./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/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 1d36d9c90d70f68ab71543f184cd64aeaf02e524 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-5842f4b [2018-11-18 12:14:10,022 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:14:10,023 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:14:10,031 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:14:10,032 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:14:10,032 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:14:10,033 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:14:10,034 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:14:10,036 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:14:10,036 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:14:10,037 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:14:10,037 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:14:10,038 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:14:10,038 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:14:10,039 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:14:10,040 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:14:10,041 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:14:10,042 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:14:10,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:14:10,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:14:10,045 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:14:10,046 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:14:10,048 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:14:10,048 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:14:10,048 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:14:10,049 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:14:10,050 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:14:10,050 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:14:10,051 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:14:10,051 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:14:10,052 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:14:10,052 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:14:10,052 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:14:10,052 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:14:10,053 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:14:10,053 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:14:10,054 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 12:14:10,068 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:14:10,069 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:14:10,070 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:14:10,070 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 12:14:10,070 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 12:14:10,071 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 12:14:10,071 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 12:14:10,071 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 12:14:10,071 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 12:14:10,071 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 12:14:10,072 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 12:14:10,072 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 12:14:10,072 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 12:14:10,073 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:14:10,073 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:14:10,074 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:14:10,074 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:14:10,075 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:14:10,075 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 12:14:10,076 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:14:10,076 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:14:10,076 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 12:14:10,076 INFO L133 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/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/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 -> 1d36d9c90d70f68ab71543f184cd64aeaf02e524 [2018-11-18 12:14:10,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:14:10,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:14:10,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:14:10,121 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:14:10,121 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:14:10,122 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-11-18 12:14:10,172 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/data/613870d7b/78fc876219fc493f8c142c07ada54b8c/FLAGd3fadba51 [2018-11-18 12:14:10,636 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:14:10,636 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-11-18 12:14:10,647 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/data/613870d7b/78fc876219fc493f8c142c07ada54b8c/FLAGd3fadba51 [2018-11-18 12:14:11,144 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/data/613870d7b/78fc876219fc493f8c142c07ada54b8c [2018-11-18 12:14:11,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:14:11,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 12:14:11,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:14:11,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:14:11,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:14:11,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ae9f381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11, skipping insertion in model container [2018-11-18 12:14:11,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:14:11,238 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:14:11,591 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:14:11,599 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:14:11,647 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:14:11,785 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:14:11,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11 WrapperNode [2018-11-18 12:14:11,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:14:11,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 12:14:11,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 12:14:11,787 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 12:14:11,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 12:14:11,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:14:11,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:14:11,820 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:14:11,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... [2018-11-18 12:14:11,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:14:11,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:14:11,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:14:11,862 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:14:11,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/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 [2018-11-18 12:14:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2018-11-18 12:14:11,917 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2018-11-18 12:14:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 12:14:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2018-11-18 12:14:11,917 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2018-11-18 12:14:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-18 12:14:11,917 INFO L138 BoogieDeclarations]: Found implementation of procedure exit [2018-11-18 12:14:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2018-11-18 12:14:11,918 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2018-11-18 12:14:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:14:11,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:14:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:14:11,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:14:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 12:14:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 12:14:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 12:14:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:14:11,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:14:12,357 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:14:12,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:12 BoogieIcfgContainer [2018-11-18 12:14:12,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:14:12,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:14:12,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:14:12,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:14:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:14:11" (1/3) ... [2018-11-18 12:14:12,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50dab38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:14:12, skipping insertion in model container [2018-11-18 12:14:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:14:11" (2/3) ... [2018-11-18 12:14:12,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50dab38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:14:12, skipping insertion in model container [2018-11-18 12:14:12,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:12" (3/3) ... [2018-11-18 12:14:12,363 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-11-18 12:14:12,372 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:14:12,379 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:14:12,392 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:14:12,417 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:14:12,417 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:14:12,417 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:14:12,417 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:14:12,417 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:14:12,417 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:14:12,417 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:14:12,418 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:14:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-11-18 12:14:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 12:14:12,435 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:12,435 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:12,439 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:12,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1968350456, now seen corresponding path program 1 times [2018-11-18 