./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 6e0f1ca0eb16fbf37a6e5e5696159539bb44bf22 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 6e0f1ca0eb16fbf37a6e5e5696159539bb44bf22 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@170b4bf --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:11:46,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:11:46,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:11:46,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:11:46,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:11:46,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:11:46,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:11:46,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:11:46,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:11:46,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:11:46,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:11:46,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:11:46,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:11:46,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:11:46,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:11:46,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:11:46,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:11:46,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:11:46,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:11:46,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:11:46,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:11:46,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:11:46,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:11:46,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:11:46,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:11:46,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:11:46,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:11:46,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:11:46,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:11:46,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:11:46,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:11:46,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:11:46,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:11:46,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:11:46,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:11:46,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:11:46,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:11:46,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:11:46,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:11:46,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:11:46,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:11:46,546 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 15:11:46,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:11:46,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:11:46,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 15:11:46,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 15:11:46,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 15:11:46,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 15:11:46,558 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 15:11:46,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 15:11:46,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 15:11:46,558 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 15:11:46,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:11:46,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:11:46,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:11:46,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:11:46,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:11:46,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 15:11:46,561 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_1080f4f2-f439-4667-88fc-c33e30f93795/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 -> 6e0f1ca0eb16fbf37a6e5e5696159539bb44bf22 [2019-12-07 15:11:46,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:11:46,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:11:46,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:11:46,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:11:46,673 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:11:46,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2019-12-07 15:11:46,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/f71ff5918/59e23d88fb844564b7776809b36656ad/FLAGdbd677c64 [2019-12-07 15:11:47,117 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:11:47,117 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2019-12-07 15:11:47,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/f71ff5918/59e23d88fb844564b7776809b36656ad/FLAGdbd677c64 [2019-12-07 15:11:47,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/f71ff5918/59e23d88fb844564b7776809b36656ad [2019-12-07 15:11:47,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:11:47,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:11:47,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:11:47,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:11:47,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:11:47,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d50c974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47, skipping insertion in model container [2019-12-07 15:11:47,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:11:47,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:11:47,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:11:47,258 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:11:47,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:11:47,319 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:11:47,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47 WrapperNode [2019-12-07 15:11:47,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:11:47,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:11:47,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:11:47,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:11:47,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:11:47,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:11:47,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:11:47,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:11:47,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... [2019-12-07 15:11:47,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:11:47,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:11:47,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:11:47,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:11:47,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:11:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:11:47,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:11:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:11:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:11:47,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:11:47,562 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:11:47,562 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 15:11:47,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:11:47 BoogieIcfgContainer [2019-12-07 15:11:47,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:11:47,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:11:47,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:11:47,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:11:47,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:11:47" (1/3) ... [2019-12-07 15:11:47,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adcee52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:11:47, skipping insertion in model container [2019-12-07 15:11:47,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:47" (2/3) ... [2019-12-07 15:11:47,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adcee52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:11:47, skipping insertion in model container [2019-12-07 15:11:47,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:11:47" (3/3) ... [2019-12-07 15:11:47,567 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2019-12-07 15:11:47,574 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:11:47,578 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:11:47,585 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:11:47,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:11:47,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:11:47,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:11:47,600 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:11:47,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:11:47,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:11:47,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:11:47,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:11:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 15:11:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 15:11:47,613 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:47,613 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:47,613 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2051024512, now seen corresponding path program 1 times [2019-12-07 15:11:47,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:11:47,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543130788] [2019-12-07 15:11:47,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:11:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:47,714 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 15:11:47,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543130788] [2019-12-07 15:11:47,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:11:47,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:11:47,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068500356] [2019-12-07 15:11:47,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:11:47,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:11:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:11:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:11:47,729 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 15:11:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:47,746 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-12-07 15:11:47,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:11:47,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 15:11:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:47,755 INFO L225 Difference]: With dead ends: 21 [2019-12-07 15:11:47,755 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 15:11:47,757 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 15:11:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 15:11:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 15:11:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:11:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 15:11:47,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-12-07 15:11:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:47,779 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 15:11:47,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:11:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 15:11:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 15:11:47,779 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:47,780 