./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ncompf.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_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ncompf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/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 c18491048038839cd2bebabad98c6df95c5a2283 .............................................................................................................................................................................................................................................................................. 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 07:27:18,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:27:18,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:27:18,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:27:18,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:27:18,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:27:18,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:27:18,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:27:18,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:27:18,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:27:18,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:27:18,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:27:18,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:27:18,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:27:18,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:27:18,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:27:18,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:27:18,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:27:18,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:27:18,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:27:18,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:27:18,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:27:18,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:27:18,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:27:18,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:27:18,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:27:18,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:27:18,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:27:18,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:27:18,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:27:18,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:27:18,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:27:18,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:27:18,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:27:18,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:27:18,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:27:18,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:27:18,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:27:18,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:27:18,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:27:18,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:27:18,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:27:18,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:27:18,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:27:18,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:27:18,150 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:27:18,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:27:18,150 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:27:18,151 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:27:18,151 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:27:18,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:27:18,152 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:27:18,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:27:18,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:27:18,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:27:18,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:27:18,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:27:18,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:27:18,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:27:18,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:27:18,155 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_cd5950f3-b7da-4fe4-9961-15212376d773/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18491048038839cd2bebabad98c6df95c5a2283 [2020-12-09 07:27:18,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:27:18,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:27:18,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:27:18,336 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:27:18,336 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:27:18,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/../../sv-benchmarks/c/array-fpi/ncompf.c [2020-12-09 07:27:18,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/data/f85ed0b3d/4889876c2ac441a09ce28dbc0b2e163b/FLAGa48c9ca7b [2020-12-09 07:27:18,734 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:27:18,734 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/sv-benchmarks/c/array-fpi/ncompf.c [2020-12-09 07:27:18,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/data/f85ed0b3d/4889876c2ac441a09ce28dbc0b2e163b/FLAGa48c9ca7b [2020-12-09 07:27:18,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/data/f85ed0b3d/4889876c2ac441a09ce28dbc0b2e163b [2020-12-09 07:27:18,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:27:18,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:27:18,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:27:18,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:27:18,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:27:18,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5fee08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18, skipping insertion in model container [2020-12-09 07:27:18,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:27:18,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:27:18,894 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_cd5950f3-b7da-4fe4-9961-15212376d773/sv-benchmarks/c/array-fpi/ncompf.c[589,602] [2020-12-09 07:27:18,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:27:18,915 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:27:18,924 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_cd5950f3-b7da-4fe4-9961-15212376d773/sv-benchmarks/c/array-fpi/ncompf.c[589,602] [2020-12-09 07:27:18,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:27:18,941 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:27:18,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18 WrapperNode [2020-12-09 07:27:18,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:27:18,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:27:18,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:27:18,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:27:18,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:27:18,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:27:18,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:27:18,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:27:18,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... [2020-12-09 07:27:18,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:27:18,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:27:18,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:27:18,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:27:18,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/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 07:27:19,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:27:19,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 07:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 07:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:27:19,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:27:19,309 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:27:19,309 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 07:27:19,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:19 BoogieIcfgContainer [2020-12-09 07:27:19,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:27:19,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:27:19,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:27:19,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:27:19,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:27:18" (1/3) ... [2020-12-09 07:27:19,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b57472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:19, skipping insertion in model container [2020-12-09 07:27:19,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:18" (2/3) ... [2020-12-09 07:27:19,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b57472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:19, skipping insertion in model container [2020-12-09 07:27:19,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:19" (3/3) ... [2020-12-09 07:27:19,319 INFO L111 eAbstractionObserver]: Analyzing ICFG ncompf.c [2020-12-09 07:27:19,330 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:27:19,333 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:27:19,343 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:27:19,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:27:19,367 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:27:19,367 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:27:19,367 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:27:19,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:27:19,368 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:27:19,368 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:27:19,368 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:27:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 07:27:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:27:19,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:27:19,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:27:19,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:27:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:27:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash -16623148, now seen corresponding path program 1 times [2020-12-09 07:27:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:27:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990494834] [2020-12-09 07:27:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:27:19,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:27:19,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998243214] [2020-12-09 07:27:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/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 [2020-12-09 07:27:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:27:19,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:27:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:27:19,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:27:19,575 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:27:19,575 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:27:19,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 07:27:19,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:27:19 BoogieIcfgContainer [2020-12-09 07:27:19,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:27:19,798 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:27:19,799 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:27:19,799 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:27:19,799 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:19" (3/4) ... [2020-12-09 07:27:19,801 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:27:19,836 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cd5950f3-b7da-4fe4-9961-15212376d773/bin/utaipan/witness.graphml [2020-12-09 07:27:19,836 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:27:19,839 INFO L168 Benchmark]: Toolchain (without parser) took 1080.94 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 55.7 MB in the beginning and 43.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,839 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 42.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:27:19,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.89 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 55.7 MB in the beginning and 100.4 MB in the end (delta: -44.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,841 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.83 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 98.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,841 INFO L168 Benchmark]: Boogie Preprocessor took 24.41 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 97.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,842 INFO L168 Benchmark]: RCFGBuilder took 317.38 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 71.6 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,842 INFO L168 Benchmark]: TraceAbstraction took 485.69 ms. Allocated memory is still 123.7 MB. Free memory was 71.1 MB in the beginning and 46.0 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,843 INFO L168 Benchmark]: Witness Printer took 38.17 ms. Allocated memory is still 123.7 MB. Free memory was 46.0 MB in the beginning and 43.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:27:19,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 42.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 183.89 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 55.7 MB in the beginning and 100.4 MB in the end (delta: -44.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.83 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 98.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.41 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 97.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 317.38 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 71.6 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 485.69 ms. Allocated memory is still 123.7 MB. Free memory was 71.1 MB in the beginning and 46.0 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 38.17 ms. Allocated memory is still 123.7 MB. Free memory was 46.0 MB in the beginning and 43.8 MB in the end (delta: 2.2 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 *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L35] i=1 VAL [N=1] [L35] COND FALSE !(i