./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/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 3c9bb1d53c2739069062f850cb8bf82140406b77 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-635dfa2 [2018-12-02 05:14:34,471 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 05:14:34,472 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 05:14:34,481 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 05:14:34,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 05:14:34,481 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 05:14:34,482 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 05:14:34,483 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 05:14:34,485 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 05:14:34,485 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 05:14:34,486 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 05:14:34,486 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 05:14:34,487 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 05:14:34,487 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 05:14:34,488 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 05:14:34,489 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 05:14:34,489 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 05:14:34,491 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 05:14:34,492 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 05:14:34,493 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 05:14:34,494 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 05:14:34,495 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 05:14:34,496 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 05:14:34,496 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 05:14:34,497 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 05:14:34,497 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 05:14:34,498 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 05:14:34,498 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 05:14:34,499 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 05:14:34,500 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 05:14:34,500 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 05:14:34,501 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 05:14:34,501 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 05:14:34,501 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 05:14:34,502 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 05:14:34,502 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 05:14:34,502 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 05:14:34,513 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 05:14:34,513 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 05:14:34,514 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 05:14:34,514 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 05:14:34,514 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 05:14:34,514 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 05:14:34,514 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 05:14:34,514 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 05:14:34,515 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 05:14:34,515 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 05:14:34,515 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 05:14:34,515 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 05:14:34,515 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 05:14:34,516 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 05:14:34,516 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 05:14:34,517 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 05:14:34,517 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 05:14:34,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 05:14:34,518 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 05:14:34,518 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_8909baa2-6c61-4509-9d5c-b3259c2a25d3/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 -> 3c9bb1d53c2739069062f850cb8bf82140406b77 [2018-12-02 05:14:34,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 05:14:34,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 05:14:34,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 05:14:34,553 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 05:14:34,553 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 05:14:34,553 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/splice_false-unreach-call_false-valid-memcleanup.i [2018-12-02 05:14:34,589 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/data/1d753d877/d3aefe0b99524ad788e14ff42f66ae77/FLAG61752a26a [2018-12-02 05:14:35,026 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 05:14:35,026 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/sv-benchmarks/c/list-properties/splice_false-unreach-call_false-valid-memcleanup.i [2018-12-02 05:14:35,032 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/data/1d753d877/d3aefe0b99524ad788e14ff42f66ae77/FLAG61752a26a [2018-12-02 05:14:35,039 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/data/1d753d877/d3aefe0b99524ad788e14ff42f66ae77 [2018-12-02 05:14:35,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 05:14:35,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 05:14:35,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 05:14:35,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 05:14:35,044 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 05:14:35,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7300e139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35, skipping insertion in model container [2018-12-02 05:14:35,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 05:14:35,069 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 05:14:35,210 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:14:35,248 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 05:14:35,272 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:14:35,292 INFO L195 MainTranslator]: Completed translation [2018-12-02 05:14:35,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35 WrapperNode [2018-12-02 05:14:35,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 05:14:35,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 05:14:35,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 05:14:35,293 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 05:14:35,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 05:14:35,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 05:14:35,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 05:14:35,311 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 05:14:35,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... [2018-12-02 05:14:35,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 05:14:35,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 05:14:35,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 05:14:35,330 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 05:14:35,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/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 [2018-12-02 05:14:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-02 05:14:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-02 05:14:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 05:14:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 05:14:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 05:14:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 05:14:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 05:14:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 05:14:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 05:14:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 05:14:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 05:14:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 05:14:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 05:14:35,514 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 05:14:35,514 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-02 05:14:35,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:14:35 BoogieIcfgContainer [2018-12-02 05:14:35,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 05:14:35,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 05:14:35,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 05:14:35,518 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 05:14:35,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:14:35" (1/3) ... [2018-12-02 05:14:35,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0f9b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:14:35, skipping insertion in model container [2018-12-02 05:14:35,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:35" (2/3) ... [2018-12-02 05:14:35,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0f9b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:14:35, skipping insertion in model container [2018-12-02 05:14:35,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:14:35" (3/3) ... [2018-12-02 05:14:35,521 INFO L112 eAbstractionObserver]: Analyzing