./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 336180afe1780bd2c4e24c39131e05a2fcb6ebf1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:23:08,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:08,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:08,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:08,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:08,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:08,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:08,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:08,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:08,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:08,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:08,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:08,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:08,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:08,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:08,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:08,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:08,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:08,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:08,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:08,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:08,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:08,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:08,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:08,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:08,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:08,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:08,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:08,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:08,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:08,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:08,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:08,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:08,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:08,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:08,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:08,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:08,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:08,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:08,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:08,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:08,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:23:08,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:08,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:08,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:08,378 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:08,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:08,378 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:08,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:23:08,378 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:08,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:08,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:23:08,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:23:08,379 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:08,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:08,380 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:23:08,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:23:08,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:23:08,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:08,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:08,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:08,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:08,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:08,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:08,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:08,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:08,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:08,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:08,383 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:23:08,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:23:08,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:08,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:08,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 336180afe1780bd2c4e24c39131e05a2fcb6ebf1 [2019-10-22 11:23:08,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:08,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:08,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:08,424 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:08,424 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:08,425 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/../../sv-benchmarks/c/list-properties/splice-1.i [2019-10-22 11:23:08,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/data/af9382a3c/2b023de757ca4305a96f15920e45fb3e/FLAG5acbfbfd0 [2019-10-22 11:23:08,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:08,919 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/sv-benchmarks/c/list-properties/splice-1.i [2019-10-22 11:23:08,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/data/af9382a3c/2b023de757ca4305a96f15920e45fb3e/FLAG5acbfbfd0 [2019-10-22 11:23:09,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/data/af9382a3c/2b023de757ca4305a96f15920e45fb3e [2019-10-22 11:23:09,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:09,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:09,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:09,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:09,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:09,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b5765d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09, skipping insertion in model container [2019-10-22 11:23:09,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,240 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:09,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:09,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:09,672 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:09,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:09,757 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:09,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09 WrapperNode [2019-10-22 11:23:09,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:09,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:09,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:09,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:09,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:09,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:09,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:09,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:09,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... [2019-10-22 11:23:09,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:09,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:09,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:09,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:09,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:23:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:23:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:23:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:23:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:23:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:09,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:10,238 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:10,239 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-22 11:23:10,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:10 BoogieIcfgContainer [2019-10-22 11:23:10,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:10,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:10,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:10,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:10,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:09" (1/3) ... [2019-10-22 11:23:10,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399a533d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:10, skipping insertion in model container [2019-10-22 11:23:10,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:09" (2/3) ... [2019-10-22 11:23:10,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399a533d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:10, skipping insertion in model container [2019-10-22 11:23:10,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:10" (3/3) ... [2019-10-22 11:23:10,247 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2019-10-22 11:23:10,259 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:10,265 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:10,272 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:10,290 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:10,290 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:10,290 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:10,290 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:10,290 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:10,290 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:10,291 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:10,291 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-22 11:23:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 11:23:10,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:10,310 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:10,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -427823588, now seen corresponding path program 1 times [2019-10-22 11:23:10,325 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:10,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122343980] [2019-10-22 11:23:10,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122343980] [2019-10-22 11:23:10,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:10,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:23:10,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369673860] [2019-10-22 11:23:10,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:23:10,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:23:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:10,465 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-22 11:23:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:10,480 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2019-10-22 11:23:10,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:23:10,482 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-22 11:23:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:10,492 INFO L225 Difference]: With dead ends: 46 [2019-10-22 11:23:10,493 