./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.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_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 ed4d18349810257ce078dfe4f08b9b953ed4516f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 ed4d18349810257ce078dfe4f08b9b953ed4516f ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 17:02:39,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:02:39,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:02:39,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:02:39,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:02:39,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:02:39,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:02:39,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:02:39,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:02:39,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:02:39,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:02:39,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:02:39,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:02:39,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:02:39,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:02:39,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:02:39,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:02:39,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:02:39,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:02:39,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:02:39,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:02:39,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:02:39,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:02:39,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:02:39,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:02:39,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:02:39,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:02:39,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:02:39,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:02:39,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:02:39,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:02:39,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:02:39,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:02:39,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:02:39,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:02:39,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:02:39,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:02:39,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:02:39,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:02:39,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:02:39,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:02:39,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 17:02:39,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:02:39,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:02:39,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 17:02:39,243 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 17:02:39,243 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 17:02:39,243 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 17:02:39,243 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 17:02:39,244 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 17:02:39,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 17:02:39,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 17:02:39,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 17:02:39,244 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 17:02:39,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 17:02:39,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 17:02:39,245 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 17:02:39,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:02:39,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:02:39,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:02:39,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:02:39,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:02:39,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:02:39,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:02:39,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:02:39,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:02:39,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 17:02:39,249 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_ef6e5fce-ce59-45db-956d-baf31222a235/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 -> ed4d18349810257ce078dfe4f08b9b953ed4516f [2019-12-07 17:02:39,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:02:39,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:02:39,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:02:39,372 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:02:39,373 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:02:39,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-12-07 17:02:39,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/252dac173/18792d0be115405a8b22b1208b77d900/FLAGdcdefc5a3 [2019-12-07 17:02:39,788 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:02:39,788 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-12-07 17:02:39,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/252dac173/18792d0be115405a8b22b1208b77d900/FLAGdcdefc5a3 [2019-12-07 17:02:40,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/252dac173/18792d0be115405a8b22b1208b77d900 [2019-12-07 17:02:40,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:02:40,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:02:40,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:02:40,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:02:40,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:02:40,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62645e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40, skipping insertion in model container [2019-12-07 17:02:40,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:02:40,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:02:40,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:02:40,416 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:02:40,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:02:40,478 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:02:40,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40 WrapperNode [2019-12-07 17:02:40,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:02:40,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:02:40,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:02:40,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:02:40,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:02:40,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:02:40,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:02:40,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:02:40,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... [2019-12-07 17:02:40,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:02:40,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:02:40,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:02:40,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:02:40,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:02:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:02:40,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:02:40,957 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:02:40,957 INFO L287 CfgBuilder]: Removed 26 assume(true) statements. [2019-12-07 17:02:40,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:02:40 BoogieIcfgContainer [2019-12-07 17:02:40,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:02:40,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:02:40,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:02:40,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:02:40,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:02:40" (1/3) ... [2019-12-07 17:02:40,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a007fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:02:40, skipping insertion in model container [2019-12-07 17:02:40,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:40" (2/3) ... [2019-12-07 17:02:40,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a007fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:02:40, skipping insertion in model container [2019-12-07 17:02:40,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:02:40" (3/3) ... [2019-12-07 17:02:40,964 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2019-12-07 17:02:40,970 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:02:40,976 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:02:40,984 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:02:40,998 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:02:40,998 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:02:40,998 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:02:40,998 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:02:40,999 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:02:40,999 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:02:40,999 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:02:40,999 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:02:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 