./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_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_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 fabf658906da38258bbb10e77b5550f740cea929 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 fabf658906da38258bbb10e77b5550f740cea929 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 21:53:28,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:53:28,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:53:28,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:53:28,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:53:28,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:53:28,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:53:28,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:53:28,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:53:28,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:53:28,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:53:28,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:53:28,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:53:28,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:53:28,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:53:28,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:53:28,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:53:28,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:53:28,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:53:28,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:53:28,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:53:28,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:53:28,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:53:28,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:53:28,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:53:28,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:53:28,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:53:28,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:53:28,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:53:28,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:53:28,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:53:28,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:53:28,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:53:28,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:53:28,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:53:28,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:53:28,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:53:28,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:53:28,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:53:28,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:53:28,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:53:28,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:53:28,517 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:53:28,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:53:28,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:53:28,518 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:53:28,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:53:28,519 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:53:28,520 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:53:28,520 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:53:28,520 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:53:28,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:53:28,521 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:53:28,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:53:28,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:53:28,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:53:28,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:53:28,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:53:28,524 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_36697025-9e93-473c-8242-6dcad9f1d413/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 -> fabf658906da38258bbb10e77b5550f740cea929 [2019-12-07 21:53:28,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:53:28,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:53:28,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:53:28,639 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:53:28,639 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:53:28,640 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2n_update_all.i [2019-12-07 21:53:28,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/672494cb6/cc766932c0d94d2f867d718d85919283/FLAGc238d2218 [2019-12-07 21:53:29,125 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:53:29,125 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/sv-benchmarks/c/list-simple/dll2n_update_all.i [2019-12-07 21:53:29,135 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/672494cb6/cc766932c0d94d2f867d718d85919283/FLAGc238d2218 [2019-12-07 21:53:29,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/672494cb6/cc766932c0d94d2f867d718d85919283 [2019-12-07 21:53:29,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:53:29,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:53:29,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:29,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:53:29,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:53:29,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28319585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29, skipping insertion in model container [2019-12-07 21:53:29,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:53:29,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:53:29,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:29,400 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:53:29,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:29,461 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:53:29,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29 WrapperNode [2019-12-07 21:53:29,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:29,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:29,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:53:29,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:53:29,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:29,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:53:29,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:53:29,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:53:29,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... [2019-12-07 21:53:29,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:53:29,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:53:29,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:53:29,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:53:29,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:53:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:53:29,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:53:29,861 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:53:29,862 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-12-07 21:53:29,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:29 BoogieIcfgContainer [2019-12-07 21:53:29,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:53:29,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:53:29,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:53:29,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:53:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:53:29" (1/3) ... [2019-12-07 21:53:29,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40701542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:29, skipping insertion in model container [2019-12-07 21:53:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:29" (2/3) ... [2019-12-07 21:53:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40701542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:29, skipping insertion in model container [2019-12-07 21:53:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:29" (3/3) ... [2019-12-07 21:53:29,868 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2019-12-07 21:53:29,875 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:53:29,880 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:53:29,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:53:29,903 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:53:29,903 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:53:29,903 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:53:29,903 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:53:29,903 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:53:29,903 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:53:29,903 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:53:29,903 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:53:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-12-07 21:53:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 21:53:29,918 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:29,918 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:29,918 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash 73302926, now seen corresponding path program 1 times [2019-12-07 21:53:29,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:29,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416114123] [2019-12-07 21:53:29,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:30,029 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 21:53:30,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416114123] [2019-12-07 21:53:30,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:30,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:53:30,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251520474] [2019-12-07 21:53:30,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:53:30,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:53:30,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:53:30,044 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-12-07 