./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/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 534681b11e8e68e6058985d885b01f2cbfa43e5b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:12:03,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:12:03,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:12:03,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:12:03,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:12:03,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:12:03,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:12:03,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:12:03,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:12:03,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:12:03,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:12:03,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:12:03,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:12:03,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:12:03,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:12:03,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:12:03,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:12:03,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:12:03,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:12:03,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:12:03,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:12:03,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:12:03,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:12:03,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:12:03,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:12:03,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:12:03,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:12:03,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:12:03,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:12:03,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:12:03,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:12:03,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:12:03,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:12:03,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:12:03,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:12:03,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:12:03,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:12:03,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:12:03,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:12:03,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:12:03,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:12:03,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 16:12:03,419 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:12:03,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:12:03,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:12:03,420 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:12:03,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:12:03,421 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:12:03,421 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:12:03,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:12:03,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:12:03,421 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:12:03,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:12:03,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:12:03,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:12:03,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:12:03,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:12:03,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:12:03,425 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/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 -> 534681b11e8e68e6058985d885b01f2cbfa43e5b [2019-12-07 16:12:03,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:12:03,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:12:03,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:12:03,538 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:12:03,538 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:12:03,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2019-12-07 16:12:03,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/data/0ebe136d3/390e16ca83e54d6791c072b9d4b0d0c0/FLAGa88e6a23c [2019-12-07 16:12:04,019 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:12:04,020 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2019-12-07 16:12:04,028 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/data/0ebe136d3/390e16ca83e54d6791c072b9d4b0d0c0/FLAGa88e6a23c [2019-12-07 16:12:04,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/data/0ebe136d3/390e16ca83e54d6791c072b9d4b0d0c0 [2019-12-07 16:12:04,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:12:04,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:12:04,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:12:04,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:12:04,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:12:04,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98acb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04, skipping insertion in model container [2019-12-07 16:12:04,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:12:04,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:12:04,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:12:04,298 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:12:04,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:12:04,365 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:12:04,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04 WrapperNode [2019-12-07 16:12:04,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:12:04,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:12:04,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:12:04,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:12:04,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:12:04,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:12:04,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:12:04,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:12:04,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... [2019-12-07 16:12:04,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:12:04,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:12:04,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:12:04,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:12:04,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/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 [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:12:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:12:04,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:12:05,083 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:12:05,083 INFO L287 CfgBuilder]: Removed 75 assume(true) statements. [2019-12-07 16:12:05,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:12:05 BoogieIcfgContainer [2019-12-07 16:12:05,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:12:05,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:12:05,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:12:05,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:12:05,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:12:04" (1/3) ... [2019-12-07 16:12:05,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b34746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:12:05, skipping insertion in model container [2019-12-07 16:12:05,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:12:04" (2/3) ... [2019-12-07 16:12:05,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b34746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:12:05, skipping insertion in model container [2019-12-07 16:12:05,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:12:05" (3/3) ... [2019-12-07 16:12:05,090 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2019-12-07 16:12:05,096 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:12:05,101 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-12-07 16:12:05,108 INFO L249 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-12-07 16:12:05,125 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:12:05,125 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:12:05,125 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:12:05,125 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:12:05,126 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:12:05,126 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:12:05,126 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:12:05,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:12:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2019-12-07 16:12:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:12:05,142 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 16:12:05,143 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 412758470, now seen corresponding path program 1 times [2019-12-07 16:12:05,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374021910] [2019-12-07 16:12:05,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:12:05,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374021910] [2019-12-07 