17:02:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 17:02:41,011 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:41,011 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:41,012 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash 896114023, now seen corresponding path program 1 times [2019-12-07 17:02:41,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 17:02:41,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189375039] [2019-12-07 17:02:41,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:02:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:41,154 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 17:02:41,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189375039] [2019-12-07 17:02:41,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:02:41,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:02:41,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10847635] [2019-12-07 17:02:41,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:02:41,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 17:02:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:02:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:02:41,174 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-12-07 17:02:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:41,213 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2019-12-07 17:02:41,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:02:41,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 17:02:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:41,223 INFO L225 Difference]: With dead ends: 33 [2019-12-07 17:02:41,223 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 17:02:41,226 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 17:02:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 17:02:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 17:02:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 17:02:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-12-07 17:02:41,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-12-07 17:02:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:41,249 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-12-07 17:02:41,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:02:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-12-07 17:02:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:02:41,249 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:41,250 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:41,250 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash -877678715, now seen corresponding path program 1 times [2019-12-07 17:02:41,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 17:02:41,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269801791] [2019-12-07 17:02:41,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:02:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:41,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269801791] [2019-12-07 17:02:41,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:02:41,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:02:41,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486824862] [2019-12-07 17:02:41,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:02:41,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 17:02:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:02:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:02:41,322 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2019-12-07 17:02:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:41,343 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2019-12-07 17:02:41,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:02:41,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 17:02:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:41,345 INFO L225 Difference]: With dead ends: 24 [2019-12-07 17:02:41,345 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 17:02:41,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 17:02:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 17:02:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2019-12-07 17:02:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 17:02:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-12-07 17:02:41,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2019-12-07 17:02:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:41,350 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-12-07 17:02:41,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:02:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-12-07 17:02:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:02:41,351 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:41,351 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:41,351 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1071153854, now seen corresponding path program 1 times [2019-12-07 17:02:41,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 17:02:41,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520225022] [2019-12-07 17:02:41,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:02:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:41,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520225022] [2019-12-07 17:02:41,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45251828] [2019-12-07 17:02:41,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:41,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:02:41,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:41,507 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:41,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604844334] [2019-12-07 17:02:41,545 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-12-07 17:02:41,545 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 17:02:41,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 17:02:41,553 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 17:02:41,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 17:02:41,683 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:42,021 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:42,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:42,404 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:42,655 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:42,979 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:43,112 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:43,528 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 17:02:43,558 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 17:02:44,053 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 108 [2019-12-07 17:02:44,242 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2019-12-07 17:02:45,228 WARN L192 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 140 [2019-12-07 17:02:46,478 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 192 DAG size of output: 142 [2019-12-07 17:02:46,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 17:02:46,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 12 [2019-12-07 17:02:46,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736173366] [2019-12-07 17:02:46,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 17:02:46,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 17:02:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 17:02:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:02:46,481 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 7 states. [2019-12-07 17:02:46,682 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2019-12-07 17:02:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:46,838 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-12-07 17:02:46,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 17:02:46,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 17:02:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:46,839 INFO L225 Difference]: With dead ends: 20 [2019-12-07 17:02:46,839 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 17:02:46,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-07 17:02:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 17:02:46,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 17:02:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:02:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2019-12-07 17:02:46,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2019-12-07 17:02:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:46,844 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2019-12-07 17:02:46,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 17:02:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2019-12-07 17:02:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 17:02:46,845 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:46,845 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:47,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:02:47,046 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1442698977, now seen corresponding path program 1 times [2019-12-07 17:02:47,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 17:02:47,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16765828] [2019-12-07 17:02:47,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:02:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:47,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16765828] [2019-12-07 