21:53:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:30,079 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2019-12-07 21:53:30,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:53:30,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 21:53:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:30,087 INFO L225 Difference]: With dead ends: 27 [2019-12-07 21:53:30,087 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 21:53:30,090 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 21:53:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 21:53:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-12-07 21:53:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 21:53:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2019-12-07 21:53:30,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2019-12-07 21:53:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:30,112 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-12-07 21:53:30,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:53:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2019-12-07 21:53:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 21:53:30,113 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:30,113 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:30,113 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash -401203551, now seen corresponding path program 1 times [2019-12-07 21:53:30,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:30,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109607703] [2019-12-07 21:53:30,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:30,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109607703] [2019-12-07 21:53:30,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913328447] [2019-12-07 21:53:30,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:30,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:30,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:30,226 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:30,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825405465] [2019-12-07 21:53:30,258 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 21:53:30,258 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:30,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:30,268 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:30,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:30,420 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:30,672 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:31,104 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:31,428 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:31,491 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:31,832 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:32,185 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:53:32,502 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2019-12-07 21:53:32,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:53:32,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2019-12-07 21:53:32,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355934259] [2019-12-07 21:53:32,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 21:53:32,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 21:53:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 21:53:32,598 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 5 states. [2019-12-07 21:53:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:32,654 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2019-12-07 21:53:32,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 21:53:32,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 21:53:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:32,655 INFO L225 Difference]: With dead ends: 18 [2019-12-07 21:53:32,656 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 21:53:32,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 21:53:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 21:53:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 21:53:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 21:53:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-12-07 21:53:32,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2019-12-07 21:53:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:32,660 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-12-07 21:53:32,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 21:53:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-12-07 21:53:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 21:53:32,661 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:32,661 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:32,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:32,861 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1970333447, now seen corresponding path program 1 times [2019-12-07 21:53:32,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:32,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413628127] [2019-12-07 21:53:32,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:32,903 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 21:53:32,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413628127] [2019-12-07 21:53:32,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195064796] [2019-12-07 21:53:32,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:32,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:32,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:32,949 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 21:53:32,949 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:32,955 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 21:53:32,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263348732] [2019-12-07 21:53:32,957 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:53:32,957 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:32,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:32,957 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:32,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:33,003 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:33,187 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:33,645 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:33,910 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:33,958 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:34,322 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:34,610 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:34,666 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:34,780 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:53:35,057 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2019-12-07 21:53:35,422 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2019-12-07 21:53:35,805 WARN L192 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2019-12-07 21:53:35,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:53:35,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2019-12-07 21:53:35,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164259217] [2019-12-07 21:53:35,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 21:53:35,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 21:53:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 21:53:35,808 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2019-12-07 21:53:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:35,905 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2019-12-07 21:53:35,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 21:53:35,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 21:53:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:35,906 INFO L225 Difference]: With dead ends: 19 [2019-12-07 21:53:35,906 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 21:53:35,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 21:53:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 21:53:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-12-07 21:53:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 21:53:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2019-12-07 21:53:35,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 11 [2019-12-07 21:53:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:35,909 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2019-12-07 21:53:35,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 21:53:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2019-12-07 21:53:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 21:53:35,910 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:35,910 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:36,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:36,111 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2106720172, now seen corresponding path program 1 times [2019-12-07 21:53:36,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:36,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908233959] [2019-12-07 21:53:36,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:36,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908233959] [2019-12-07 21:53:36,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330279943] [2019-12-07 21:53:36,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:36,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:36,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:36,203 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:36,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691749151] [2019-12-07 21:53:36,210 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:53:36,210 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:36,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:36,210 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:36,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:36,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:36,480 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:36,791 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:37,075 