./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 1b1751fe95f9cf655681429038c1cde9e9c074e8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 16:56:18,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:56:18,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:56:18,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:56:18,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:56:18,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:56:18,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:56:18,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:56:18,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:56:18,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:56:18,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:56:18,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:56:18,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:56:18,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:56:18,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:56:18,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:56:18,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:56:18,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:56:18,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:56:18,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:56:18,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:56:18,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:56:18,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:56:18,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:56:18,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:56:18,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:56:18,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:56:18,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:56:18,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:56:18,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:56:18,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:56:18,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:56:18,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:56:18,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:56:18,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:56:18,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:56:18,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:56:18,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:56:18,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:56:18,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:56:18,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:56:18,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 16:56:18,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:56:18,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:56:18,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:56:18,097 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:56:18,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:56:18,097 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:56:18,098 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:56:18,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:56:18,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:56:18,099 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:56:18,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:56:18,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:56:18,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 16:56:18,100 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:56:18,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:56:18,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:56:18,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:56:18,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:56:18,102 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:56:18,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:56:18,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:56:18,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:56:18,102 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_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 -> 1b1751fe95f9cf655681429038c1cde9e9c074e8 [2019-12-07 16:56:18,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:56:18,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:56:18,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:56:18,232 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:56:18,233 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:56:18,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-12-07 16:56:18,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/data/2c0a83f88/8cb2abae75b14efea3aab4afc9104674/FLAGe19d76206 [2019-12-07 16:56:18,683 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:56:18,683 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-12-07 16:56:18,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/data/2c0a83f88/8cb2abae75b14efea3aab4afc9104674/FLAGe19d76206 [2019-12-07 16:56:18,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/data/2c0a83f88/8cb2abae75b14efea3aab4afc9104674 [2019-12-07 16:56:18,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:56:18,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:56:18,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:56:18,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:56:18,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:56:18,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aaa2f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18, skipping insertion in model container [2019-12-07 16:56:18,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:56:18,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:56:18,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:56:18,870 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:56:18,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:56:18,891 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:56:18,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18 WrapperNode [2019-12-07 16:56:18,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:56:18,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:56:18,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:56:18,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:56:18,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:56:18,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:56:18,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:56:18,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:56:18,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... [2019-12-07 16:56:18,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:56:18,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:56:18,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:56:18,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:56:18,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 16:56:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:56:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:56:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:56:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:56:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-07 16:56:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:56:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:56:19,168 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:56:19,168 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 16:56:19,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:19 BoogieIcfgContainer [2019-12-07 16:56:19,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:56:19,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:56:19,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:56:19,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:56:19,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:56:18" (1/3) ... [2019-12-07 16:56:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7477b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:56:19, skipping insertion in model container [2019-12-07 16:56:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:18" (2/3) ... [2019-12-07 16:56:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7477b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:56:19, skipping insertion in model container [2019-12-07 16:56:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:19" (3/3) ... [2019-12-07 16:56:19,176 INFO L109 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2019-12-07 16:56:19,182 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:56:19,187 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-12-07 16:56:19,194 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-12-07 16:56:19,207 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:56:19,207 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 16:56:19,208 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:56:19,208 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:56:19,208 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:56:19,208 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:56:19,208 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:56:19,208 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:56:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-12-07 16:56:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 16:56:19,221 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:19,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 16:56:19,222 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 72397, now seen corresponding path program 1 times [2019-12-07 16:56:19,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:19,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848521682] [2019-12-07 16:56:19,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:19,336 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 16:56:19,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848521682] [2019-12-07 16:56:19,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:19,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 16:56:19,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108175811] [2019-12-07 16:56:19,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:56:19,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:56:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:56:19,352 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-12-07 16:56:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:19,374 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-12-07 16:56:19,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:56:19,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 16:56:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:19,381 INFO L225 Difference]: With dead ends: 11 [2019-12-07 16:56:19,381 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 16:56:19,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 16:56:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 16:56:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 16:56:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 16:56:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 16:56:19,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2019-12-07 16:56:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:19,402 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 16:56:19,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:56:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 16:56:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 16:56:19,402 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:19,402 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 16:56:19,403 