12:14:12,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:12,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:12,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:12,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:12,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:14:12,572 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:14:12,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:14:12,572 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:14:12,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 12:14:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 12:14:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:14:12,591 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2018-11-18 12:14:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:12,613 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2018-11-18 12:14:12,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 12:14:12,615 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-11-18 12:14:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:12,623 INFO L225 Difference]: With dead ends: 80 [2018-11-18 12:14:12,624 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 12:14:12,629 INFO L604 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 [2018-11-18 12:14:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 12:14:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-18 12:14:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 12:14:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-11-18 12:14:12,679 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2018-11-18 12:14:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:12,681 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-11-18 12:14:12,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 12:14:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-11-18 12:14:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 12:14:12,682 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:12,682 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:12,682 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:12,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:12,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2046027917, now seen corresponding path program 1 times [2018-11-18 12:14:12,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:12,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:12,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:12,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:12,698 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:14:12,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:14:12,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:14:12,837 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:14:12,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:14:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:14:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:14:12,840 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2018-11-18 12:14:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:13,016 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-11-18 12:14:13,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:14:13,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-11-18 12:14:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:13,018 INFO L225 Difference]: With dead ends: 50 [2018-11-18 12:14:13,018 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 12:14:13,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:14:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 12:14:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-11-18 12:14:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 12:14:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-11-18 12:14:13,024 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2018-11-18 12:14:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:13,026 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-11-18 12:14:13,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:14:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-11-18 12:14:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:14:13,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:13,027 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:13,027 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:13,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1240985643, now seen corresponding path program 1 times [2018-11-18 12:14:13,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:13,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:13,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:13,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:13,030 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:14:13,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:14:13,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-18 12:14:13,400 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:14:13,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:14:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:14:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:14:13,402 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2018-11-18 12:14:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:13,578 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2018-11-18 12:14:13,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:14:13,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-11-18 12:14:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:13,581 INFO L225 Difference]: With dead ends: 44 [2018-11-18 12:14:13,581 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 12:14:13,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:14:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 12:14:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-18 12:14:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 12:14:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-11-18 12:14:13,588 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2018-11-18 12:14:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:13,588 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-11-18 12:14:13,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:14:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-11-18 12:14:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 12:14:13,589 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:13,589 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:13,589 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:13,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -361960197, now seen corresponding path program 1 times [2018-11-18 12:14:13,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:13,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:13,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:13,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:13,591 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:13,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:13,779 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:14:13,780 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-11-18 12:14:13,781 INFO L202 CegarAbsIntRunner]: [4], [5], [21], [25], [29], [31], [37], [39], [43], [44], [48], [52], [54], [57], [63], [70], [72], [75], [80], [83], [87], [91], [93], [97], [98], [101], [102], [103], [105], [106], [107], [108] [2018-11-18 12:14:13,811 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:14:13,811 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:14:14,064 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:14:14,072 INFO L272 AbstractInterpreter]: Visited 32 different actions 61 times. Merged at 14 different actions 25 times. Never widened. Performed 394 root evaluator evaluations with a maximum evaluation depth of 3. Performed 394 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 5 fixpoints after 4 different actions. Largest state had 23 variables. [2018-11-18 12:14:14,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:14,101 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:14:14,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:14,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:14:14,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:14,116 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:14:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:14,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:14:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:14,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:14:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:14,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:14:14,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2018-11-18 12:14:14,713 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:14:14,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:14:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:14:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:14:14,729 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-11-18 12:14:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:14,890 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-11-18 12:14:14,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:14:14,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-11-18 12:14:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:14,892 INFO L225 Difference]: With dead ends: 58 [2018-11-18 12:14:14,892 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 12:14:14,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:14:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 12:14:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-18 12:14:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 12:14:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-11-18 12:14:14,897 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2018-11-18 12:14:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:14,897 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-11-18 12:14:14,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:14:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-11-18 12:14:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 12:14:14,899 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:14,899 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:14,899 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:14,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1152876989, now seen corresponding path program 2 times [2018-11-18 12:14:14,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:14,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:14,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:14:14,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:14,901 