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:23:10,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:23:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:23:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 11:23:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:23:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-10-22 11:23:10,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2019-10-22 11:23:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:10,527 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-10-22 11:23:10,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:23:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2019-10-22 11:23:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:23:10,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:10,528 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:10,528 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1140031955, now seen corresponding path program 1 times [2019-10-22 11:23:10,529 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:10,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952696088] [2019-10-22 11:23:10,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952696088] [2019-10-22 11:23:10,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:10,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:23:10,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131105649] [2019-10-22 11:23:10,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:23:10,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:10,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:23:10,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:23:10,613 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2019-10-22 11:23:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:10,721 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2019-10-22 11:23:10,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:23:10,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 11:23:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:10,722 INFO L225 Difference]: With dead ends: 40 [2019-10-22 11:23:10,722 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:23:10,723 INFO L600 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 [2019-10-22 11:23:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:23:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-10-22 11:23:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:23:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2019-10-22 11:23:10,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 14 [2019-10-22 11:23:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:10,728 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2019-10-22 11:23:10,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:23:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2019-10-22 11:23:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 11:23:10,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:10,729 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:10,729 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash 352372424, now seen corresponding path program 1 times [2019-10-22 11:23:10,730 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:10,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436643988] [2019-10-22 11:23:10,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436643988] [2019-10-22 11:23:10,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:10,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:23:10,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414360635] [2019-10-22 11:23:10,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:23:10,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:23:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:23:10,790 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 4 states. [2019-10-22 11:23:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:10,849 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-10-22 11:23:10,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:23:10,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-22 11:23:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:10,852 INFO L225 Difference]: With dead ends: 47 [2019-10-22 11:23:10,852 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 11:23:10,852 INFO L600 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 [2019-10-22 11:23:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 11:23:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-22 11:23:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 11:23:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2019-10-22 11:23:10,859 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2019-10-22 11:23:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:10,860 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2019-10-22 11:23:10,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:23:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2019-10-22 11:23:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 11:23:10,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:10,861 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:10,862 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1051666739, now seen corresponding path program 1 times [2019-10-22 11:23:10,862 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:10,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600529417] [2019-10-22 11:23:10,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:10,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:23:10,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600529417] [2019-10-22 11:23:10,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:23:10,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 11:23:10,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163048767] [2019-10-22 11:23:10,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:23:10,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:23:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:23:10,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:23:10,963 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand 6 states. [2019-10-22 11:23:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:11,120 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2019-10-22 11:23:11,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:23:11,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-22 11:23:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:11,121 INFO L225 Difference]: With dead ends: 70 [2019-10-22 11:23:11,122 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 11:23:11,122 INFO L600 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 [2019-10-22 11:23:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 11:23:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-10-22 11:23:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 11:23:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-10-22 11:23:11,128 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2019-10-22 11:23:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:11,128 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-10-22 11:23:11,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:23:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-10-22 11:23:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:23:11,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:11,129 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:11,129 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -86042878, now seen corresponding path program 1 times [2019-10-22 11:23:11,130 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:11,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152217606] [2019-10-22 11:23:11,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:11,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:11,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:11,223 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:23:11,224 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:23:11,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:23:11 BoogieIcfgContainer [2019-10-22 11:23:11,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:23:11,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:23:11,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:23:11,260 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:23:11,261 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:10" (3/4) ... [2019-10-22 11:23:11,263 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:23:11,330 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0f8fc753-693f-4729-aed5-9980ab416c1c/bin/utaipan/witness.graphml [2019-10-22 11:23:11,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:23:11,332 INFO L168 Benchmark]: Toolchain (without parser) took 2107.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 940.9 MB in the beginning and 1.0 GB in the end (delta: -68.8 MB). Peak memory consumption was 67.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,335 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:11,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 533.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -180.3 MB). Peak memory consumption was 28.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.72 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,337 INFO L168 Benchmark]: Boogie Preprocessor took 55.17 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,337 INFO L168 Benchmark]: RCFGBuilder took 373.09 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,337 INFO L168 Benchmark]: TraceAbstraction took 1013.58 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: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,338 INFO L168 Benchmark]: Witness Printer took 75.10 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: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:11,347 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 533.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -180.3 MB). Peak memory consumption was 28.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.72 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.17 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 373.09 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1013.58 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: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 11.5 GB. * Witness Printer took 75.10 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: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 26 SDslu, 130 SDs, 0 SdLazy, 107 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 2135 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...