ICFG splice_false-unreach-call_false-valid-memcleanup.i [2018-12-02 05:14:35,530 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 05:14:35,535 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 05:14:35,550 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 05:14:35,574 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 05:14:35,574 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 05:14:35,575 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 05:14:35,575 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 05:14:35,575 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 05:14:35,575 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 05:14:35,575 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 05:14:35,575 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 05:14:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-12-02 05:14:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 05:14:35,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:35,591 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:14:35,592 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:35,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1784132366, now seen corresponding path program 1 times [2018-12-02 05:14:35,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:35,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:35,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,627 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:14:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:14:35,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:14:35,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 05:14:35,672 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:14:35,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 05:14:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 05:14:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 05:14:35,684 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-12-02 05:14:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:14:35,696 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2018-12-02 05:14:35,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 05:14:35,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-12-02 05:14:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:14:35,701 INFO L225 Difference]: With dead ends: 54 [2018-12-02 05:14:35,701 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 05:14:35,703 INFO L631 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 [2018-12-02 05:14:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 05:14:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-02 05:14:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 05:14:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2018-12-02 05:14:35,724 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2018-12-02 05:14:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:14:35,724 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2018-12-02 05:14:35,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 05:14:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2018-12-02 05:14:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 05:14:35,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:35,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:14:35,725 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:35,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash 845198504, now seen corresponding path program 1 times [2018-12-02 05:14:35,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:35,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:35,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,726 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:14:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:14:35,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:14:35,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 05:14:35,791 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:14:35,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 05:14:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 05:14:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 05:14:35,793 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 4 states. [2018-12-02 05:14:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:14:35,831 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2018-12-02 05:14:35,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 05:14:35,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-02 05:14:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:14:35,832 INFO L225 Difference]: With dead ends: 44 [2018-12-02 05:14:35,832 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 05:14:35,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:14:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 05:14:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-12-02 05:14:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 05:14:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2018-12-02 05:14:35,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2018-12-02 05:14:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:14:35,837 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2018-12-02 05:14:35,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 05:14:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2018-12-02 05:14:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-02 05:14:35,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:35,837 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:14:35,838 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:35,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:35,838 INFO L82 PathProgramCache]: Analyzing trace with hash 485268733, now seen corresponding path program 1 times [2018-12-02 05:14:35,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:35,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:35,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,839 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:14:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:14:35,876 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:14:35,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 05:14:35,876 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:14:35,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 05:14:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 05:14:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 05:14:35,876 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2018-12-02 05:14:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:14:35,908 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2018-12-02 05:14:35,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 05:14:35,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-12-02 05:14:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:14:35,910 INFO L225 Difference]: With dead ends: 51 [2018-12-02 05:14:35,910 INFO L226 Difference]: Without dead ends: 43 [2018-12-02 05:14:35,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:14:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-02 05:14:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-12-02 05:14:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-02 05:14:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2018-12-02 05:14:35,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2018-12-02 05:14:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:14:35,914 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2018-12-02 05:14:35,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 05:14:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2018-12-02 05:14:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-02 05:14:35,915 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:35,915 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:14:35,915 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:35,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1226848419, now seen corresponding path program 1 times [2018-12-02 05:14:35,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:35,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:35,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:35,916 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:14:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 05:14:35,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:14:35,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 05:14:35,957 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:14:35,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 05:14:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 05:14:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-02 05:14:35,957 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 6 states. [2018-12-02 05:14:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:14:36,034 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2018-12-02 05:14:36,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 05:14:36,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-02 05:14:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:14:36,035 INFO L225 