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:37,127 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:37,615 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:38,118 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:53:38,263 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2019-12-07 21:53:38,572 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2019-12-07 21:53:39,034 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2019-12-07 21:53:39,035 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:53:39,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:53:39,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2019-12-07 21:53:39,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089395296] [2019-12-07 21:53:39,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 21:53:39,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 21:53:39,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-12-07 21:53:39,037 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand 5 states. [2019-12-07 21:53:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:39,062 INFO L93 Difference]: Finished difference Result 24 states and 34 transitions. [2019-12-07 21:53:39,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 21:53:39,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-12-07 21:53:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:39,063 INFO L225 Difference]: With dead ends: 24 [2019-12-07 21:53:39,063 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 21:53:39,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-12-07 21:53:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 21:53:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 21:53:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 21:53:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2019-12-07 21:53:39,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 12 [2019-12-07 21:53:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:39,067 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2019-12-07 21:53:39,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 21:53:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2019-12-07 21:53:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 21:53:39,067 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:39,068 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:39,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:39,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash -122988255, now seen corresponding path program 2 times [2019-12-07 21:53:39,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:39,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857343078] [2019-12-07 21:53:39,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 21:53:39,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857343078] [2019-12-07 21:53:39,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:39,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 21:53:39,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774155842] [2019-12-07 21:53:39,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:53:39,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:53:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 21:53:39,328 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand 4 states. [2019-12-07 21:53:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:39,349 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-12-07 21:53:39,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 21:53:39,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-12-07 21:53:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:39,350 INFO L225 Difference]: With dead ends: 30 [2019-12-07 21:53:39,350 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 21:53:39,350 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 21:53:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 21:53:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2019-12-07 21:53:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 21:53:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-12-07 21:53:39,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2019-12-07 21:53:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:39,355 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-12-07 21:53:39,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:53:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2019-12-07 21:53:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 21:53:39,355 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:39,355 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:39,355 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash -164171845, now seen corresponding path program 3 times [2019-12-07 21:53:39,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:39,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006417902] [2019-12-07 21:53:39,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:39,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006417902] [2019-12-07 21:53:39,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269591956] [2019-12-07 21:53:39,667 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:40,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 21:53:40,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:53:40,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2019-12-07 21:53:40,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:40,567 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:43,534 WARN L192 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 43 [2019-12-07 21:53:47,695 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 36 [2019-12-07 21:53:47,908 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-12-07 21:53:48,090 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-12-07 21:53:48,151 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@30adca11 [2019-12-07 21:53:48,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332554126] [2019-12-07 21:53:48,152 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:53:48,152 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:48,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:48,152 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:48,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:48,158 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@30adca11 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 21:53:48,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 21:53:48,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 21:53:48,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127337859] [2019-12-07 21:53:48,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 21:53:48,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 21:53:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 21:53:48,161 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 16 states. [2019-12-07 21:53:48,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:53:48,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:48,363 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@30adca11 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 21:53:48,367 INFO L168 Benchmark]: Toolchain (without parser) took 19220.35 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 307.2 MB). Free memory was 938.1 MB in the beginning and 1.2 GB in the end (delta: -220.4 MB). Peak memory consumption was 86.8 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:48,367 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:48,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:48,368 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.21 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 21:53:48,368 INFO L168 Benchmark]: Boogie Preprocessor took 21.03 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 21:53:48,368 INFO L168 Benchmark]: RCFGBuilder took 347.10 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: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:48,369 INFO L168 Benchmark]: TraceAbstraction took 18501.70 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 201.3 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -124.6 MB). Peak memory consumption was 76.7 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:48,370 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.21 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 21.03 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 347.10 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: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18501.70 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 201.3 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -124.6 MB). Peak memory consumption was 76.7 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@30adca11 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@30adca11: 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 