17:02:47,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:02:47,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:02:47,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259350345] [2019-12-07 17:02:47,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:02:47,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 17:02:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:02:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:02:47,077 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 4 states. [2019-12-07 17:02:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:47,099 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-12-07 17:02:47,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:02:47,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 17:02:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:47,100 INFO L225 Difference]: With dead ends: 29 [2019-12-07 17:02:47,100 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 17:02:47,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:02:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 17:02:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2019-12-07 17:02:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 17:02:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-12-07 17:02:47,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2019-12-07 17:02:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:47,106 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-12-07 17:02:47,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:02:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-12-07 17:02:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:02:47,106 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:47,106 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:47,107 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -254145272, now seen corresponding path program 2 times [2019-12-07 17:02:47,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 17:02:47,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966400649] [2019-12-07 17:02:47,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:02:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:02:47,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966400649] [2019-12-07 17:02:47,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509449076] [2019-12-07 17:02:47,400 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:47,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 17:02:47,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:02:47,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 90 conjunts are in the unsatisfiable core [2019-12-07 17:02:47,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:49,823 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2019-12-07 17:02:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:02:50,110 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:50,954 WARN L192 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-12-07 17:02:51,283 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-12-07 17:02:51,509 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@54151a7e [2019-12-07 17:02:51,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150841862] [2019-12-07 17:02:51,510 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-12-07 17:02:51,510 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 17:02:51,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 17:02:51,511 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 17:02:51,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 17:02:51,516 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@54151a7e 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 17:02:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:02:51,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-12-07 17:02:51,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878970377] [2019-12-07 17:02:51,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 17:02:51,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 17:02:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 17:02:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 17:02:51,519 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand 15 states. [2019-12-07 17:02:51,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:02:51,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:02:51,720 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@54151a7e 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 17:02:51,723 INFO L168 Benchmark]: Toolchain (without parser) took 11564.20 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 303.0 MB). Free memory was 938.1 MB in the beginning and 888.2 MB in the end (delta: 49.9 MB). Peak memory consumption was 352.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:02:51,724 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:02:51,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -147.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:02:51,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.78 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 17:02:51,724 INFO L168 Benchmark]: Boogie Preprocessor took 22.54 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 17:02:51,725 INFO L168 Benchmark]: RCFGBuilder took 423.10 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: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:02:51,725 INFO L168 Benchmark]: TraceAbstraction took 10762.94 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 195.0 MB). Free memory was 1.0 GB in the beginning and 888.2 MB in the end (delta: 136.7 MB). Peak memory consumption was 331.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:02:51,726 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 318.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -147.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.78 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 22.54 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 423.10 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: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10762.94 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 195.0 MB). Free memory was 1.0 GB in the beginning and 888.2 MB in the end (delta: 136.7 MB). Peak memory consumption was 331.8 MB. 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@54151a7e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@54151a7e: 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 17:02:53,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:02:53,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:02:53,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:02:53,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:02:53,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:02:53,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:02:53,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:02:53,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:02:53,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:02:53,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:02:53,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:02:53,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:02:53,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:02:53,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:02:53,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:02:53,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:02:53,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:02:53,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:02:53,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:02:53,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:02:53,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:02:53,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:02:53,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:02:53,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:02:53,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:02:53,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:02:53,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:02:53,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:02:53,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:02:53,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:02:53,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:02:53,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:02:53,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:02:53,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:02:53,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:02:53,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:02:53,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:02:53,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:02:53,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:02:53,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:02:53,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 17:02:53,159 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:02:53,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:02:53,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 17:02:53,160 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 