./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2f.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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/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 d4908701bc858db819ac584f6da9ed504c4033b1 ......................................................................................................................................................................................................................................................................................................................................................................................... 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 02:26:04,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:04,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:04,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:04,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:04,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:04,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:04,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:04,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:04,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:04,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:04,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:04,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:04,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:04,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:04,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:04,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:04,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:04,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:04,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:04,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:04,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:04,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:04,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:04,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:04,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:04,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:04,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:04,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:04,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:04,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:04,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:04,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:04,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:04,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:04,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:04,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:04,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:04,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:04,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:04,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:04,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:04,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:04,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:04,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:04,715 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:04,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:04,715 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:04,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:04,715 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:04,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:04,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:04,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:04,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:04,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:04,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:04,718 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:04,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:04,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:04,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:04,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:04,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:04,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:04,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:04,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:04,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:04,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:04,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:04,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:04,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:04,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:04,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:04,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:04,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:04,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:04,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:04,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:04,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:04,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:04,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:04,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:04,726 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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4908701bc858db819ac584f6da9ed504c4033b1 [2021-10-11 02:26:05,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:05,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:05,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:05,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:05,137 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:05,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/res2f.c [2021-10-11 02:26:05,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/data/28623b3e4/98816f7c0c2847da89f4efc063bc5d08/FLAGc2b4197ba [2021-10-11 02:26:05,782 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:05,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/sv-benchmarks/c/array-fpi/res2f.c [2021-10-11 02:26:05,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/data/28623b3e4/98816f7c0c2847da89f4efc063bc5d08/FLAGc2b4197ba [2021-10-11 02:26:06,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/data/28623b3e4/98816f7c0c2847da89f4efc063bc5d08 [2021-10-11 02:26:06,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:06,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:06,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:06,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:06,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:06,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28002e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06, skipping insertion in model container [2021-10-11 02:26:06,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:06,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:06,342 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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/sv-benchmarks/c/array-fpi/res2f.c[588,601] [2021-10-11 02:26:06,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:06,372 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:06,385 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_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/sv-benchmarks/c/array-fpi/res2f.c[588,601] [2021-10-11 02:26:06,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:06,412 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:06,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06 WrapperNode [2021-10-11 02:26:06,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:06,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:06,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:06,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:06,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:06,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:06,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:06,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:06,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:06,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:06,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:06,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:06,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/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 02:26:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:06,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:06,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:07,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:07,359 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-11 02:26:07,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:07 BoogieIcfgContainer [2021-10-11 02:26:07,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:07,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:07,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:07,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:07,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:06" (1/3) ... [2021-10-11 02:26:07,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6a0b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:07, skipping insertion in model container [2021-10-11 02:26:07,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (2/3) ... [2021-10-11 02:26:07,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6a0b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:07, skipping insertion in model container [2021-10-11 02:26:07,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:07" (3/3) ... [2021-10-11 02:26:07,372 INFO L111 eAbstractionObserver]: Analyzing ICFG res2f.c [2021-10-11 02:26:07,386 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:07,390 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:07,402 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:07,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:07,438 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:07,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:07,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:07,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:07,439 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:07,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:07,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-10-11 02:26:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:07,462 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:07,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:07,464 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash -121576232, now seen corresponding path program 1 times [2021-10-11 02:26:07,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:07,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389647620] [2021-10-11 02:26:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:07,748 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 02:26:07,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389647620] [2021-10-11 02:26:07,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:07,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249218259] [2021-10-11 02:26:07,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:07,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:07,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:07,776 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2021-10-11 02:26:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:07,891 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2021-10-11 02:26:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:07,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-10-11 02:26:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:07,902 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:26:07,910 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:26:07,913 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 02:26:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:26:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:26:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:26:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-10-11 02:26:07,953 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2021-10-11 02:26:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:07,954 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-10-11 02:26:07,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-10-11 02:26:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:26:07,955 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:07,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:07,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:07,956 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1625940306, now seen corresponding path program 1 times [2021-10-11 02:26:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:07,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756027718] [2021-10-11 02:26:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:08,093 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 02:26:08,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756027718] [2021-10-11 02:26:08,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:08,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:08,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334708307] [2021-10-11 02:26:08,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:08,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:08,102 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand 4 states. [2021-10-11 02:26:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:08,187 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2021-10-11 02:26:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:08,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:26:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:08,191 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:26:08,191 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:26:08,192 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 02:26:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:26:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:26:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:26:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-11 02:26:08,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2021-10-11 02:26:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:08,206 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-11 02:26:08,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-11 02:26:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:08,208 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:08,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:08,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:08,210 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash -984404389, now seen corresponding path program 1 times [2021-10-11 02:26:08,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:08,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346506136] [2021-10-11 02:26:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:08,309 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:08,380 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:08,420 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:08,420 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:08,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:08,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:08 BoogieIcfgContainer [2021-10-11 02:26:08,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:08,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:08,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:08,498 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:08,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:07" (3/4) ... [2021-10-11 02:26:08,501 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:26:08,579 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ffbb1d-3586-4f12-a644-6f80ba855bc4/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:08,581 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:08,584 INFO L168 Benchmark]: Toolchain (without parser) took 2451.35 ms. Allocated memory was 79.7 MB in the beginning and 123.7 MB in the end (delta: 44.0 MB). Free memory was 42.6 MB in the beginning and 76.9 MB in the end (delta: -34.3 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:08,584 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:08,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.11 ms. Allocated memory was 79.7 MB in the beginning and 123.7 MB in the end (delta: 44.0 MB). Free memory was 42.4 MB in the beginning and 99.7 MB in the end (delta: -57.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:08,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.84 ms. Allocated memory is still 123.7 MB. Free memory was 99.1 MB in the beginning and 97.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:08,589 INFO L168 Benchmark]: Boogie Preprocessor took 28.47 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 96.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:08,590 INFO L168 Benchmark]: RCFGBuilder took 880.43 ms. Allocated memory is still 123.7 MB. Free memory was 96.4 MB in the beginning and 65.5 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:08,590 INFO L168 Benchmark]: TraceAbstraction took 1132.76 ms. Allocated memory is still 123.7 MB. Free memory was 65.0 MB in the beginning and 79.8 MB in the end (delta: -14.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:08,591 INFO L168 Benchmark]: Witness Printer took 84.92 ms. Allocated memory is still 123.7 MB. Free memory was 79.8 MB in the beginning and 76.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:08,594 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.11 ms. Allocated memory was 79.7 MB in the beginning and 123.7 MB in the end (delta: 44.0 MB). Free memory was 42.4 MB in the beginning and 99.7 MB in the end (delta: -57.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.84 ms. Allocated memory is still 123.7 MB. Free memory was 99.1 MB in the beginning and 97.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.47 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 96.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 880.43 ms. Allocated memory is still 123.7 MB. Free memory was 96.4 MB in the beginning and 65.5 MB in the end (delta: 30.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1132.76 ms. Allocated memory is still 123.7 MB. Free memory was 65.0 MB in the beginning and 79.8 MB in the end (delta: -14.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 84.92 ms. Allocated memory is still 123.7 MB. Free memory was 79.8 MB in the beginning and 76.9 MB in the end (delta: 2.9 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); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 1 [L34] i=0 VAL [N=1] [L34] COND TRUE i