21:53:49,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:53:49,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:53:49,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:53:49,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:53:49,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:53:49,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:53:49,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:53:49,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:53:49,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:53:49,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:53:49,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:53:49,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:53:49,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:53:49,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:53:49,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:53:49,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:53:49,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:53:49,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:53:49,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:53:49,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:53:49,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:53:49,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:53:49,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:53:49,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:53:49,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:53:49,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:53:49,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:53:49,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:53:49,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:53:49,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:53:49,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:53:49,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:53:49,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:53:49,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:53:49,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:53:49,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:53:49,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:53:49,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:53:49,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:53:49,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:53:49,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 21:53:49,774 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:53:49,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:53:49,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:53:49,775 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:53:49,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:53:49,775 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:53:49,775 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:53:49,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:53:49,775 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:53:49,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:53:49,776 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:53:49,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:53:49,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:53:49,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:53:49,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:53:49,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:53:49,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:53:49,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:53:49,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:53:49,779 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 21:53:49,779 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 21:53:49,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:53:49,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:53:49,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:53:49,779 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_36697025-9e93-473c-8242-6dcad9f1d413/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 -> fabf658906da38258bbb10e77b5550f740cea929 [2019-12-07 21:53:49,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:53:49,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:53:49,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:53:49,970 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:53:49,971 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:53:49,971 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2n_update_all.i [2019-12-07 21:53:50,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/7cc3c585f/870793dd09314063be903d93e689a034/FLAGbd6a0bda1 [2019-12-07 21:53:50,448 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:53:50,449 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/sv-benchmarks/c/list-simple/dll2n_update_all.i [2019-12-07 21:53:50,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/7cc3c585f/870793dd09314063be903d93e689a034/FLAGbd6a0bda1 [2019-12-07 21:53:50,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/data/7cc3c585f/870793dd09314063be903d93e689a034 [2019-12-07 21:53:50,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:53:50,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:53:50,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:50,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:53:50,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:53:50,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:50" (1/1) ... [2019-12-07 21:53:50,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51cf82c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:50, skipping insertion in model container [2019-12-07 21:53:50,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:50" (1/1) ... [2019-12-07 21:53:50,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:53:50,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:53:51,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:51,121 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:53:51,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:51,195 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:53:51,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51 WrapperNode [2019-12-07 21:53:51,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:51,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:51,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:53:51,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:53:51,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:51,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:53:51,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:53:51,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:53:51,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... [2019-12-07 21:53:51,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:53:51,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:53:51,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:53:51,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:53:51,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 21:53:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:53:51,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:53:51,561 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:53:51,561 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-12-07 21:53:51,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:51 BoogieIcfgContainer [2019-12-07 21:53:51,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:53:51,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:53:51,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:53:51,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:53:51,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:53:50" (1/3) ... [2019-12-07 21:53:51,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fd49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:51, skipping insertion in model container [2019-12-07 21:53:51,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:51" (2/3) ... [2019-12-07 21:53:51,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fd49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:51, skipping insertion in model container [2019-12-07 21:53:51,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:51" (3/3) ... [2019-12-07 21:53:51,566 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2019-12-07 21:53:51,572 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:53:51,576 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:53:51,583 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:53:51,597 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:53:51,597 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:53:51,597 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:53:51,597 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:53:51,598 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:53:51,598 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:53:51,598 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:53:51,598 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:53:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-12-07 21:53:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 21:53:51,610 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:51,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:51,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2019-12-07 21:53:51,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:51,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330836250] [2019-12-07 21:53:51,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:51,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 21:53:51,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:51,709 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 21:53:51,709 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:51,723 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 21:53:51,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330836250] [2019-12-07 21:53:51,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:51,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 21:53:51,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120197346] [2019-12-07 21:53:51,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:53:51,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:53:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 21:53:51,740 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2019-12-07 21:53:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:51,772 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2019-12-07 21:53:51,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 21:53:51,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 21:53:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:51,779 INFO L225 Difference]: With dead ends: 57 [2019-12-07 21:53:51,779 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 21:53:51,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 21:53:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 