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=21occurred 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 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...