./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.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_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 bebd3708d0e1127b0953933828504d3490382862 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 bebd3708d0e1127b0953933828504d3490382862 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:09:27,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:09:27,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:09:27,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:09:27,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:09:27,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:09:27,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:09:27,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:09:27,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:09:27,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:09:27,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:09:27,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:09:27,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:09:27,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:09:27,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:09:27,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:09:27,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:09:27,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:09:27,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:09:27,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:09:27,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:09:27,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:09:27,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:09:27,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:09:27,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:09:27,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:09:27,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:09:27,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:09:27,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:09:27,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:09:27,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:09:27,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:09:27,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:09:27,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:09:27,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:09:27,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:09:27,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:09:27,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:09:27,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:09:27,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:09:27,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:09:27,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:09:27,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:09:27,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:09:27,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:09:27,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:09:27,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:09:27,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:09:27,057 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:09:27,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:09:27,057 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:09:27,057 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:09:27,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:09:27,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:09:27,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:09:27,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:09:27,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:09:27,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:09:27,060 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_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 -> bebd3708d0e1127b0953933828504d3490382862 [2019-12-07 13:09:27,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:09:27,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:09:27,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:09:27,172 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:09:27,173 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:09:27,173 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 13:09:27,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/18bb3eb07/7cf17172d1474f2881dc9c931f90f8dc/FLAGebce4bc5a [2019-12-07 13:09:27,652 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:09:27,652 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 13:09:27,660 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/18bb3eb07/7cf17172d1474f2881dc9c931f90f8dc/FLAGebce4bc5a [2019-12-07 13:09:27,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/18bb3eb07/7cf17172d1474f2881dc9c931f90f8dc [2019-12-07 13:09:27,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:09:27,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:09:27,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:09:27,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:09:27,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:09:27,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:09:27" (1/1) ... [2019-12-07 13:09:27,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703d5350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:27, skipping insertion in model container [2019-12-07 13:09:27,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:09:27" (1/1) ... [2019-12-07 13:09:27,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:09:27,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:09:27,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:09:27,934 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:09:27,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:09:28,005 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:09:28,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28 WrapperNode [2019-12-07 13:09:28,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:09:28,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:09:28,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:09:28,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:09:28,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:09:28,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:09:28,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:09:28,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:09:28,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... [2019-12-07 13:09:28,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:09:28,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:09:28,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:09:28,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:09:28,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 13:09:28,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:09:28,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:09:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 13:09:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 13:09:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 13:09:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:09:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:09:28,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:09:28,359 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:09:28,359 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 13:09:28,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:09:28 BoogieIcfgContainer [2019-12-07 13:09:28,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:09:28,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:09:28,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:09:28,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:09:28,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:09:27" (1/3) ... [2019-12-07 13:09:28,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f147a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:09:28, skipping insertion in model container [2019-12-07 13:09:28,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:28" (2/3) ... [2019-12-07 13:09:28,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f147a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:09:28, skipping insertion in model container [2019-12-07 13:09:28,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:09:28" (3/3) ... [2019-12-07 13:09:28,364 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-12-07 13:09:28,370 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:09:28,375 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:09:28,382 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:09:28,396 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:09:28,396 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:09:28,396 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:09:28,396 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:09:28,397 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:09:28,397 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:09:28,397 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:09:28,397 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:09:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 13:09:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 13:09:28,409 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:28,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 13:09:28,410 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1037880396, now seen corresponding path program 1 times [2019-12-07 13:09:28,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:09:28,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270626734] [2019-12-07 13:09:28,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:09:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:28,537 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 13:09:28,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270626734] [2019-12-07 13:09:28,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:09:28,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:09:28,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049727232] [2019-12-07 13:09:28,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:09:28,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:09:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:09:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:09:28,552 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-12-07 13:09:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:09:28,577 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2019-12-07 13:09:28,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:09:28,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 13:09:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:09:28,585 INFO L225 Difference]: With dead ends: 33 [2019-12-07 13:09:28,585 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:09:28,587 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 13:09:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:09:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 13:09:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 