./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ms3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ms3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d41fc8f45d6677615383aa59c803c310c6c67fce .................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:11:42,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:11:42,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:11:42,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:11:42,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:11:42,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:11:42,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:11:42,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:11:42,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:11:42,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:11:42,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:11:42,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:11:42,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:11:42,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:11:42,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:11:42,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:11:42,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:11:42,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:11:42,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:11:42,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:11:42,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:11:42,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:11:42,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:11:42,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:11:42,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:11:42,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:11:42,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:11:42,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:11:42,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:11:42,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:11:42,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:11:42,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:11:42,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:11:42,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:11:42,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:11:42,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:11:42,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:11:42,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:11:42,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:11:42,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:11:42,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:11:42,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:11:42,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:11:42,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:11:42,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:11:42,114 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:11:42,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:11:42,114 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:11:42,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:11:42,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:11:42,115 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:11:42,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:11:42,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:11:42,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:11:42,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:11:42,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:11:42,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:11:42,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:11:42,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:11:42,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:11:42,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:11:42,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:11:42,119 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d41fc8f45d6677615383aa59c803c310c6c67fce [2020-12-09 09:11:42,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:11:42,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:11:42,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:11:42,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:11:42,310 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:11:42,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/../../sv-benchmarks/c/array-fpi/ms3f.c [2020-12-09 09:11:42,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/data/6687c2667/4d1b06375d49401793d3971f0b794ed0/FLAGf6d7db2a0 [2020-12-09 09:11:42,718 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:11:42,719 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/sv-benchmarks/c/array-fpi/ms3f.c [2020-12-09 09:11:42,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/data/6687c2667/4d1b06375d49401793d3971f0b794ed0/FLAGf6d7db2a0 [2020-12-09 09:11:42,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/data/6687c2667/4d1b06375d49401793d3971f0b794ed0 [2020-12-09 09:11:42,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:11:42,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:11:42,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:11:42,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:11:42,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:11:42,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24930624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42, skipping insertion in model container [2020-12-09 09:11:42,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:11:42,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:11:42,862 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/sv-benchmarks/c/array-fpi/ms3f.c[587,600] [2020-12-09 09:11:42,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:11:42,885 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:11:42,896 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/sv-benchmarks/c/array-fpi/ms3f.c[587,600] [2020-12-09 09:11:42,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:11:42,911 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:11:42,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42 WrapperNode [2020-12-09 09:11:42,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:11:42,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:11:42,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:11:42,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:11:42,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:11:42,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:11:42,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:11:42,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:11:42,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... [2020-12-09 09:11:42,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:11:42,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:11:42,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:11:42,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:11:42,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/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 [2020-12-09 09:11:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:11:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:11:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 09:11:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:11:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:11:43,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:11:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:11:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:11:43,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:11:43,240 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 09:11:43,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:11:43 BoogieIcfgContainer [2020-12-09 09:11:43,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:11:43,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:11:43,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:11:43,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:11:43,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:11:42" (1/3) ... [2020-12-09 09:11:43,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1114f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:11:43, skipping insertion in model container [2020-12-09 09:11:43,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:11:42" (2/3) ... [2020-12-09 09:11:43,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1114f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:11:43, skipping insertion in model container [2020-12-09 09:11:43,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:11:43" (3/3) ... [2020-12-09 09:11:43,248 INFO L111 eAbstractionObserver]: Analyzing ICFG ms3f.c [2020-12-09 09:11:43,257 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:11:43,260 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:11:43,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:11:43,283 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:11:43,283 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:11:43,283 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:11:43,284 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:11:43,284 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:11:43,284 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:11:43,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:11:43,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:11:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 09:11:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:11:43,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:43,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:11:43,296 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1591516051, now seen corresponding path program 1 times [2020-12-09 09:11:43,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:11:43,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422210475] [2020-12-09 09:11:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:11:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:11:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:11:43,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422210475] [2020-12-09 09:11:43,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:11:43,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:11:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669374628] [2020-12-09 09:11:43,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:11:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:11:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:11:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:11:43,463 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-09 09:11:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:43,491 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-09 09:11:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:11:43,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:11:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:43,501 INFO L225 Difference]: With dead ends: 18 [2020-12-09 09:11:43,501 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 09:11:43,504 INFO L677 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 [2020-12-09 09:11:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 09:11:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 09:11:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 09:11:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-09 09:11:43,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-09 09:11:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:43,534 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-09 09:11:43,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:11:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-09 09:11:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:11:43,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:43,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:11:43,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:11:43,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2099668623, now seen corresponding path program 1 times [2020-12-09 09:11:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:11:43,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803441173] [2020-12-09 09:11:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:11:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:11:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:11:43,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803441173] [2020-12-09 09:11:43,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:11:43,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:11:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872321142] [2020-12-09 09:11:43,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:11:43,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:11:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:11:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:11:43,606 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-12-09 09:11:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:43,626 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 09:11:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:11:43,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:11:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:43,627 INFO L225 Difference]: With dead ends: 12 [2020-12-09 09:11:43,627 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 09:11:43,628 INFO L677 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 [2020-12-09 09:11:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 09:11:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 09:11:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 09:11:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 09:11:43,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-12-09 09:11:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:43,631 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 09:11:43,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:11:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 09:11:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:11:43,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:43,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:11:43,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:11:43,633 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -665260167, now seen corresponding path program 1 times [2020-12-09 09:11:43,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:11:43,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540507941] [2020-12-09 09:11:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:11:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:11:43,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:11:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:11:43,716 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:11:43,736 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:11:43,737 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:11:43,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:11:43,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:11:43 BoogieIcfgContainer [2020-12-09 09:11:43,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:11:43,762 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:11:43,762 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:11:43,762 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:11:43,762 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:11:43" (3/4) ... [2020-12-09 09:11:43,764 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 09:11:43,804 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d78bf765-24ac-42b3-a1ef-ebe4f40b56f7/bin/utaipan/witness.graphml [2020-12-09 09:11:43,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:11:43,806 INFO L168 Benchmark]: Toolchain (without parser) took 1068.81 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 61.9 MB in the beginning and 70.9 MB in the end (delta: -9.0 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:43,806 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 98.6 MB. Free memory is still 78.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:43,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.93 ms. Allocated memory is still 98.6 MB. Free memory was 61.8 MB in the beginning and 74.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:43,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.43 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 73.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:43,808 INFO L168 Benchmark]: Boogie Preprocessor took 22.34 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 926.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:43,808 INFO L168 Benchmark]: RCFGBuilder took 281.82 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 49.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:43,809 INFO L168 Benchmark]: TraceAbstraction took 518.22 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 48.2 MB in the beginning and 73.0 MB in the end (delta: -24.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:43,809 INFO L168 Benchmark]: Witness Printer took 42.22 ms. Allocated memory is still 119.5 MB. Free memory was 73.0 MB in the beginning and 70.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:43,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 98.6 MB. Free memory is still 78.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.93 ms. Allocated memory is still 98.6 MB. Free memory was 61.8 MB in the beginning and 74.7 MB in the end (delta: -12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.43 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 73.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.34 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 926.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 281.82 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 49.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 518.22 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 48.2 MB in the beginning and 73.0 MB in the end (delta: -24.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 42.22 ms. Allocated memory is still 119.5 MB. Free memory was 73.0 MB in the beginning and 70.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i