21:53:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 21:53:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 21:53:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 21:53:51,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2019-12-07 21:53:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:51,811 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 21:53:51,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:53:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 21:53:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 21:53:51,812 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:51,812 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:52,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 21:53:52,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1320261154, now seen corresponding path program 1 times [2019-12-07 21:53:52,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:52,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589099339] [2019-12-07 21:53:52,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:52,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:53:52,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:52,115 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:52,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589099339] [2019-12-07 21:53:52,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:52,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-12-07 21:53:52,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019698675] [2019-12-07 21:53:52,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:53:52,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:53:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:53:52,121 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-12-07 21:53:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:52,187 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-12-07 21:53:52,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:53:52,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-12-07 21:53:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:52,188 INFO L225 Difference]: With dead ends: 51 [2019-12-07 21:53:52,188 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 21:53:52,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 21:53:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 21:53:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 21:53:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 21:53:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-12-07 21:53:52,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2019-12-07 21:53:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:52,193 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-12-07 21:53:52,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:53:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-12-07 21:53:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 21:53:52,193 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:52,194 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:52,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 21:53:52,394 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash 980561436, now seen corresponding path program 1 times [2019-12-07 21:53:52,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:52,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412258191] [2019-12-07 21:53:52,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/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 21:53:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:52,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:53:52,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:52,499 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:52,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412258191] [2019-12-07 21:53:52,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:52,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 21:53:52,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287629756] [2019-12-07 21:53:52,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 21:53:52,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 21:53:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 21:53:52,516 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-12-07 21:53:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:52,574 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-12-07 21:53:52,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 21:53:52,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-12-07 21:53:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:52,576 INFO L225 Difference]: With dead ends: 51 [2019-12-07 21:53:52,576 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 21:53:52,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 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 21:53:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 21:53:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-12-07 21:53:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 21:53:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-12-07 21:53:52,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2019-12-07 21:53:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:52,582 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-12-07 21:53:52,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 21:53:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-12-07 21:53:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 21:53:52,583 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:52,583 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:52,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 21:53:52,784 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1570454256, now seen corresponding path program 1 times [2019-12-07 21:53:52,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:52,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42635521] [2019-12-07 21:53:52,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:52,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:52,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:52,880 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:52,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42635521] [2019-12-07 21:53:52,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899300502] [2019-12-07 21:53:52,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:53:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:53,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:53,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:53,028 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:53,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637618488] [2019-12-07 21:53:53,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:53,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:53,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:53,113 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 21:53:53,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 21:53:53,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2019-12-07 21:53:53,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757908322] [2019-12-07 21:53:53,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 21:53:53,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 21:53:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 21:53:53,119 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2019-12-07 21:53:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:53,254 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2019-12-07 21:53:53,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 21:53:53,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-12-07 21:53:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:53,256 INFO L225 Difference]: With dead ends: 70 [2019-12-07 21:53:53,256 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 21:53:53,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-07 21:53:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 21:53:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2019-12-07 21:53:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 21:53:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-12-07 21:53:53,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 31 [2019-12-07 21:53:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:53,263 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-12-07 21:53:53,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 21:53:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-12-07 21:53:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 21:53:53,264 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:53,264 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:53,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:53,867 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash -688680177, now seen corresponding path program 1 times [2019-12-07 21:53:53,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:53,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752828052] [2019-12-07 21:53:53,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:54,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 21:53:54,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:54,047 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 21:53:54,048 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,050 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,051 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,051 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-12-07 21:53:54,070 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,071 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 21:53:54,072 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,076 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,077 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,077 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:8 [2019-12-07 21:53:54,092 