13:09:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-12-07 13:09:28,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2019-12-07 13:09:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:09:28,611 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-12-07 13:09:28,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:09:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-12-07 13:09:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:09:28,611 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:28,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:09:28,611 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:28,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1448138322, now seen corresponding path program 1 times [2019-12-07 13:09:28,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:09:28,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175568753] [2019-12-07 13:09:28,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:09:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:28,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175568753] [2019-12-07 13:09:28,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707537642] [2019-12-07 13:09:28,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:28,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 13:09:28,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:28,732 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:28,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194683253] [2019-12-07 13:09:28,763 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 13:09:28,763 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:09:28,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:09:28,773 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:09:28,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:09:28,907 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:29,120 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:29,812 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:30,133 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:30,543 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:30,814 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:30,935 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:31,140 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:31,206 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:31,222 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:09:31,491 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:09:31,898 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 109 [2019-12-07 13:09:31,992 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:09:31,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:09:31,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-12-07 13:09:31,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557831067] [2019-12-07 13:09:31,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:09:31,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:09:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:09:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:09:31,995 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 6 states. [2019-12-07 13:09:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:09:32,031 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2019-12-07 13:09:32,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:09:32,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-12-07 13:09:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:09:32,032 INFO L225 Difference]: With dead ends: 29 [2019-12-07 13:09:32,032 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 13:09:32,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:09:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 13:09:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 13:09:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 13:09:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 13:09:32,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2019-12-07 13:09:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:09:32,035 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 13:09:32,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:09:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 13:09:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:09:32,036 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:32,036 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 13:09:32,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:32,238 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1796988628, now seen corresponding path program 2 times [2019-12-07 13:09:32,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:09:32,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207643323] [2019-12-07 13:09:32,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:09:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:09:32,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207643323] [2019-12-07 13:09:32,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528659713] [2019-12-07 13:09:32,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:33,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 13:09:33,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:09:33,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 13:09:33,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 13:09:33,640 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:33,757 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3120e4df [2019-12-07 13:09:33,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978509007] [2019-12-07 13:09:33,759 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 13:09:33,759 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:09:33,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:09:33,759 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:09:33,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:09:33,764 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3120e4df at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:91) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:555) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:428) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:234) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:09:33,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:09:33,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 13:09:33,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842789557] [2019-12-07 13:09:33,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:09:33,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:09:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:09:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:09:33,767 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-12-07 13:09:33,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:09:33,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:33,969 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3120e4df at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:09:33,976 INFO L168 Benchmark]: Toolchain (without parser) took 6303.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -180.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:33,977 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:33,978 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.8 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -132.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:09:33,979 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.19 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 13:09:33,980 INFO L168 Benchmark]: Boogie Preprocessor took 26.55 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 13:09:33,981 INFO L168 Benchmark]: RCFGBuilder took 290.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:09:33,983 INFO L168 Benchmark]: TraceAbstraction took 5613.30 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.2 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -88.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:33,987 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 334.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.8 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -132.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.19 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. * Boogie Preprocessor took 26.55 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. * RCFGBuilder took 290.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5613.30 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.2 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -88.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3120e4df de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3120e4df: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 13:09:35,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:09:35,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:09:35,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:09:35,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:09:35,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:09:35,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:09:35,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:09:35,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:09:35,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:09:35,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:09:35,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:09:35,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:09:35,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:09:35,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:09:35,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:09:35,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:09:35,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:09:35,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:09:35,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:09:35,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:09:35,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:09:35,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:09:35,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:09:35,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:09:35,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:09:35,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:09:35,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:09:35,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:09:35,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:09:35,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:09:35,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:09:35,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:09:35,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:09:35,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:09:35,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:09:35,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:09:35,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:09:35,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:09:35,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:09:35,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:09:35,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 