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:47,780 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1937685945, now seen corresponding path program 1 times [2019-12-07 15:11:47,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:11:47,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982606474] [2019-12-07 15:11:47,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:11:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:47,809 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 15:11:47,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982606474] [2019-12-07 15:11:47,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407087737] [2019-12-07 15:11:47,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:47,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:11:47,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:47,861 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 15:11:47,861 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:47,876 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 15:11:47,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619834701] [2019-12-07 15:11:47,892 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 15:11:47,892 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:11:47,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:11:47,900 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:11:47,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:11:48,207 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:11:48,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:11:48,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 10 [2019-12-07 15:11:48,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644500313] [2019-12-07 15:11:48,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:11:48,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:11:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:11:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:11:48,549 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 7 states. [2019-12-07 15:11:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:48,581 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-12-07 15:11:48,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 15:11:48,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 15:11:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:48,582 INFO L225 Difference]: With dead ends: 20 [2019-12-07 15:11:48,582 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 15:11:48,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:11:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 15:11:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 15:11:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 15:11:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 15:11:48,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-07 15:11:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:48,585 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 15:11:48,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:11:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-07 15:11:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 15:11:48,586 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:48,586 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:48,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:48,787 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:48,788 INFO L82 PathProgramCache]: Analyzing trace with hash 806895636, now seen corresponding path program 1 times [2019-12-07 15:11:48,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:11:48,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849549650] [2019-12-07 15:11:48,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:11:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:48,834 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 15:11:48,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849549650] [2019-12-07 15:11:48,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84369371] [2019-12-07 15:11:48,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:48,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:11:48,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:48,891 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 15:11:48,892 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:48,906 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 15:11:48,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270622217] [2019-12-07 15:11:48,908 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 15:11:48,908 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:11:48,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:11:48,909 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:11:48,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:11:49,195 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 15:11:49,584 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 15:11:49,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 15:11:49,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-12-07 15:11:49,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256980493] [2019-12-07 15:11:49,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:11:49,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:11:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:11:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 15:11:49,586 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-12-07 15:11:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:49,596 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-12-07 15:11:49,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:11:49,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 15:11:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:49,597 INFO L225 Difference]: With dead ends: 26 [2019-12-07 15:11:49,597 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 15:11:49,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 15:11:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 15:11:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 15:11:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 15:11:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 15:11:49,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-12-07 15:11:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:49,600 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 15:11:49,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:11:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-12-07 15:11:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 15:11:49,601 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:49,601 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:49,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:49,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -743208761, now seen corresponding path program 2 times [2019-12-07 15:11:49,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:11:49,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458605771] [2019-12-07 15:11:49,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:11:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:11:49,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458605771] [2019-12-07 15:11:49,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527703321] [2019-12-07 15:11:49,848 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:49,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 15:11:49,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:11:49,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 15:11:49,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 15:11:49,953 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:49,996 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3783bb7a [2019-12-07 15:11:49,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718061616] [2019-12-07 15:11:49,998 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 15:11:49,998 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 15:11:49,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 15:11:49,998 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 15:11:49,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 15:11:50,005 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3783bb7a 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 15:11:50,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 15:11:50,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 15:11:50,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047286708] [2019-12-07 15:11:50,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:11:50,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:11:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:11:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-12-07 15:11:50,008 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2019-12-07 15:11:50,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 15:11:50,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:50,209 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@3783bb7a 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 15:11:50,213 INFO L168 Benchmark]: Toolchain (without parser) took 3080.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 946.2 MB in the beginning and 941.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 113.2 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:50,214 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:11:50,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -159.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:50,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.50 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 15:11:50,216 INFO L168 Benchmark]: Boogie Preprocessor took 15.20 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:50,216 INFO L168 Benchmark]: RCFGBuilder took 204.36 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:50,217 INFO L168 Benchmark]: TraceAbstraction took 2647.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.5 MB in the end (delta: 134.5 MB). Peak memory consumption was 134.5 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:50,221 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 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 186.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -159.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.50 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.20 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 204.36 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2647.