./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-token-2.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_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/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 35a5ccff58935eefedf723cd2243fac7c8b8e61b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:21:48,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:48,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:48,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:48,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:48,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:48,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:48,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:48,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:48,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:48,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:48,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:48,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:48,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:48,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:48,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:48,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:48,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:48,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:48,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:48,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:48,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:48,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:48,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:48,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:48,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:48,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:48,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:48,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:48,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:48,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:48,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:48,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:48,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:48,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:48,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:48,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:48,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:48,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:48,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:48,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:48,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:21:48,975 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:48,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:48,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:48,976 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:48,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:48,977 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:48,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:48,977 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:48,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:48,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:48,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:48,980 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:48,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:48,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:48,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:48,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:48,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:48,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:48,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:48,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:48,982 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:48,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:48,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:48,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:48,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:48,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:48,984 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:48,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:48,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:48,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:48,984 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_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/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 -> 35a5ccff58935eefedf723cd2243fac7c8b8e61b [2019-10-22 11:21:49,016 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:49,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:49,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:49,040 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:49,041 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:49,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/../../sv-benchmarks/c/forester-heap/dll-token-2.i [2019-10-22 11:21:49,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/data/d76989f75/326be8fb7f0242f184f5bc277a4eb3d8/FLAGd413a1839 [2019-10-22 11:21:49,533 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:49,533 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/sv-benchmarks/c/forester-heap/dll-token-2.i [2019-10-22 11:21:49,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/data/d76989f75/326be8fb7f0242f184f5bc277a4eb3d8/FLAGd413a1839 [2019-10-22 11:21:49,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/data/d76989f75/326be8fb7f0242f184f5bc277a4eb3d8 [2019-10-22 11:21:49,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:49,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:49,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:49,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:49,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:49,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:49" (1/1) ... [2019-10-22 11:21:49,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450fa107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:49, skipping insertion in model container [2019-10-22 11:21:49,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:49" (1/1) ... [2019-10-22 11:21:49,943 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:49,990 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:50,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:50,357 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:50,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:50,436 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:50,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50 WrapperNode [2019-10-22 11:21:50,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:50,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:50,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:50,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:50,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:50,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:50,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:50,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:50,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... [2019-10-22 11:21:50,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:50,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:50,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:50,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:50,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/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 11:21:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:21:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:21:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:21:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:21:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:21:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:50,915 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:50,916 INFO L284 CfgBuilder]: Removed 19 assume(true) statements. [2019-10-22 11:21:50,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:50 BoogieIcfgContainer [2019-10-22 11:21:50,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:50,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:50,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:50,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:50,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:49" (1/3) ... [2019-10-22 11:21:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a90c34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:50, skipping insertion in model container [2019-10-22 11:21:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:50" (2/3) ... [2019-10-22 11:21:50,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a90c34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:50, skipping insertion in model container [2019-10-22 11:21:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:50" (3/3) ... [2019-10-22 11:21:50,924 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2019-10-22 11:21:50,934 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:50,941 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-10-22 11:21:50,951 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-10-22 11:21:50,973 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:50,973 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:50,973 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:50,973 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:50,974 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:50,974 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:50,974 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:50,974 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-10-22 11:21:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:21:50,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:50,994 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:21:50,996 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2019-10-22 11:21:51,010 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:51,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987351240] [2019-10-22 11:21:51,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:51,139 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 11:21:51,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987351240] [2019-10-22 11:21:51,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:51,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:51,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77173893] [2019-10-22 11:21:51,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:21:51,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:21:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:21:51,164 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-10-22 11:21:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:51,183 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-10-22 11:21:51,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:21:51,184 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-10-22 11:21:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:51,194 INFO L225 Difference]: With dead ends: 86 [2019-10-22 11:21:51,194 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 11:21:51,197 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 11:21:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 11:21:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-22 11:21:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 11:21:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-22 11:21:51,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2019-10-22 11:21:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:51,232 