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:54,094 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2019-12-07 21:53:54,095 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,105 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,106 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,106 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:26 [2019-12-07 21:53:54,132 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:54,191 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,192 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 3 case distinctions, treesize of input 45 treesize of output 106 [2019-12-07 21:53:54,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:54,195 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,226 INFO L614 ElimStorePlain]: treesize reduction 46, result has 45.2 percent of original size [2019-12-07 21:53:54,227 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 21:53:54,227 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:38 [2019-12-07 21:53:54,439 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 10=[|v_#memory_$Pointer$.base_28|]} [2019-12-07 21:53:54,445 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 11 treesize of output 7 [2019-12-07 21:53:54,445 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,475 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,546 INFO L343 Elim1Store]: treesize reduction 24, result has 66.7 percent of original size [2019-12-07 21:53:54,547 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 44 treesize of output 75 [2019-12-07 21:53:54,548 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,582 INFO L614 ElimStorePlain]: treesize reduction 32, result has 54.9 percent of original size [2019-12-07 21:53:54,583 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 21:53:54,583 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:39 [2019-12-07 21:53:54,733 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 21:53:54,734 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:54,756 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,756 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 47 [2019-12-07 21:53:54,757 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,771 INFO L614 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-12-07 21:53:54,771 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 21:53:54,772 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:15 [2019-12-07 21:53:54,824 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 19 treesize of output 18 [2019-12-07 21:53:54,824 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,833 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,834 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 21:53:54,834 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:11 [2019-12-07 21:53:54,947 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 21:53:54,947 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:54,949 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:54,950 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 21:53:54,950 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 21:53:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:55,017 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:55,544 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:55,549 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:55,553 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 126 treesize of output 122 [2019-12-07 21:53:55,554 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:55,646 INFO L614 ElimStorePlain]: treesize reduction 35, result has 62.4 percent of original size [2019-12-07 21:53:55,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 21:53:55,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:55,647 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 4 xjuncts. [2019-12-07 21:53:55,648 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:60, output treesize:28 [2019-12-07 21:53:56,240 INFO L343 Elim1Store]: treesize reduction 95, result has 32.1 percent of original size [2019-12-07 21:53:56,240 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 53 treesize of output 58 [2019-12-07 21:53:56,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:56,249 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:56,249 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2019-12-07 21:53:56,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:56,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:56,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:56,253 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_14], 4=[v_arrayElimCell_15]} [2019-12-07 21:53:56,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752828052] [2019-12-07 21:53:56,257 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4febbd9b [2019-12-07 21:53:56,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337503740] [2019-12-07 21:53:56,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:53:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:56,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 21:53:56,450 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4febbd9b [2019-12-07 21:53:56,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664906089] [2019-12-07 21:53:56,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36697025-9e93-473c-8242-6dcad9f1d413/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:56,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 21:53:56,501 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4febbd9b [2019-12-07 21:53:56,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:56,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 21:53:56,501 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 21:53:56,501 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 21:53:57,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:57,121 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 21:53:57,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:53:57 BoogieIcfgContainer [2019-12-07 21:53:57,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:53:57,122 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:53:57,122 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:53:57,122 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:53:57,122 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:51" (3/4) ... [2019-12-07 21:53:57,124 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 21:53:57,125 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:53:57,125 INFO L168 Benchmark]: Toolchain (without parser) took 6320.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.3 MB). Free memory was 947.0 MB in the beginning and 1.0 GB in the end (delta: -92.3 MB). Peak memory consumption was 109.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:57,126 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:57,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:57,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.67 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 21:53:57,127 INFO L168 Benchmark]: Boogie Preprocessor took 25.46 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 21:53:57,127 INFO L168 Benchmark]: RCFGBuilder took 305.79 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: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:57,127 INFO L168 Benchmark]: TraceAbstraction took 5559.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.7 MB). Peak memory consumption was 111.7 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:57,128 INFO L168 Benchmark]: Witness Printer took 2.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:57,129 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 388.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.67 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 25.46 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 305.79 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: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5559.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.7 MB). Peak memory consumption was 111.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 630]: 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: [L614] const int len = 2; [L615] const int data = 1; [L575] DLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] DLL new_head = (DLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->data = data [L582] new_head->next = head [L583] new_head->prev = ((void *)0) [L584] COND FALSE !(\read(head)) [L587] head = new_head [L588] len-- [L576] COND TRUE len > 0 [L577] DLL new_head = (DLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->data = data [L582] new_head->next = head [L583] new_head->prev = ((void *)0) [L584] COND TRUE \read(head) [L585] head->prev = new_head [L587] head = new_head [L588] len-- [L576] COND FALSE !(len > 0) [L590] return head; [L616] DLL s = dll_create(len, data); [L617] int i; [L618] i = 0 [L618] COND TRUE i < len [L619] int new_data = i + len; [L607] COND FALSE !(index > 0) [L611] head->data = data [L618] i++ [L618] COND TRUE i < len [L619] int new_data = i + len; [L607] COND TRUE index > 0 [L608] EXPR head->next [L608] head = head->next [L609] index-- [L607] COND FALSE !(index > 0) [L611] head->data = data [L618] i++ [L618] COND FALSE !(i < len) [L622] i = 0 [L622] COND TRUE i < len [L623] int expected = i + len; [L600] COND FALSE !(index > 0) [L604] EXPR head->data [L604] return head->data; [L624] COND TRUE expected != dll_get_data_at(s, i) [L630] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: UNKNOWN, OverallTime: 5.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 148 SDslu, 211 SDs, 0 SdLazy, 88 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 292 ConstructedInterpolants, 0 QuantifiedInterpolants, 13724 SizeOfPredicates, 16 NumberOfNonLiveVariables, 528 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 94/106 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...