Difference]: With dead ends: 74 [2018-12-02 05:14:36,035 INFO L226 Difference]: Without dead ends: 47 [2018-12-02 05:14:36,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-12-02 05:14:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-02 05:14:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-12-02 05:14:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-02 05:14:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2018-12-02 05:14:36,040 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2018-12-02 05:14:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:14:36,041 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2018-12-02 05:14:36,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 05:14:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2018-12-02 05:14:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 05:14:36,041 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:36,042 INFO L402 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] [2018-12-02 05:14:36,042 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:36,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 837918164, now seen corresponding path program 1 times [2018-12-02 05:14:36,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:36,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:36,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:36,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:36,043 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:14:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 05:14:36,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:14:36,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 05:14:36,068 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:14:36,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 05:14:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 05:14:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:14:36,069 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2018-12-02 05:14:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:14:36,078 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2018-12-02 05:14:36,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 05:14:36,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-12-02 05:14:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:14:36,079 INFO L225 Difference]: With dead ends: 90 [2018-12-02 05:14:36,079 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 05:14:36,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 05:14:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 05:14:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2018-12-02 05:14:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-02 05:14:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2018-12-02 05:14:36,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2018-12-02 05:14:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:14:36,083 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2018-12-02 05:14:36,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 05:14:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2018-12-02 05:14:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 05:14:36,083 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:14:36,083 INFO L402 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] [2018-12-02 05:14:36,083 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:14:36,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:14:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1868701230, now seen corresponding path program 1 times [2018-12-02 05:14:36,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:14:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:36,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:14:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:14:36,084 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:14:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 05:14:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 05:14:36,131 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 05:14:36,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:14:36 BoogieIcfgContainer [2018-12-02 05:14:36,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 05:14:36,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 05:14:36,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 05:14:36,159 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 05:14:36,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:14:35" (3/4) ... [2018-12-02 05:14:36,160 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 05:14:36,194 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8909baa2-6c61-4509-9d5c-b3259c2a25d3/bin-2019/utaipan/witness.graphml [2018-12-02 05:14:36,194 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 05:14:36,195 INFO L168 Benchmark]: Toolchain (without parser) took 1153.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 952.4 MB in the beginning and 996.0 MB in the end (delta: -43.6 MB). Peak memory consumption was 94.8 MB. Max. memory is 11.5 GB. [2018-12-02 05:14:36,196 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:14:36,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -170.2 MB). Peak memory consumption was 30.0 MB. Max. memory is 11.5 GB. [2018-12-02 05:14:36,196 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.03 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. [2018-12-02 05:14:36,196 INFO L168 Benchmark]: Boogie Preprocessor took 18.76 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. [2018-12-02 05:14:36,196 INFO L168 Benchmark]: RCFGBuilder took 185.01 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: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2018-12-02 05:14:36,197 INFO L168 Benchmark]: TraceAbstraction took 642.93 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: 94.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 11.5 GB. [2018-12-02 05:14:36,197 INFO L168 Benchmark]: Witness Printer took 35.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2018-12-02 05:14:36,198 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 250.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -170.2 MB). Peak memory consumption was 30.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.03 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 18.76 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. * RCFGBuilder took 185.01 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: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 642.93 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: 94.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 11.5 GB. * Witness Printer took 35.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 679]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = 1; [L628] List a = (List) malloc(sizeof(struct node)); VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}] [L629] COND FALSE !(a == 0) VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}] [L630] List t; [L631] List l1; [L632] List l2; [L633] List b; [L634] List u; [L635] List p = a; VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}, p={14:0}] [L636] COND TRUE __VERIFIER_nondet_int() [L637] COND TRUE \read(flag) [L638] p->h = 1 [L639] flag = 0 VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={14:0}, p={14:0}] [L644] t = (List) malloc(sizeof(struct node)) VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, t={17:0}] [L645] COND FALSE !(t == 0) VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, t={17:0}] [L646] p->n = t [L647] EXPR p->n [L647] p = p->n [L636] COND FALSE !(__VERIFIER_nondet_int()) [L649] p->h = 3 [L650] EXPR a->h VAL [a={14:0}, a->h=1, flag=0, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={17:0}, t={17:0}] [L650] COND FALSE !(a->h == 3) [L651] flag = 1 [L652] l1 = 0 [L653] l2 = 0 [L654] p = a VAL [a={14:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, t={17:0}] [L655] EXPR p->h VAL [a={14:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, p->h=1, t={17:0}] [L655] COND TRUE p->h != 3 [L656] t = p [L657] EXPR p->n [L657] p = p->n [L658] COND TRUE \read(flag) [L659] t->n = l1 [L660] l1 = t [L661] flag = 0 VAL [a={14:0}, flag=0, l1={14:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={17:0}, t={14:0}] [L655] EXPR p->h VAL [a={14:0}, flag=0, l1={14:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={17:0}, p->h=3, t={14:0}] [L655] COND FALSE !(p->h != 3) [L668] p = l1 VAL [a={14:0}, flag=0, l1={14:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, t={14:0}] [L669] COND TRUE p != 0 [L670] EXPR p->h VAL [a={14:0}, flag=0, l1={14:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, p->h=1, t={14:0}] [L670] COND TRUE p->h != 2 [L679] __VERIFIER_error() VAL [a={14:0}, flag=0, l1={14:0}, l2={0:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={17:0}, p={14:0}, t={14:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 1 error locations. UNSAFE Result, 0.5s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 44 SDslu, 193 SDs, 0 SdLazy, 105 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 3943 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...