17:02:53,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 17:02:53,161 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 17:02:53,161 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 17:02:53,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 17:02:53,161 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 17:02:53,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 17:02:53,162 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:02:53,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:02:53,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:02:53,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 17:02:53,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:02:53,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:02:53,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 17:02:53,165 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_ef6e5fce-ce59-45db-956d-baf31222a235/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 -> ed4d18349810257ce078dfe4f08b9b953ed4516f [2019-12-07 17:02:53,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:02:53,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:02:53,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:02:53,353 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:02:53,353 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:02:53,353 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-12-07 17:02:53,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/4192e6d9e/ebf4c89d42e9460c8c2e39855cbe560a/FLAG5fbbcc63f [2019-12-07 17:02:53,863 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:02:53,863 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-12-07 17:02:53,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/4192e6d9e/ebf4c89d42e9460c8c2e39855cbe560a/FLAG5fbbcc63f [2019-12-07 17:02:53,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/data/4192e6d9e/ebf4c89d42e9460c8c2e39855cbe560a [2019-12-07 17:02:53,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:02:53,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:02:53,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:02:53,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:02:53,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:02:53,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:02:53" (1/1) ... [2019-12-07 17:02:53,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3004c47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:53, skipping insertion in model container [2019-12-07 17:02:53,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:02:53" (1/1) ... [2019-12-07 17:02:53,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:02:53,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:02:54,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:02:54,135 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:02:54,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:02:54,209 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:02:54,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54 WrapperNode [2019-12-07 17:02:54,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:02:54,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:02:54,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:02:54,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:02:54,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:02:54,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:02:54,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:02:54,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:02:54,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... [2019-12-07 17:02:54,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:02:54,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:02:54,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:02:54,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:02:54,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 17:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:02:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:02:54,606 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:02:54,606 INFO L287 CfgBuilder]: Removed 26 assume(true) statements. [2019-12-07 17:02:54,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:02:54 BoogieIcfgContainer [2019-12-07 17:02:54,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:02:54,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:02:54,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:02:54,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:02:54,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:02:53" (1/3) ... [2019-12-07 17:02:54,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b625ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:02:54, skipping insertion in model container [2019-12-07 17:02:54,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:02:54" (2/3) ... [2019-12-07 17:02:54,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b625ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:02:54, skipping insertion in model container [2019-12-07 17:02:54,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:02:54" (3/3) ... [2019-12-07 17:02:54,612 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2019-12-07 17:02:54,619 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:02:54,623 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:02:54,630 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:02:54,646 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:02:54,646 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:02:54,646 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:02:54,646 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:02:54,646 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:02:54,646 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:02:54,646 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:02:54,646 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:02:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-12-07 17:02:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:02:54,659 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:54,660 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:54,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:54,664 INFO L82 PathProgramCache]: Analyzing trace with hash 364821611, now seen corresponding path program 1 times [2019-12-07 17:02:54,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 17:02:54,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952932571] [2019-12-07 17:02:54,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:54,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:02:54,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:54,782 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 17:02:54,783 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:54,796 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 17:02:54,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952932571] [2019-12-07 17:02:54,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:02:54,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 17:02:54,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720411635] [2019-12-07 17:02:54,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:02:54,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 17:02:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:02:54,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:02:54,813 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-12-07 17:02:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:54,844 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2019-12-07 17:02:54,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:02:54,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-12-07 17:02:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:54,855 INFO L225 Difference]: With dead ends: 66 [2019-12-07 17:02:54,855 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 17:02:54,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 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 17:02:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 17:02:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-12-07 17:02:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 17:02:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-12-07 17:02:54,886 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-12-07 17:02:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:54,887 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-12-07 17:02:54,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:02:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-12-07 17:02:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 17:02:54,887 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:54,888 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:55,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 17:02:55,089 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash -155461857, now seen corresponding path program 1 times [2019-12-07 17:02:55,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 17:02:55,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557718776] [2019-12-07 17:02:55,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/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 