16:12:05,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:12:05,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726646924] [2019-12-07 16:12:05,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 16:12:05,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 16:12:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 16:12:05,255 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2019-12-07 16:12:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:05,273 INFO L93 Difference]: Finished difference Result 165 states and 267 transitions. [2019-12-07 16:12:05,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 16:12:05,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 16:12:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:05,281 INFO L225 Difference]: With dead ends: 165 [2019-12-07 16:12:05,281 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 16:12:05,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 16:12:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 16:12:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-07 16:12:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-07 16:12:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2019-12-07 16:12:05,310 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 5 [2019-12-07 16:12:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:05,310 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2019-12-07 16:12:05,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 16:12:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2019-12-07 16:12:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 16:12:05,311 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 16:12:05,311 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash -109504029, now seen corresponding path program 1 times [2019-12-07 16:12:05,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051747064] [2019-12-07 16:12:05,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:12:05,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051747064] [2019-12-07 16:12:05,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:12:05,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284441727] [2019-12-07 16:12:05,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:12:05,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:12:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:12:05,343 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 3 states. [2019-12-07 16:12:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:05,371 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2019-12-07 16:12:05,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:12:05,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 16:12:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:05,372 INFO L225 Difference]: With dead ends: 157 [2019-12-07 16:12:05,373 INFO L226 Difference]: Without dead ends: 81 [2019-12-07 16:12:05,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:12:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-07 16:12:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-12-07 16:12:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 16:12:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2019-12-07 16:12:05,382 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 6 [2019-12-07 16:12:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:05,382 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2019-12-07 16:12:05,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:12:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2019-12-07 16:12:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:12:05,382 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,383 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:05,383 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1225687709, now seen corresponding path program 1 times [2019-12-07 16:12:05,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031197542] [2019-12-07 16:12:05,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:12:05,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031197542] [2019-12-07 16:12:05,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:12:05,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436648452] [2019-12-07 16:12:05,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:12:05,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:12:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:12:05,430 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 4 states. [2019-12-07 16:12:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:05,503 INFO L93 Difference]: Finished difference Result 212 states and 231 transitions. [2019-12-07 16:12:05,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:12:05,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:12:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:05,505 INFO L225 Difference]: With dead ends: 212 [2019-12-07 16:12:05,505 INFO L226 Difference]: Without dead ends: 206 [2019-12-07 16:12:05,506 INFO L630 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 [2019-12-07 16:12:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-07 16:12:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 83. [2019-12-07 16:12:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 16:12:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2019-12-07 16:12:05,516 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 8 [2019-12-07 16:12:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:05,516 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2019-12-07 16:12:05,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:12:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2019-12-07 16:12:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 16:12:05,517 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,517 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:05,518 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash 139321444, now seen corresponding path program 1 times [2019-12-07 16:12:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025156738] [2019-12-07 16:12:05,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 16:12:05,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025156738] [2019-12-07 16:12:05,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 16:12:05,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871021577] [2019-12-07 16:12:05,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:12:05,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:12:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:12:05,588 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2019-12-07 16:12:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:05,729 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2019-12-07 16:12:05,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:12:05,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 16:12:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:05,730 INFO L225 Difference]: With dead ends: 110 [2019-12-07 16:12:05,730 INFO L226 Difference]: Without dead ends: 108 [2019-12-07 16:12:05,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:12:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-07 16:12:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2019-12-07 16:12:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 16:12:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2019-12-07 16:12:05,735 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 15 [2019-12-07 16:12:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:05,736 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2019-12-07 16:12:05,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:12:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2019-12-07 16:12:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 16:12:05,736 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,736 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:05,737 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 117372431, now seen corresponding path program 1 times [2019-12-07 16:12:05,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920259338] [2019-12-07 16:12:05,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 16:12:05,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920259338] [2019-12-07 16:12:05,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 16:12:05,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786978460] [2019-12-07 16:12:05,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:12:05,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:12:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:12:05,784 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 5 states. [2019-12-07 16:12:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:05,892 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2019-12-07 16:12:05,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:12:05,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 16:12:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:05,893 INFO L225 Difference]: With dead ends: 81 [2019-12-07 16:12:05,893 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 16:12:05,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:12:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 16:12:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-12-07 