./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs4f.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_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI --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 7ac7e9ad2bcd8f9b205fc7710f870fc639029596 ...................................................................................................................................................................................................................................................................................................................................................... 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 [2021-10-11 02:27:34,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:34,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:34,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:34,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:34,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:34,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:34,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:34,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:34,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:34,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:34,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:34,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:34,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:34,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:34,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:34,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:34,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:34,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:34,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:34,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:34,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:34,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:34,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:34,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:34,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:34,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:34,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:34,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:34,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:34,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:34,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:34,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:34,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:34,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:34,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:34,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:34,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:34,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:34,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:34,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:34,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:27:34,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:34,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:34,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:34,604 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:34,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:34,604 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:34,605 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:34,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:34,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:34,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:34,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:34,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:34,614 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:34,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:34,614 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:34,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:34,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:34,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:34,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:34,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:34,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:34,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:34,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:34,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:34,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:34,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:34,618 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:34,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:34,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:34,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:34,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:34,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:34,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:34,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:34,622 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:34,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:34,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:34,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:34,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:34,623 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_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac7e9ad2bcd8f9b205fc7710f870fc639029596 [2021-10-11 02:27:34,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:34,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:34,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:34,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:34,952 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:34,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/brs4f.c [2021-10-11 02:27:35,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/data/e982eabb9/4d388cf5e4df415ca487061011b11fba/FLAG042d84158 [2021-10-11 02:27:35,449 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:35,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/sv-benchmarks/c/array-fpi/brs4f.c [2021-10-11 02:27:35,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/data/e982eabb9/4d388cf5e4df415ca487061011b11fba/FLAG042d84158 [2021-10-11 02:27:35,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/data/e982eabb9/4d388cf5e4df415ca487061011b11fba [2021-10-11 02:27:35,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:35,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:35,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:35,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:35,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:35,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:35" (1/1) ... [2021-10-11 02:27:35,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b645f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:35, skipping insertion in model container [2021-10-11 02:27:35,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:35" (1/1) ... [2021-10-11 02:27:35,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:35,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:36,066 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/sv-benchmarks/c/array-fpi/brs4f.c[588,601] [2021-10-11 02:27:36,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:36,104 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:36,115 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/sv-benchmarks/c/array-fpi/brs4f.c[588,601] [2021-10-11 02:27:36,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:36,138 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:36,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36 WrapperNode [2021-10-11 02:27:36,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:36,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:36,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:36,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:36,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:36,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:36,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:36,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:36,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... [2021-10-11 02:27:36,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:36,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:36,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:36,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:36,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:27:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:27:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:36,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:27:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:27:36,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:36,760 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:27:36,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:36 BoogieIcfgContainer [2021-10-11 02:27:36,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:36,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:36,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:36,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:36,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:35" (1/3) ... [2021-10-11 02:27:36,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59475876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:36, skipping insertion in model container [2021-10-11 02:27:36,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:36" (2/3) ... [2021-10-11 02:27:36,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59475876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:36, skipping insertion in model container [2021-10-11 02:27:36,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:36" (3/3) ... [2021-10-11 02:27:36,773 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4f.c [2021-10-11 02:27:36,787 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:36,800 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:27:36,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:27:36,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:36,834 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:36,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:36,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:36,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:36,834 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:36,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:36,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:27:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:27:36,850 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:36,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:27:36,851 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1441693108, now seen corresponding path program 1 times [2021-10-11 02:27:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:36,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545912472] [2021-10-11 02:27:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:37,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545912472] [2021-10-11 02:27:37,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:37,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:37,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979607729] [2021-10-11 02:27:37,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:37,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:37,062 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:27:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:37,102 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:27:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:37,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:27:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:37,113 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:27:37,122 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:27:37,125 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 [2021-10-11 02:27:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:27:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:27:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:27:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:27:37,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:27:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:37,158 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:27:37,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:27:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:27:37,159 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:37,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:37,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:37,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1744495143, now seen corresponding path program 1 times [2021-10-11 02:27:37,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:37,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385651525] [2021-10-11 02:27:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:27:37,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385651525] [2021-10-11 02:27:37,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:37,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:27:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957675988] [2021-10-11 02:27:37,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:37,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:37,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:37,308 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:27:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:37,356 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:27:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:37,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:27:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:37,358 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:27:37,359 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:27:37,359 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 [2021-10-11 02:27:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:27:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:27:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:27:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:27:37,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:27:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:37,366 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:27:37,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:27:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:27:37,375 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:37,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:37,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:37,376 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1755182165, now seen corresponding path program 1 times [2021-10-11 02:27:37,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:37,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852673819] [2021-10-11 02:27:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:37,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:37,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:37,561 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:27:37,561 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:27:37,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:37,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:37 BoogieIcfgContainer [2021-10-11 02:27:37,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:37,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:37,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:37,606 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:37,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:36" (3/4) ... [2021-10-11 02:27:37,609 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:27:37,660 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ba1872-d483-4746-91cf-d031faecac86/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:37,660 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:37,662 INFO L168 Benchmark]: Toolchain (without parser) took 1802.89 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 53.9 MB in the beginning and 87.8 MB in the end (delta: -33.8 MB). Peak memory consumption was 13.8 kB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,663 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:37,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.35 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 53.7 MB in the beginning and 97.5 MB in the end (delta: -43.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.63 ms. Allocated memory is still 121.6 MB. Free memory was 97.5 MB in the beginning and 96.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,665 INFO L168 Benchmark]: Boogie Preprocessor took 46.67 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 94.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,665 INFO L168 Benchmark]: RCFGBuilder took 530.33 ms. Allocated memory is still 121.6 MB. Free memory was 94.7 MB in the beginning and 70.3 MB in the end (delta: 24.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,666 INFO L168 Benchmark]: TraceAbstraction took 839.78 ms. Allocated memory is still 121.6 MB. Free memory was 69.6 MB in the beginning and 89.8 MB in the end (delta: -20.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:37,666 INFO L168 Benchmark]: Witness Printer took 55.04 ms. Allocated memory is still 121.6 MB. Free memory was 89.8 MB in the beginning and 87.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:37,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.35 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 53.7 MB in the beginning and 97.5 MB in the end (delta: -43.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.63 ms. Allocated memory is still 121.6 MB. Free memory was 97.5 MB in the beginning and 96.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.67 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 94.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 530.33 ms. Allocated memory is still 121.6 MB. Free memory was 94.7 MB in the beginning and 70.3 MB in the end (delta: 24.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 839.78 ms. Allocated memory is still 121.6 MB. Free memory was 69.6 MB in the beginning and 89.8 MB in the end (delta: -20.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 55.04 ms. Allocated memory is still 121.6 MB. Free memory was 89.8 MB in the beginning and 87.8 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