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash 72398, now seen corresponding path program 1 times [2019-12-07 16:56:19,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:19,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649975124] [2019-12-07 16:56:19,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:19,437 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 16:56:19,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649975124] [2019-12-07 16:56:19,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:19,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 16:56:19,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628678406] [2019-12-07 16:56:19,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:56:19,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:56:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:56:19,439 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2019-12-07 16:56:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:19,453 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 16:56:19,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:56:19,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 16:56:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:19,454 INFO L225 Difference]: With dead ends: 12 [2019-12-07 16:56:19,454 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 16:56:19,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 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 16:56:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 16:56:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 16:56:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 16:56:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 16:56:19,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2019-12-07 16:56:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:19,458 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 16:56:19,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:56:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 16:56:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:56:19,458 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:19,459 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-12-07 16:56:19,459 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 69605553, now seen corresponding path program 1 times [2019-12-07 16:56:19,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:19,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855850793] [2019-12-07 16:56:19,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:19,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855850793] [2019-12-07 16:56:19,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515965120] [2019-12-07 16:56:19,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 16:56:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:19,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 16:56:19,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:56:19,587 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:56:19,587 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-12-07 16:56:19,588 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:56:19,605 INFO L614 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2019-12-07 16:56:19,606 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 16:56:19,606 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2019-12-07 16:56:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:19,611 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:56:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:19,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109886451] [2019-12-07 16:56:19,653 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2019-12-07 16:56:19,653 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:56:19,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:56:19,663 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:56:19,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:56:19,954 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:56:20,133 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:56:20,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:56:20,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2019-12-07 16:56:20,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779115647] [2019-12-07 16:56:20,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 16:56:20,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:56:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:56:20,135 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2019-12-07 16:56:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:20,206 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-12-07 16:56:20,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:56:20,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-12-07 16:56:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:20,207 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:56:20,208 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:56:20,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:56:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:56:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2019-12-07 16:56:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 16:56:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-12-07 16:56:20,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2019-12-07 16:56:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:20,211 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-12-07 16:56:20,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 16:56:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-12-07 16:56:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:56:20,211 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:20,212 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-12-07 16:56:20,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:56:20,413 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash -849168678, now seen corresponding path program 1 times [2019-12-07 16:56:20,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:20,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091195535] [2019-12-07 16:56:20,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 16:56:20,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091195535] [2019-12-07 16:56:20,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:20,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:56:20,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017538573] [2019-12-07 16:56:20,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:56:20,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:56:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:56:20,473 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-12-07 16:56:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:20,495 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-12-07 16:56:20,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:56:20,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 16:56:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:20,497 INFO L225 Difference]: With dead ends: 22 [2019-12-07 16:56:20,498 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 16:56:20,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:56:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 16:56:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-12-07 16:56:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 16:56:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-12-07 16:56:20,502 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2019-12-07 16:56:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:20,503 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-12-07 16:56:20,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:56:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-12-07 16:56:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:56:20,504 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:20,504 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-12-07 16:56:20,505 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash -849169369, now seen corresponding path program 1 times [2019-12-07 16:56:20,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:20,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319912486] [2019-12-07 16:56:20,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 16:56:20,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319912486] [2019-12-07 16:56:20,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:20,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:56:20,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937520956] [2019-12-07 16:56:20,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:56:20,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:20,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:56:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:56:20,561 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2019-12-07 16:56:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:20,586 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-12-07 16:56:20,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:56:20,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:56:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:20,587 INFO L225 Difference]: With dead ends: 21 [2019-12-07 16:56:20,588 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 16:56:20,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:56:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 16:56:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 16:56:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 16:56:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-12-07 16:56:20,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 8 [2019-12-07 16:56:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:20,591 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-12-07 16:56:20,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:56:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-12-07 16:56:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:56:20,592 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:20,592 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-12-07 16:56:20,592 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -849169370, now seen corresponding path program 1 times [2019-12-07 16:56:20,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:20,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097789205] [2019-12-07 16:56:20,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:20,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097789205] [2019-12-07 16:56:20,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255649543] [2019-12-07 16:56:20,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 16:56:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:20,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:56:20,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:56:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:20,664 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:56:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:20,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111935712] [2019-12-07 16:56:20,686 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 16:56:20,687 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:56:20,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:56:20,687 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:56:20,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:56:20,918 