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.5 MB in the end (delta: 134.5 MB). Peak memory consumption was 134.5 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@3783bb7a de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3783bb7a: 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 15:11:51,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:11:51,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:11:51,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:11:51,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:11:51,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:11:51,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:11:51,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:11:51,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:11:51,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:11:51,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:11:51,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:11:51,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:11:51,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:11:51,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:11:51,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:11:51,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:11:51,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:11:51,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:11:51,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:11:51,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:11:51,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:11:51,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:11:51,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:11:51,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:11:51,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:11:51,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:11:51,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:11:51,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:11:51,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:11:51,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:11:51,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:11:51,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:11:51,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:11:51,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:11:51,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:11:51,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:11:51,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:11:51,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:11:51,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:11:51,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:11:51,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 15:11:51,659 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:11:51,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:11:51,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 15:11:51,660 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 15:11:51,661 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 15:11:51,661 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 15:11:51,661 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 15:11:51,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 15:11:51,661 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 15:11:51,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:11:51,662 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:11:51,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:11:51,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:11:51,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:11:51,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:11:51,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:11:51,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:11:51,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:11:51,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:11:51,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:11:51,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:11:51,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:11:51,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:11:51,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:11:51,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 15:11:51,667 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_1080f4f2-f439-4667-88fc-c33e30f93795/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 -> 6e0f1ca0eb16fbf37a6e5e5696159539bb44bf22 [2019-12-07 15:11:51,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:11:51,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:11:51,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:11:51,850 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:11:51,850 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:11:51,850 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2019-12-07 15:11:51,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/1d9dd31a6/74a38f499bca466c8d9c93168d783fff/FLAG9c15ce8b7 [2019-12-07 15:11:52,282 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:11:52,282 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2019-12-07 15:11:52,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/1d9dd31a6/74a38f499bca466c8d9c93168d783fff/FLAG9c15ce8b7 [2019-12-07 15:11:52,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/data/1d9dd31a6/74a38f499bca466c8d9c93168d783fff [2019-12-07 15:11:52,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:11:52,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:11:52,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:11:52,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:11:52,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:11:52,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0f9973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52, skipping insertion in model container [2019-12-07 15:11:52,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:11:52,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:11:52,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:11:52,795 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:11:52,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:11:52,822 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:11:52,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52 WrapperNode [2019-12-07 15:11:52,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:11:52,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:11:52,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:11:52,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:11:52,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:11:52,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:11:52,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:11:52,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:11:52,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... [2019-12-07 15:11:52,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:11:52,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:11:52,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:11:52,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:11:52,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 15:11:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:11:52,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:11:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:11:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:11:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 15:11:53,083 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:11:53,083 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 15:11:53,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:11:53 BoogieIcfgContainer [2019-12-07 15:11:53,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:11:53,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:11:53,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:11:53,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:11:53,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:11:52" (1/3) ... [2019-12-07 15:11:53,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:11:53, skipping insertion in model container [2019-12-07 15:11:53,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:11:52" (2/3) ... [2019-12-07 15:11:53,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c31c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:11:53, skipping insertion in model container [2019-12-07 15:11:53,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:11:53" (3/3) ... [2019-12-07 15:11:53,090 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2019-12-07 15:11:53,097 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:11:53,101 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:11:53,108 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:11:53,122 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:11:53,122 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:11:53,122 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:11:53,122 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:11:53,123 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:11:53,123 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:11:53,123 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:11:53,123 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:11:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 15:11:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 15:11:53,135 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:53,135 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:53,136 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash 254868323, now seen corresponding path program 1 times [2019-12-07 15:11:53,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 15:11:53,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125970651] [2019-12-07 15:11:53,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:53,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 15:11:53,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:53,202 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 15:11:53,202 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:53,204 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 15:11:53,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125970651] [2019-12-07 15:11:53,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:11:53,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 15:11:53,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829681003] [2019-12-07 15:11:53,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 15:11:53,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 15:11:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 15:11:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 15:11:53,219 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-07 15:11:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:53,230 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2019-12-07 15:11:53,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 15:11:53,231 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-12-07 15:11:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:53,237 INFO L225 Difference]: With dead ends: 31 [2019-12-07 15:11:53,237 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 15:11:53,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 15:11:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 15:11:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 15:11:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 15:11:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-12-07 15:11:53,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2019-12-07 15:11:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:53,263 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-12-07 15:11:53,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 15:11:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-12-07 