./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e7a3bf93085b5e270d45bd0dc9d7e17d0c05479 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:22:29,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:29,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:29,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:29,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:29,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:29,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:29,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:29,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:29,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:29,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:29,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:29,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:29,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:29,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:29,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:29,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:29,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:29,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:30,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:30,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:30,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:30,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:30,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:30,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:30,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:30,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:30,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:30,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:30,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:30,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:30,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:30,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:30,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:30,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:30,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:30,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:30,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:30,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:30,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:30,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:30,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-10-22 11:22:30,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:30,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:30,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:30,023 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:30,023 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:30,023 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:30,023 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:30,024 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:30,024 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:30,024 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:30,024 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:30,025 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:30,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:22:30,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:22:30,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:30,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:30,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:30,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:30,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:30,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:30,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:30,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:30,035 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:30,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:30,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:30,036 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 8e7a3bf93085b5e270d45bd0dc9d7e17d0c05479 [2019-10-22 11:22:30,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:30,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:30,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:30,088 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:30,089 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:30,089 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2019-10-22 11:22:30,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/data/50bb5e2ea/5bba082cacb840f691884f35681eb264/FLAGd11d47021 [2019-10-22 11:22:30,587 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:30,588 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2019-10-22 11:22:30,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/data/50bb5e2ea/5bba082cacb840f691884f35681eb264/FLAGd11d47021 [2019-10-22 11:22:31,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/data/50bb5e2ea/5bba082cacb840f691884f35681eb264 [2019-10-22 11:22:31,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:31,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:31,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:31,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:31,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:31,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a956d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31, skipping insertion in model container [2019-10-22 11:22:31,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,127 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:31,155 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:31,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:31,486 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:31,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:31,560 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:31,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31 WrapperNode [2019-10-22 11:22:31,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:31,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:31,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:31,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:31,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:31,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:31,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:31,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:31,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:31,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:31,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:31,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:31,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:22:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:22:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:22:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:22:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:31,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:31,995 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:31,995 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 11:22:31,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:31 BoogieIcfgContainer [2019-10-22 11:22:31,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:31,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:31,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:32,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:32,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:31" (1/3) ... [2019-10-22 11:22:32,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e3105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:32, skipping insertion in model container [2019-10-22 11:22:32,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (2/3) ... [2019-10-22 11:22:32,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460e3105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:32, skipping insertion in model container [2019-10-22 11:22:32,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:31" (3/3) ... [2019-10-22 11:22:32,004 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2019-10-22 11:22:32,012 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:32,019 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-10-22 11:22:32,028 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-10-22 11:22:32,043 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:32,044 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:22:32,044 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:32,044 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:32,044 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:32,044 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:32,044 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:32,044 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-22 11:22:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:22:32,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,062 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,064 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2019-10-22 11:22:32,073 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:32,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719032754] [2019-10-22 11:22:32,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719032754] [2019-10-22 11:22:32,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:32,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:22:32,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278777018] [2019-10-22 11:22:32,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:22:32,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:22:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:22:32,228 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-22 11:22:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:32,293 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-10-22 11:22:32,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:22:32,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-10-22 11:22:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:32,303 INFO L225 Difference]: With dead ends: 25 [2019-10-22 11:22:32,303 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:22:32,304 INFO L600 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 [2019-10-22 11:22:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:22:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 11:22:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:22:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-10-22 11:22:32,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2019-10-22 11:22:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:32,333 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-10-22 11:22:32,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:22:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-10-22 11:22:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:22:32,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,334 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,334 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2019-10-22 11:22:32,334 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:32,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135908040] [2019-10-22 11:22:32,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135908040] [2019-10-22 11:22:32,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:32,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:22:32,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634365637] [2019-10-22 11:22:32,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:32,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:32,407 