16:12:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-07 16:12:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2019-12-07 16:12:05,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 15 [2019-12-07 16:12:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:05,899 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2019-12-07 16:12:05,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:12:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2019-12-07 16:12:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 16:12:05,899 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:05,899 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:05,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1592696504, now seen corresponding path program 1 times [2019-12-07 16:12:05,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:05,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585394902] [2019-12-07 16:12:05,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:12:05,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585394902] [2019-12-07 16:12:05,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:05,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 16:12:05,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796505427] [2019-12-07 16:12:05,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:12:05,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:12:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:12:05,946 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 5 states. [2019-12-07 16:12:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:06,144 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2019-12-07 16:12:06,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:12:06,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-12-07 16:12:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:06,146 INFO L225 Difference]: With dead ends: 189 [2019-12-07 16:12:06,147 INFO L226 Difference]: Without dead ends: 187 [2019-12-07 16:12:06,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:12:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-07 16:12:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2019-12-07 16:12:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-07 16:12:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2019-12-07 16:12:06,154 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 18 [2019-12-07 16:12:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:06,154 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2019-12-07 16:12:06,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:12:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2019-12-07 16:12:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 16:12:06,155 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:06,155 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:06,155 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 544596794, now seen corresponding path program 1 times [2019-12-07 16:12:06,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:06,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015232393] [2019-12-07 16:12:06,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:12:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:12:06,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015232393] [2019-12-07 16:12:06,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:12:06,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 16:12:06,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386632030] [2019-12-07 16:12:06,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:12:06,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:12:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:12:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:12:06,195 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 5 states. [2019-12-07 16:12:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:12:06,484 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2019-12-07 16:12:06,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:12:06,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-12-07 16:12:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:12:06,485 INFO L225 Difference]: With dead ends: 187 [2019-12-07 16:12:06,485 INFO L226 Difference]: Without dead ends: 185 [2019-12-07 16:12:06,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:12:06,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-07 16:12:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 91. [2019-12-07 16:12:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-07 16:12:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2019-12-07 16:12:06,490 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 18 [2019-12-07 16:12:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:12:06,490 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2019-12-07 16:12:06,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:12:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2019-12-07 16:12:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 16:12:06,491 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:12:06,491 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:12:06,491 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:12:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:12:06,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1523817848, now seen corresponding path program 1 times [2019-12-07 16:12:06,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:12:06,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530899927] [2019-12-07 16:12:06,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:12:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:12:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:12:06,534 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:12:06,534 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:12:06,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:12:06 BoogieIcfgContainer [2019-12-07 16:12:06,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:12:06,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:12:06,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:12:06,556 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:12:06,556 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:12:05" (3/4) ... [2019-12-07 16:12:06,558 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:12:06,590 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6ad84406-5bab-41b2-b3d8-a8192fc69f0f/bin/utaipan/witness.graphml [2019-12-07 16:12:06,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:12:06,592 INFO L168 Benchmark]: Toolchain (without parser) took 2551.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -123.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:12:06,592 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:12:06,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -138.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:12:06,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.04 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:12:06,593 INFO L168 Benchmark]: Boogie Preprocessor took 30.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:12:06,593 INFO L168 Benchmark]: RCFGBuilder took 650.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 982.6 MB in the end (delta: 83.2 MB). Peak memory consumption was 83.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:12:06,594 INFO L168 Benchmark]: TraceAbstraction took 1471.11 ms. Allocated memory is still 1.1 GB. Free memory was 982.6 MB in the beginning and 1.1 GB in the end (delta: -85.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:12:06,594 INFO L168 Benchmark]: Witness Printer took 34.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:12:06,595 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 324.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -138.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.04 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 650.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 982.6 MB in the end (delta: 83.2 MB). Peak memory consumption was 83.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1471.11 ms. Allocated memory is still 1.1 GB. Free memory was 982.6 MB in the beginning and 1.1 GB in the end (delta: -85.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 34.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 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: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); [L630] COND FALSE !(!node) [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); [L635] COND FALSE !(!item) [L637] item->slist = node [L638] item->next = data [L639] data = item [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) [L604] COND FALSE !(!(shape)) [L605] shape->next [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) [L612] EXPR shape->next [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 13 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 488 SDtfs, 715 SDslu, 764 SDs, 0 SdLazy, 420 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, 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, 7 MinimizatonAttempts, 346 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 6726 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...