13:09:35,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:09:35,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:09:35,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:09:35,411 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:09:35,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:09:35,411 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:09:35,411 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:09:35,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:09:35,412 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:09:35,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:09:35,412 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:09:35,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:09:35,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:09:35,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:09:35,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:09:35,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:09:35,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:09:35,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:09:35,416 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 -> bebd3708d0e1127b0953933828504d3490382862 [2019-12-07 13:09:35,590 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:09:35,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:09:35,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:09:35,603 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:09:35,603 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:09:35,604 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 13:09:35,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/71dc7981b/c212270f15d24b3ba0c99ba5b8291b33/FLAG524e8caaa [2019-12-07 13:09:36,080 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:09:36,080 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 13:09:36,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/71dc7981b/c212270f15d24b3ba0c99ba5b8291b33/FLAG524e8caaa [2019-12-07 13:09:36,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/data/71dc7981b/c212270f15d24b3ba0c99ba5b8291b33 [2019-12-07 13:09:36,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:09:36,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:09:36,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:09:36,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:09:36,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:09:36,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c66dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36, skipping insertion in model container [2019-12-07 13:09:36,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:09:36,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:09:36,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:09:36,685 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:09:36,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:09:36,762 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:09:36,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36 WrapperNode [2019-12-07 13:09:36,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:09:36,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:09:36,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:09:36,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:09:36,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:09:36,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:09:36,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:09:36,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:09:36,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... [2019-12-07 13:09:36,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:09:36,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:09:36,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:09:36,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:09:36,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/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 13:09:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 13:09:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 13:09:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 13:09:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 13:09:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:09:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 13:09:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:09:36,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:09:37,133 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:09:37,134 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 13:09:37,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:09:37 BoogieIcfgContainer [2019-12-07 13:09:37,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:09:37,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:09:37,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:09:37,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:09:37,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:09:36" (1/3) ... [2019-12-07 13:09:37,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0d4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:09:37, skipping insertion in model container [2019-12-07 13:09:37,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:09:36" (2/3) ... [2019-12-07 13:09:37,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0d4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:09:37, skipping insertion in model container [2019-12-07 13:09:37,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:09:37" (3/3) ... [2019-12-07 13:09:37,139 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-12-07 13:09:37,145 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:09:37,149 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:09:37,157 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:09:37,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:09:37,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:09:37,171 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:09:37,171 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:09:37,171 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:09:37,171 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:09:37,171 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:09:37,171 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:09:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 13:09:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:09:37,183 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:37,184 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:09:37,184 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2019-12-07 13:09:37,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 13:09:37,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003886752] [2019-12-07 13:09:37,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 13:09:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:37,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 13:09:37,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:37,285 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 13:09:37,285 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:37,296 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 13:09:37,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003886752] [2019-12-07 13:09:37,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:09:37,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 13:09:37,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598952051] [2019-12-07 13:09:37,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:09:37,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 13:09:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:09:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:09:37,312 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-12-07 13:09:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:09:37,416 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2019-12-07 13:09:37,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:09:37,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 13:09:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:09:37,427 INFO L225 Difference]: With dead ends: 44 [2019-12-07 13:09:37,427 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 13:09:37,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:09:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 13:09:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 13:09:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:09:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 13:09:37,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2019-12-07 13:09:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:09:37,456 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 13:09:37,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:09:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 13:09:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:09:37,456 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:37,456 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:09:37,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 13:09:37,658 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 1 times [2019-12-07 13:09:37,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 13:09:37,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316104653] [2019-12-07 13:09:37,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 13:09:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:37,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:09:37,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:37,809 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:37,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316104653] [2019-12-07 13:09:37,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732269653] [2019-12-07 13:09:37,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 13:09:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:37,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:09:37,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:37,952 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:37,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269089074] [2019-12-07 13:09:37,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:09:38,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:09:38,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:38,063 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:09:38,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 13:09:38,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2019-12-07 13:09:38,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11694123] [2019-12-07 13:09:38,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:09:38,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 13:09:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:09:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:09:38,137 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2019-12-07 13:09:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:09:38,622 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-12-07 