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:14:15,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:15,248 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:14:15,248 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:14:15,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:14:15,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:15,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:14:15,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:14:15,290 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:14:15,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 12:14:15,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:14:15,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:14:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:15,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:14:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:14:16,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:14:16,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2018-11-18 12:14:16,188 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:14:16,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:14:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:14:16,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:14:16,189 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 16 states. [2018-11-18 12:14:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:17,162 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2018-11-18 12:14:17,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 12:14:17,166 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2018-11-18 12:14:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:17,167 INFO L225 Difference]: With dead ends: 67 [2018-11-18 12:14:17,167 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 12:14:17,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:14:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 12:14:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-11-18 12:14:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 12:14:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-11-18 12:14:17,172 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2018-11-18 12:14:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:17,172 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-11-18 12:14:17,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:14:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-11-18 12:14:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:14:17,175 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:17,176 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:17,176 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:17,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1781986097, now seen corresponding path program 3 times [2018-11-18 12:14:17,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:17,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:17,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:14:17,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:17,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:14:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 12:14:17,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:17,486 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:14:17,486 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:14:17,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:14:17,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:14:17,487 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:14:17,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:14:17,494 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:14:17,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:14:17,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:14:17,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:14:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 12:14:17,626 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:14:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 12:14:17,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:14:17,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2018-11-18 12:14:17,776 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:14:17,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:14:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:14:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:14:17,777 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 9 states. [2018-11-18 12:14:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:14:17,973 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2018-11-18 12:14:17,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:14:17,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-11-18 12:14:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:14:17,976 INFO L225 Difference]: With dead ends: 65 [2018-11-18 12:14:17,976 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 12:14:17,977 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:14:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 12:14:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2018-11-18 12:14:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 12:14:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2018-11-18 12:14:17,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 44 [2018-11-18 12:14:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:14:17,991 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2018-11-18 12:14:17,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:14:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2018-11-18 12:14:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-18 12:14:17,993 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:14:17,993 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:14:17,994 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:14:17,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:14:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1315989847, now seen corresponding path program 4 times [2018-11-18 12:14:17,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:14:17,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:17,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:14:17,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:14:17,995 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:14:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:14:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:14:18,047 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:14:18,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:14:18 BoogieIcfgContainer [2018-11-18 12:14:18,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:14:18,076 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:14:18,076 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:14:18,076 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:14:18,077 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:14:12" (3/4) ... [2018-11-18 12:14:18,079 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 12:14:18,131 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2b309995-66b4-42a5-84b8-55f0148a8537/bin-2019/utaipan/witness.graphml [2018-11-18 12:14:18,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:14:18,132 INFO L168 Benchmark]: Toolchain (without parser) took 6983.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 958.0 MB in the beginning and 1.0 GB in the end (delta: -84.0 MB). Peak memory consumption was 50.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:18,133 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:14:18,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 635.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 958.0 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:18,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.12 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. [2018-11-18 12:14:18,134 INFO L168 Benchmark]: Boogie Preprocessor took 41.73 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. [2018-11-18 12:14:18,135 INFO L168 Benchmark]: RCFGBuilder took 495.82 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:18,135 INFO L168 Benchmark]: TraceAbstraction took 5718.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:18,135 INFO L168 Benchmark]: Witness Printer took 55.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:14:18,140 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 635.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 958.0 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.12 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 41.73 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 495.82 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5718.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. * Witness Printer took 55.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] EXPR, FCALL malloc(sizeof(struct node)) [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L570] FCALL new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L565] COND TRUE len > 0 [L566] EXPR, FCALL malloc(sizeof(struct node)) [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L570] FCALL new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L565] COND TRUE len > 0 [L566] EXPR, FCALL malloc(sizeof(struct node)) [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L570] FCALL new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L574] RET return head; VAL [\old(len)=3, \result={9:0}, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L596] EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={9:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={9:0}] [L577] int len = 0; VAL [head={9:0}, head={9:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR, FCALL head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR, FCALL head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR, FCALL head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={9:0}, head={0:0}, len=3] [L582] RET return len; VAL [\result=3, head={0:0}, head={9:0}, len=3] [L597] EXPR sll_length(s) VAL [len=2, s={9:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. UNSAFE Result, 5.6s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 193 SDtfs, 83 SDslu, 812 SDs, 0 SdLazy, 403 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 361 NumberOfCodeBlocks, 358 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 42991 SizeOfPredicates, 6 NumberOfNonLiveVariables, 442 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 70/116 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...