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:56:21,073 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:56:21,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:56:21,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2019-12-07 16:56:21,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281815993] [2019-12-07 16:56:21,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:56:21,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:56:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:56:21,075 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 9 states. [2019-12-07 16:56:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:21,103 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-12-07 16:56:21,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:56:21,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2019-12-07 16:56:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:21,104 INFO L225 Difference]: With dead ends: 24 [2019-12-07 16:56:21,104 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 16:56:21,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:56:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 16:56:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-12-07 16:56:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 16:56:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-12-07 16:56:21,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2019-12-07 16:56:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:21,106 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-12-07 16:56:21,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:56:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-12-07 16:56:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 16:56:21,107 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:21,107 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2019-12-07 16:56:21,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:56:21,307 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1464187430, now seen corresponding path program 2 times [2019-12-07 16:56:21,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:21,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640111605] [2019-12-07 16:56:21,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:21,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640111605] [2019-12-07 16:56:21,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:21,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 16:56:21,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793321026] [2019-12-07 16:56:21,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:56:21,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:21,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:56:21,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:56:21,373 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2019-12-07 16:56:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:21,393 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-12-07 16:56:21,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:56:21,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 16:56:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:21,394 INFO L225 Difference]: With dead ends: 22 [2019-12-07 16:56:21,394 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 16:56:21,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:56:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 16:56:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 16:56:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 16:56:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-12-07 16:56:21,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2019-12-07 16:56:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:21,397 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 16:56:21,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:56:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-12-07 16:56:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 16:56:21,397 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:21,397 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2019-12-07 16:56:21,397 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:21,397 INFO L82 PathProgramCache]: Analyzing trace with hash 623284378, now seen corresponding path program 2 times [2019-12-07 16:56:21,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:21,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128678162] [2019-12-07 16:56:21,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:21,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128678162] [2019-12-07 16:56:21,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116921463] [2019-12-07 16:56:21,442 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/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 16:56:21,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-07 16:56:21,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:56:21,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:56:21,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:56:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:21,490 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:56:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:21,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145805349] [2019-12-07 16:56:21,537 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 16:56:21,537 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:56:21,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:56:21,538 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:56:21,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:56:21,708 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:56:21,847 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:56:21,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:56:21,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2019-12-07 16:56:21,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805184751] [2019-12-07 16:56:21,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:56:21,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:56:21,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:56:21,849 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 13 states. [2019-12-07 16:56:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:21,873 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-12-07 16:56:21,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:56:21,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-07 16:56:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:21,873 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:56:21,873 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:56:21,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-07 16:56:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:56:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-07 16:56:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 16:56:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 16:56:21,876 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2019-12-07 16:56:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:21,876 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 16:56:21,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:56:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 16:56:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 16:56:21,877 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:21,877 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2019-12-07 16:56:22,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:56:22,078 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:56:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash 139507982, now seen corresponding path program 3 times [2019-12-07 16:56:22,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:22,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676243865] [2019-12-07 16:56:22,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:56:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:56:22,159 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:56:22,159 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:56:22,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:56:22 BoogieIcfgContainer [2019-12-07 16:56:22,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:56:22,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:56:22,180 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:56:22,180 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:56:22,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:19" (3/4) ... [2019-12-07 16:56:22,182 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:56:22,216 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ef213dd0-e698-45ea-ac1e-66678ab6955e/bin/utaipan/witness.graphml [2019-12-07 16:56:22,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:56:22,217 INFO L168 Benchmark]: Toolchain (without parser) took 3518.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 940.9 MB in the beginning and 842.1 MB in the end (delta: 98.8 MB). Peak memory consumption was 211.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:22,217 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:56:22,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.36 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -166.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:22,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.58 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 16:56:22,218 INFO L168 Benchmark]: Boogie Preprocessor took 15.73 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 16:56:22,218 INFO L168 Benchmark]: RCFGBuilder took 238.09 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:22,218 INFO L168 Benchmark]: TraceAbstraction took 3009.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 849.0 MB in the end (delta: 230.9 MB). Peak memory consumption was 230.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:22,218 INFO L168 Benchmark]: Witness Printer took 35.62 ms. Allocated memory is still 1.1 GB. Free memory was 849.0 MB in the beginning and 842.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:22,220 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 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 192.36 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -166.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.58 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 15.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 238.09 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3009.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 849.0 MB in the end (delta: 230.9 MB). Peak memory consumption was 230.9 MB. Max. memory is 11.5 GB. * Witness Printer took 35.62 ms. Allocated memory is still 1.1 GB. Free memory was 849.0 MB in the beginning and 842.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] int *array = alloca(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND FALSE !(i < 10) [L14] return array; [L19] int *numbers = getNumbers(); [L21] int i = 0; [L21] COND TRUE i < 10 [L22] numbers + i - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. Result: UNSAFE, OverallTime: 2.9s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 84 SDslu, 78 SDs, 0 SdLazy, 150 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=8, 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, 8 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 5139 SizeOfPredicates, 5 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 28/154 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...