15:11:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:11:53,264 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:53,264 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:53,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 15:11:53,465 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1105866364, now seen corresponding path program 1 times [2019-12-07 15:11:53,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 15:11:53,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304896793] [2019-12-07 15:11:53,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:53,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:11:53,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:53,531 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 15:11:53,531 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:53,538 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 15:11:53,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304896793] [2019-12-07 15:11:53,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:11:53,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 15:11:53,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632727414] [2019-12-07 15:11:53,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:11:53,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 15:11:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:11:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:11:53,540 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2019-12-07 15:11:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:53,554 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2019-12-07 15:11:53,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:11:53,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 15:11:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:53,555 INFO L225 Difference]: With dead ends: 25 [2019-12-07 15:11:53,556 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 15:11:53,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:11:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 15:11:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 15:11:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 15:11:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-12-07 15:11:53,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2019-12-07 15:11:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:53,559 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-12-07 15:11:53,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:11:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-12-07 15:11:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 15:11:53,560 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:53,560 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:53,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 15:11:53,761 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2061609756, now seen corresponding path program 1 times [2019-12-07 15:11:53,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 15:11:53,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044887699] [2019-12-07 15:11:53,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/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 15:11:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:53,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:11:53,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:11:53,846 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:11:53,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044887699] [2019-12-07 15:11:53,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682590544] [2019-12-07 15:11:53,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 15:11:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:53,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:11:53,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:11:53,945 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:11:53,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803104546] [2019-12-07 15:11:53,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:54,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:11:54,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,093 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2019-12-07 15:11:54,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2019-12-07 15:11:54,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142485921] [2019-12-07 15:11:54,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:11:54,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 15:11:54,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:11:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 15:11:54,139 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 6 states. [2019-12-07 15:11:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:11:54,171 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-12-07 15:11:54,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:11:54,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 15:11:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:11:54,172 INFO L225 Difference]: With dead ends: 26 [2019-12-07 15:11:54,173 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 15:11:54,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 15:11:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 15:11:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-12-07 15:11:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 15:11:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-12-07 15:11:54,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2019-12-07 15:11:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:11:54,176 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-12-07 15:11:54,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:11:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-12-07 15:11:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 15:11:54,177 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:11:54,177 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:11:54,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:54,780 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:11:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:11:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1853246190, now seen corresponding path program 1 times [2019-12-07 15:11:54,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 15:11:54,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438989942] [2019-12-07 15:11:54,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 15:11:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:54,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:11:54,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,837 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438989942] [2019-12-07 15:11:54,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311055034] [2019-12-07 15:11:54,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 15:11:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:54,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:11:54,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,943 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:54,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211681716] [2019-12-07 15:11:54,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1080f4f2-f439-4667-88fc-c33e30f93795/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:11:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:11:54,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 15:11:54,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:11:55,014 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-12-07 15:11:55,014 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:11:55,023 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:11:55,023 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:11:55,023 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-12-07 15:11:55,051 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 15 treesize of output 15 [2019-12-07 15:11:55,052 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:11:55,061 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:11:55,061 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:11:55,062 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-12-07 15:11:55,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:11:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 15:11:55,143 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 15:11:55,237 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:11:55,237 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 82 treesize of output 78 [2019-12-07 15:11:55,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:11:55,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:11:55,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:11:55,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 15:11:55,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 15:11:55,247 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@170b4bf [2019-12-07 15:11:55,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-12-07 15:11:55,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 8 [2019-12-07 15:11:55,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566801663] [2019-12-07 15:11:55,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 15:11:55,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 15:11:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:11:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-12-07 15:11:55,248 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 8 states. [2019-12-07 15:11:55,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 15:11:55,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 15:11:55,852 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@170b4bf 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 15:11:55,856 INFO L168 Benchmark]: Toolchain (without parser) took 3193.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 952.4 MB in the beginning and 916.5 MB in the end (delta: 35.9 MB). Peak memory consumption was 154.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,857 INFO L168 Benchmark]: CDTParser took 0.13 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 15:11:55,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.36 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,858 INFO L168 Benchmark]: Boogie Preprocessor took 17.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,858 INFO L168 Benchmark]: RCFGBuilder took 193.41 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,859 INFO L168 Benchmark]: TraceAbstraction took 2770.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 916.5 MB in the end (delta: 172.7 MB). Peak memory consumption was 172.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:11:55,861 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 159.36 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.41 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2770.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 916.5 MB in the end (delta: 172.7 MB). Peak memory consumption was 172.7 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@170b4bf de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@170b4bf: 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...