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-22 11:21:51,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:21:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-22 11:21:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:21:51,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:51,233 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:21:51,233 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2019-10-22 11:21:51,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:51,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144917754] [2019-10-22 11:21:51,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:51,342 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 11:21:51,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144917754] [2019-10-22 11:21:51,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:51,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:21:51,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291652885] [2019-10-22 11:21:51,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:51,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:51,345 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2019-10-22 11:21:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:51,435 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-22 11:21:51,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:51,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-10-22 11:21:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:51,436 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:21:51,436 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 11:21:51,437 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 11:21:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 11:21:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-22 11:21:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 11:21:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-22 11:21:51,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2019-10-22 11:21:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:51,442 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-22 11:21:51,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-22 11:21:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:21:51,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:51,442 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:51,442 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2019-10-22 11:21:51,443 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:51,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227024267] [2019-10-22 11:21:51,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:51,539 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 11:21:51,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227024267] [2019-10-22 11:21:51,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:51,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:21:51,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649927719] [2019-10-22 11:21:51,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:51,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:51,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:51,541 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2019-10-22 11:21:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:51,600 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-10-22 11:21:51,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:51,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-10-22 11:21:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:51,601 INFO L225 Difference]: With dead ends: 63 [2019-10-22 11:21:51,601 INFO L226 Difference]: Without dead ends: 61 [2019-10-22 11:21:51,602 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 11:21:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-22 11:21:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2019-10-22 11:21:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 11:21:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-22 11:21:51,607 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2019-10-22 11:21:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:51,607 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-22 11:21:51,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-22 11:21:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 11:21:51,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:51,608 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:51,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2019-10-22 11:21:51,609 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:51,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547125133] [2019-10-22 11:21:51,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:51,653 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 11:21:51,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547125133] [2019-10-22 11:21:51,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:51,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:51,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431466266] [2019-10-22 11:21:51,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:51,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:51,655 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2019-10-22 11:21:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:51,748 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-22 11:21:51,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:51,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-22 11:21:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:51,750 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:21:51,750 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:21:51,750 INFO L600 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 [2019-10-22 11:21:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:21:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-22 11:21:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 11:21:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-22 11:21:51,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 12 [2019-10-22 11:21:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:51,763 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-22 11:21:51,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-22 11:21:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 11:21:51,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:51,763 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:51,763 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:51,764 INFO L82 PathProgramCache]: Analyzing trace with hash -913344547, now seen corresponding path program 1 times [2019-10-22 11:21:51,764 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:51,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698266762] [2019-10-22 11:21:51,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:51,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:51,931 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 11:21:51,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698266762] [2019-10-22 11:21:51,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:51,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:51,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558572088] [2019-10-22 11:21:51,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:51,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:51,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:51,933 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2019-10-22 11:21:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:52,058 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-10-22 11:21:52,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:52,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-22 11:21:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:52,059 INFO L225 Difference]: With dead ends: 68 [2019-10-22 11:21:52,059 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 11:21:52,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:21:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 11:21:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-10-22 11:21:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 11:21:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-22 11:21:52,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 12 [2019-10-22 11:21:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:52,065 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-22 11:21:52,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-22 11:21:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 11:21:52,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:52,066 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:52,067 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash -313255267, now seen corresponding path program 1 times [2019-10-22 11:21:52,067 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:52,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309291005] [2019-10-22 11:21:52,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:52,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:52,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:52,132 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:21:52,132 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:52,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:52 BoogieIcfgContainer [2019-10-22 11:21:52,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:52,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:52,162 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:52,164 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:52,165 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:50" (3/4) ... [2019-10-22 11:21:52,167 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:21:52,212 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c74d7c0a-e0d6-4d20-8bc7-eeaa0327fbde/bin/utaipan/witness.graphml [2019-10-22 11:21:52,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:52,217 INFO L168 Benchmark]: Toolchain (without parser) took 2291.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 939.2 MB in the beginning and 999.2 MB in the end (delta: -60.1 MB). Peak memory consumption was 95.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,218 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:52,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 511.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 939.2 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,219 INFO L168 Benchmark]: Boogie Preprocessor took 30.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:52,219 INFO L168 Benchmark]: RCFGBuilder took 403.64 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,220 INFO L168 Benchmark]: TraceAbstraction took 1243.63 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: 96.3 MB). Peak memory consumption was 96.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,220 INFO L168 Benchmark]: Witness Printer took 53.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 999.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,229 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 511.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 939.2 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 403.64 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1243.63 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: 96.3 MB). Peak memory consumption was 96.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 999.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 6 error locations. Result: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 91 SDslu, 190 SDs, 0 SdLazy, 141 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1401 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...