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2019-10-22 11:22:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:32,494 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-10-22 11:22:32,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:32,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-10-22 11:22:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:32,496 INFO L225 Difference]: With dead ends: 40 [2019-10-22 11:22:32,496 INFO L226 Difference]: Without dead ends: 40 [2019-10-22 11:22:32,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-22 11:22:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2019-10-22 11:22:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 11:22:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-10-22 11:22:32,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 7 [2019-10-22 11:22:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:32,503 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-10-22 11:22:32,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-10-22 11:22:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:22:32,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,504 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,505 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 629680180, now seen corresponding path program 1 times [2019-10-22 11:22:32,505 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:32,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88966616] [2019-10-22 11:22:32,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88966616] [2019-10-22 11:22:32,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:32,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:22:32,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380153311] [2019-10-22 11:22:32,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:22:32,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:22:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:22:32,678 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 6 states. [2019-10-22 11:22:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:32,797 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-10-22 11:22:32,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:22:32,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-10-22 11:22:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:32,798 INFO L225 Difference]: With dead ends: 26 [2019-10-22 11:22:32,798 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 11:22:32,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:22:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 11:22:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-22 11:22:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:22:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-22 11:22:32,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 10 [2019-10-22 11:22:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:32,802 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-22 11:22:32,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:22:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-22 11:22:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:22:32,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,803 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,803 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash 629680181, now seen corresponding path program 1 times [2019-10-22 11:22:32,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:32,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556039167] [2019-10-22 11:22:32,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556039167] [2019-10-22 11:22:32,850 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:32,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:22:32,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717555913] [2019-10-22 11:22:32,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:22:32,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:22:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:32,851 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 4 states. [2019-10-22 11:22:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:32,869 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-22 11:22:32,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:32,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-22 11:22:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:32,870 INFO L225 Difference]: With dead ends: 26 [2019-10-22 11:22:32,870 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 11:22:32,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:22:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 11:22:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-22 11:22:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:22:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-22 11:22:32,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2019-10-22 11:22:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:32,874 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-22 11:22:32,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:22:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-22 11:22:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:22:32,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,874 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,875 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2019-10-22 11:22:32,875 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:32,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244129545] [2019-10-22 11:22:32,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:32,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244129545] [2019-10-22 11:22:32,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781855164] [2019-10-22 11:22:32,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/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 [2019-10-22 11:22:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:22:33,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,061 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:33,085 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-22 11:22:33,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 10 [2019-10-22 11:22:33,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149443195] [2019-10-22 11:22:33,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:22:33,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:22:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:22:33,086 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2019-10-22 11:22:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:33,117 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-22 11:22:33,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:22:33,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-22 11:22:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:33,118 INFO L225 Difference]: With dead ends: 43 [2019-10-22 11:22:33,119 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 11:22:33,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:22:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 11:22:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2019-10-22 11:22:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 11:22:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-22 11:22:33,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 11 [2019-10-22 11:22:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,122 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-22 11:22:33,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:22:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-22 11:22:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:22:33,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,124 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:33,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:33,326 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:22:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2019-10-22 11:22:33,326 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:33,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063113186] [2019-10-22 11:22:33,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:33,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:33,394 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:22:33,394 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:22:33,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:33 BoogieIcfgContainer [2019-10-22 11:22:33,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:33,418 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:33,418 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:33,418 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:33,419 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:31" (3/4) ... [2019-10-22 11:22:33,421 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:22:33,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_69a6d51a-a18c-4e73-9e6f-580a9d8ad85e/bin/utaipan/witness.graphml [2019-10-22 11:22:33,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:33,472 INFO L168 Benchmark]: Toolchain (without parser) took 2358.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.1 MB in the beginning and 981.6 MB in the end (delta: -42.5 MB). Peak memory consumption was 88.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:33,473 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:33,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 447.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:33,474 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:33,474 INFO L168 Benchmark]: Boogie Preprocessor took 48.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:33,474 INFO L168 Benchmark]: RCFGBuilder took 344.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:33,475 INFO L168 Benchmark]: TraceAbstraction took 1420.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.2 MB in the end (delta: 91.7 MB). Peak memory consumption was 91.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:33,475 INFO L168 Benchmark]: Witness Printer took 50.09 ms. Allocated memory is still 1.2 GB. Free memory was 988.2 MB in the beginning and 981.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:33,481 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 447.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 344.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1420.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 988.2 MB in the end (delta: 91.7 MB). Peak memory consumption was 91.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.09 ms. Allocated memory is still 1.2 GB. Free memory was 988.2 MB in the beginning and 981.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 539]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L526] int length = __VERIFIER_nondet_int(); [L527] int n = __VERIFIER_nondet_int(); [L528] int c = __VERIFIER_nondet_int(); [L529] COND FALSE !(length < 1) [L532] COND TRUE n < 1 [L533] n = 1 [L535] char* nondetArea = (char*) __builtin_alloca (n * sizeof(char)); [L537] int i = 0; [L537] COND TRUE i < length [L539] nondetArea[i] = __VERIFIER_nondet_char() [L537] i++ [L537] COND TRUE i < length [L539] nondetArea[i] = __VERIFIER_nondet_char() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 5 error locations. Result: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 202 SDslu, 128 SDs, 0 SdLazy, 118 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 1976 SizeOfPredicates, 2 NumberOfNonLiveVariables, 49 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 5/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...