17:02:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:55,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:02:55,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,213 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557718776] [2019-12-07 17:02:55,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:02:55,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 17:02:55,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855768185] [2019-12-07 17:02:55,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 17:02:55,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 17:02:55,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 17:02:55,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:02:55,232 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2019-12-07 17:02:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:55,285 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-12-07 17:02:55,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:02:55,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-12-07 17:02:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:55,287 INFO L225 Difference]: With dead ends: 50 [2019-12-07 17:02:55,287 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 17:02:55,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:02:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 17:02:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-12-07 17:02:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 17:02:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-12-07 17:02:55,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2019-12-07 17:02:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:55,294 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-12-07 17:02:55,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 17:02:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-12-07 17:02:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 17:02:55,295 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:55,295 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:55,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 17:02:55,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 194768371, now seen corresponding path program 1 times [2019-12-07 17:02:55,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 17:02:55,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785494574] [2019-12-07 17:02:55,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 17:02:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:55,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 17:02:55,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,638 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785494574] [2019-12-07 17:02:55,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898090933] [2019-12-07 17:02:55,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:02:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:55,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 17:02:55,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,811 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981903215] [2019-12-07 17:02:55,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:02:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:55,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 17:02:55,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,907 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:02:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:02:55,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 17:02:55,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2019-12-07 17:02:55,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285454208] [2019-12-07 17:02:55,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 17:02:55,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 17:02:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 17:02:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:02:55,914 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-12-07 17:02:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:02:56,045 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2019-12-07 17:02:56,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 17:02:56,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-07 17:02:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:02:56,047 INFO L225 Difference]: With dead ends: 69 [2019-12-07 17:02:56,047 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 17:02:56,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-07 17:02:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 17:02:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2019-12-07 17:02:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 17:02:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-12-07 17:02:56,055 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2019-12-07 17:02:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:02:56,056 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-12-07 17:02:56,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 17:02:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-12-07 17:02:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 17:02:56,056 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:02:56,057 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:02:56,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:02:56,659 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:02:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:02:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash -385269850, now seen corresponding path program 1 times [2019-12-07 17:02:56,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 17:02:56,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664906089] [2019-12-07 17:02:56,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 17:02:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:02:56,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 17:02:56,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:02:56,841 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 17:02:56,841 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,844 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:02:56,844 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,844 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-12-07 17:02:56,873 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:02:56,874 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 17 [2019-12-07 17:02:56,875 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,881 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:02:56,881 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,882 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2019-12-07 17:02:56,913 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 17:02:56,913 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,922 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:02:56,922 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,922 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-12-07 17:02:56,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-12-07 17:02:56,948 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:02:56,961 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:02:56,961 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 17:02:56,962 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-12-07 17:02:57,033 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:03:13,450 WARN L192 SmtUtils]: Spent 16.42 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-12-07 17:03:13,451 INFO L343 Elim1Store]: treesize reduction 16, result has 89.7 percent of original size [2019-12-07 17:03:13,451 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 159 [2019-12-07 17:03:13,453 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:19,595 WARN L192 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2019-12-07 17:03:19,596 INFO L614 ElimStorePlain]: treesize reduction 168, result has 24.7 percent of original size [2019-12-07 17:03:19,597 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 17:03:19,597 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:55 [2019-12-07 17:03:21,676 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-12-07 17:03:21,825 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_37|], 12=[|v_#memory_$Pointer$.base_38|]} [2019-12-07 17:03:21,832 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 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 17:03:21,832 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:21,871 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:21,875 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:03:21,876 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:03:21,877 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:03:30,028 WARN L192 SmtUtils]: Spent 8.15 s on a formula simplification that was a NOOP. DAG size: 35 [2019-12-07 17:03:30,029 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:30,029 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 109 [2019-12-07 17:03:30,031 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:30,076 INFO L614 ElimStorePlain]: treesize reduction 82, result has 38.3 percent of original size [2019-12-07 17:03:30,076 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 17:03:30,076 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:51 [2019-12-07 17:03:30,258 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:03:30,283 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:30,283 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 47 [2019-12-07 17:03:30,284 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:30,293 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:30,293 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 17:03:30,293 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:17 [2019-12-07 17:03:30,344 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-07 17:03:30,345 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:30,356 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:30,357 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:03:30,357 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:30, output treesize:13 [2019-12-07 17:03:30,502 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 17:03:30,502 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:03:30,504 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:30,504 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 17:03:30,504 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 17:03:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:03:30,588 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:03:31,270 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 242 treesize of output 230 [2019-12-07 17:03:31,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:03:31,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:31,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:31,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:31,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:31,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:31,275 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-12-07 17:03:31,567 WARN L192 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-12-07 17:03:31,568 INFO L614 ElimStorePlain]: treesize reduction 446, result has 13.6 percent of original size [2019-12-07 17:03:31,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:03:31,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 17:03:31,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:03:31,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 17:03:31,574 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 17:03:31,614 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:31,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:03:31,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 17:03:31,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 17:03:31,616 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 7 xjuncts. [2019-12-07 17:03:31,616 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:68, output treesize:99 [2019-12-07 17:03:32,424 INFO L343 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2019-12-07 17:03:32,425 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 55 [2019-12-07 17:03:32,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,447 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:03:32,447 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2019-12-07 17:03:32,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:03:32,459 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_16, v_arrayElimCell_15], 3=[v_arrayElimCell_17]} [2019-12-07 17:03:32,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664906089] [2019-12-07 17:03:32,463 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@63719855 [2019-12-07 17:03:32,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676981590] [2019-12-07 17:03:32,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:03:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:03:32,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 17:03:32,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:03:32,690 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@63719855 [2019-12-07 17:03:32,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494390823] [2019-12-07 17:03:32,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef6e5fce-ce59-45db-956d-baf31222a235/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:03:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:03:32,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 17:03:32,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:03:32,748 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@63719855 [2019-12-07 17:03:32,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:03:32,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 17:03:32,748 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 17:03:32,749 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:03:33,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:03:33,371 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 17:03:33,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:03:33 BoogieIcfgContainer [2019-12-07 17:03:33,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:03:33,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:03:33,372 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:03:33,372 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:03:33,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:02:54" (3/4) ... [2019-12-07 17:03:33,374 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 17:03:33,374 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:03:33,375 INFO L168 Benchmark]: Toolchain (without parser) took 39490.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.5 MB). Free memory was 948.4 MB in the beginning and 975.8 MB in the end (delta: -27.4 MB). Peak memory consumption was 178.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:03:33,375 INFO L168 Benchmark]: CDTParser took 0.16 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 17:03:33,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -154.9 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:03:33,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.58 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 17:03:33,376 INFO L168 Benchmark]: Boogie Preprocessor took 25.37 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 17:03:33,377 INFO L168 Benchmark]: RCFGBuilder took 336.59 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: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:03:33,377 INFO L168 Benchmark]: TraceAbstraction took 38763.21 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 93.3 MB). Peak memory consumption was 170.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:03:33,377 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 1.2 GB. Free memory is still 975.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:03:33,379 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 324.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -154.9 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.37 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 336.59 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: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38763.21 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 93.3 MB). Peak memory consumption was 170.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.77 ms. Allocated memory is still 1.2 GB. Free memory is still 975.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 632]: 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: [L616] const int len = 2; [L617] const int data = 1; [L565] DLL temp = (DLL) malloc(sizeof(struct node)); [L566] COND FALSE !(((void *)0) == temp) [L569] temp->next = ((void *)0) [L570] temp->prev = ((void *)0) [L571] temp->data = data [L572] return temp; [L575] DLL head = node_create(data); [L576] DLL last = head; [L577] COND TRUE len > 1 [L565] DLL temp = (DLL) malloc(sizeof(struct node)); [L566] COND FALSE !(((void *)0) == temp) [L569] temp->next = ((void *)0) [L570] temp->prev = ((void *)0) [L571] temp->data = data [L572] return temp; [L578] DLL new_head = node_create(data); [L579] new_head->next = head [L580] COND TRUE \read(head) [L581] head->prev = new_head [L583] head = new_head [L584] len-- [L577] COND FALSE !(len > 1) [L586] last->next = head [L587] head->prev = last [L588] return head; [L618] DLL s = dll_circular_create(len, data); [L619] int i = 0; [L620] i = 0 [L620] COND TRUE i < len [L621] int new_data = i + len; [L609] COND FALSE !(index > 0) [L613] head->data = data [L620] i++ [L620] COND TRUE i < len [L621] int new_data = i + len; [L609] COND TRUE index > 0 [L610] EXPR head->next [L610] head = head->next [L611] index-- [L609] COND FALSE !(index > 0) [L613] head->data = data [L620] i++ [L620] COND FALSE !(i < len) [L624] i = 0 [L624] COND TRUE i < len [L625] int expected = i + len; [L602] COND FALSE !(index > 0) [L606] EXPR head->data [L606] return head->data; [L626] COND TRUE expected != dll_circular_get_data_at(s, i) [L632] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. Result: UNKNOWN, OverallTime: 38.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 165 SDslu, 191 SDs, 0 SdLazy, 77 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 37 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 11418 SizeOfPredicates, 14 NumberOfNonLiveVariables, 514 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 32/44 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...