13:09:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:09:38,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-07 13:09:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:09:38,624 INFO L225 Difference]: With dead ends: 45 [2019-12-07 13:09:38,624 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 13:09:38,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:09:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 13:09:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 13:09:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 13:09:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 13:09:38,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 16 [2019-12-07 13:09:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:09:38,632 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 13:09:38,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:09:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 13:09:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:09:38,633 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:09:38,633 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:09:39,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:39,236 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:09:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:09:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 2 times [2019-12-07 13:09:39,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 13:09:39,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550310910] [2019-12-07 13:09:39,239 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 13:09:39,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:09:39,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:09:39,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 13:09:39,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:09:39,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 13:09:39,492 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,500 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,500 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,500 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 13:09:39,530 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,530 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-12-07 13:09:39,531 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,553 INFO L614 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2019-12-07 13:09:39,555 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:39,555 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:21 [2019-12-07 13:09:39,604 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,604 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2019-12-07 13:09:39,606 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,641 INFO L614 ElimStorePlain]: treesize reduction 28, result has 48.1 percent of original size [2019-12-07 13:09:39,642 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:39,642 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:26 [2019-12-07 13:09:39,692 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,692 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2019-12-07 13:09:39,693 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,736 INFO L614 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2019-12-07 13:09:39,736 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:39,737 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:34 [2019-12-07 13:09:39,818 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,818 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2019-12-07 13:09:39,819 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,840 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,840 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,841 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2019-12-07 13:09:39,867 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2019-12-07 13:09:39,868 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,881 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,882 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,882 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:18 [2019-12-07 13:09:39,910 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:39,939 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,944 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:09:39,945 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2019-12-07 13:09:39,945 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,959 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:39,960 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:09:39,960 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:56, output treesize:14 [2019-12-07 13:09:39,998 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 13:09:39,999 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:09:40,002 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:40,002 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:09:40,002 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-07 13:09:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:09:40,024 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:09:40,083 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:40,100 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:40,102 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:40,106 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:40,106 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 13:09:40,106 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:22 [2019-12-07 13:09:40,164 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_36|], 2=[|v_#memory_int_40|]} [2019-12-07 13:09:40,201 INFO L343 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2019-12-07 13:09:40,202 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2019-12-07 13:09:40,202 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 13:09:40,233 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:48,352 WARN L192 SmtUtils]: Spent 8.12 s on a formula simplification that was a NOOP. DAG size: 27 [2019-12-07 13:09:48,352 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:48,353 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 76 [2019-12-07 13:09:48,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,385 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:09:48,386 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2019-12-07 13:09:48,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:09:48,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:09:48,394 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:09:48,394 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_16], 1=[v_arrayElimCell_15]} [2019-12-07 13:09:48,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550310910] [2019-12-07 13:09:48,400 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@492cdbd [2019-12-07 13:09:48,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989345019] [2019-12-07 13:09:48,400 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 13:09:48,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:09:48,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:09:48,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 13:09:48,755 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@492cdbd [2019-12-07 13:09:48,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838353744] [2019-12-07 13:09:48,755 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a34e8a5e-4dc4-4910-9e81-9b4a0366249d/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:48,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:09:48,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:09:48,951 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 13:09:48,952 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@492cdbd [2019-12-07 13:09:48,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:09:48,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 13:09:48,952 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 13:09:48,952 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 13:09:49,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:09:49,575 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 13:09:49,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:09:49 BoogieIcfgContainer [2019-12-07 13:09:49,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:09:49,576 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:09:49,576 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:09:49,576 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:09:49,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:09:37" (3/4) ... [2019-12-07 13:09:49,579 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 13:09:49,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:09:49,580 INFO L168 Benchmark]: Toolchain (without parser) took 13156.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 947.0 MB in the beginning and 1.2 GB in the end (delta: -219.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:49,580 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:49,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:09:49,581 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.69 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 13:09:49,581 INFO L168 Benchmark]: Boogie Preprocessor took 29.83 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. [2019-12-07 13:09:49,581 INFO L168 Benchmark]: RCFGBuilder took 304.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:09:49,582 INFO L168 Benchmark]: TraceAbstraction took 12440.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -91.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:49,582 INFO L168 Benchmark]: Witness Printer took 2.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:09:49,584 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 338.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.69 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.83 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 304.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12440.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -91.9 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 2.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 615]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L589] const int len = 5; [L590] const int data_init = 1; [L565] DLL last = (DLL) malloc(sizeof(struct node)); [L566] COND FALSE !(((void *)0) == last) [L569] last->next = last [L570] last->prev = last [L571] last->data = data [L572] DLL head = last; [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND FALSE !(len > 1) [L584] last->next = head [L585] head->prev = last [L586] return head; [L591] DLL head = dll_circular_create(len, data_init); [L592] int data_new = 1; [L593] DLL ptr = head; [L595] EXPR ptr->data [L595] COND TRUE data_init != ptr->data [L615] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Result: UNKNOWN, OverallTime: 12.3s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 60 SDslu, 108 SDs, 0 SdLazy, 37 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 5424 SizeOfPredicates, 12 NumberOfNonLiveVariables, 290 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/30 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...