./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res1f.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_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/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_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res1f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/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_8371e784-080e-4aed-8b00-3ec131d7d2e2/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 369569e0b7f2b195bb71c415efaac5a81f6515aa ........................................................................................................................................................................................................................................................................................................................................................................ 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 02:32:33,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:33,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:33,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:33,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:33,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:33,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:33,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:33,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:33,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:33,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:33,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:33,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:33,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:33,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:33,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:33,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:33,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:33,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:33,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:33,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:33,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:33,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:33,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:33,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:33,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:33,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:33,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:33,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:33,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:33,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:33,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:33,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:33,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:33,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:33,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:33,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:33,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:33,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:33,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:33,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:33,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:32:33,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:33,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:33,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:33,510 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:33,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:33,511 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:33,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:33,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:33,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:33,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:33,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:33,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:33,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:33,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:33,514 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:33,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:33,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:33,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:33,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:33,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:33,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:32:33,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:33,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:32:33,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:33,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:33,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:32:33,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:33,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:32:33,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:33,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:33,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:33,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:33,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:33,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:32:33,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:33,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:33,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:32:33,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:33,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:33,521 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_8371e784-080e-4aed-8b00-3ec131d7d2e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 369569e0b7f2b195bb71c415efaac5a81f6515aa [2021-10-11 02:32:33,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:33,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:33,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:33,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:33,834 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:33,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/res1f.c [2021-10-11 02:32:33,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/data/9a25ab5a0/902da6d93bca4a14af9ee3f1c5a2fb71/FLAG2920fb8bb [2021-10-11 02:32:34,328 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:34,331 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/sv-benchmarks/c/array-fpi/res1f.c [2021-10-11 02:32:34,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/data/9a25ab5a0/902da6d93bca4a14af9ee3f1c5a2fb71/FLAG2920fb8bb [2021-10-11 02:32:34,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/data/9a25ab5a0/902da6d93bca4a14af9ee3f1c5a2fb71 [2021-10-11 02:32:34,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:34,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:34,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:34,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:34,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:34,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:34,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb03fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34, skipping insertion in model container [2021-10-11 02:32:34,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:34,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:34,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:34,907 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_8371e784-080e-4aed-8b00-3ec131d7d2e2/sv-benchmarks/c/array-fpi/res1f.c[588,601] [2021-10-11 02:32:34,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:34,939 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:34,952 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_8371e784-080e-4aed-8b00-3ec131d7d2e2/sv-benchmarks/c/array-fpi/res1f.c[588,601] [2021-10-11 02:32:34,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:34,976 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:34,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34 WrapperNode [2021-10-11 02:32:34,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:34,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:34,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:34,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:34,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:34,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:35,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:35,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:35,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:35,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:35,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:35,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:35,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:35,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:35,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/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 02:32:35,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:32:35,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:32:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:35,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:35,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:35,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:32:35,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:35,611 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-11 02:32:35,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35 BoogieIcfgContainer [2021-10-11 02:32:35,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:35,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:35,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:35,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:35,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:34" (1/3) ... [2021-10-11 02:32:35,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a5e3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:35, skipping insertion in model container [2021-10-11 02:32:35,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34" (2/3) ... [2021-10-11 02:32:35,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a5e3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:35, skipping insertion in model container [2021-10-11 02:32:35,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35" (3/3) ... [2021-10-11 02:32:35,634 INFO L111 eAbstractionObserver]: Analyzing ICFG res1f.c [2021-10-11 02:32:35,648 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:35,651 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:32:35,662 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:32:35,685 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:35,686 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:32:35,686 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:35,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:35,686 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:35,686 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:35,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:35,687 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:32:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:32:35,704 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:35,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:35,705 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash -957904410, now seen corresponding path program 1 times [2021-10-11 02:32:35,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:35,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345035093] [2021-10-11 02:32:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:35,945 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 02:32:35,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345035093] [2021-10-11 02:32:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:35,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741225453] [2021-10-11 02:32:35,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:35,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:35,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:35,982 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-10-11 02:32:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:36,067 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-10-11 02:32:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:36,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:32:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:36,077 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:32:36,082 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:32:36,087 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 02:32:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:32:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:32:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:32:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2021-10-11 02:32:36,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2021-10-11 02:32:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:36,117 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-10-11 02:32:36,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2021-10-11 02:32:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:32:36,118 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:36,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:36,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:36,119 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1352645, now seen corresponding path program 1 times [2021-10-11 02:32:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:36,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016618916] [2021-10-11 02:32:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:36,200 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 02:32:36,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016618916] [2021-10-11 02:32:36,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:36,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:32:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177071799] [2021-10-11 02:32:36,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:36,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:36,205 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 4 states. [2021-10-11 02:32:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:36,241 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2021-10-11 02:32:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:36,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:32:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:36,243 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:32:36,243 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:32:36,244 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 02:32:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:32:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:32:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:32:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-11 02:32:36,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-10-11 02:32:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:36,249 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-11 02:32:36,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-11 02:32:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:32:36,250 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:36,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:36,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:36,251 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:36,252 INFO L82 PathProgramCache]: Analyzing trace with hash 552358577, now seen corresponding path program 1 times [2021-10-11 02:32:36,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:36,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756199326] [2021-10-11 02:32:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:36,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:36,434 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:36,464 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:32:36,465 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:32:36,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:36,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:36 BoogieIcfgContainer [2021-10-11 02:32:36,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:36,500 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:36,500 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:36,501 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:36,501 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35" (3/4) ... [2021-10-11 02:32:36,503 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:32:36,571 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8371e784-080e-4aed-8b00-3ec131d7d2e2/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:36,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:36,573 INFO L168 Benchmark]: Toolchain (without parser) took 1879.86 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 70.3 MB in the beginning and 85.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,574 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:36,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.53 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 85.4 MB in the end (delta: -15.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.93 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 83.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:36,575 INFO L168 Benchmark]: Boogie Preprocessor took 60.16 ms. Allocated memory is still 111.1 MB. Free memory was 83.6 MB in the beginning and 82.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,576 INFO L168 Benchmark]: RCFGBuilder took 537.78 ms. Allocated memory is still 111.1 MB. Free memory was 82.4 MB in the beginning and 56.7 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,576 INFO L168 Benchmark]: TraceAbstraction took 884.43 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 56.3 MB in the beginning and 87.8 MB in the end (delta: -31.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:36,577 INFO L168 Benchmark]: Witness Printer took 71.68 ms. Allocated memory is still 134.2 MB. Free memory was 87.8 MB in the beginning and 85.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.53 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 85.4 MB in the end (delta: -15.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.93 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 83.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.16 ms. Allocated memory is still 111.1 MB. Free memory was 83.6 MB in the beginning and 82.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.78 ms. Allocated memory is still 111.1 MB. Free memory was 82.4 MB in the beginning and 56.7 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 884.43 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 56.3 MB in the beginning and 87.8 MB in the end (delta: -31.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 71.68 ms. Allocated memory is still 134.2 MB. Free memory was 87.8 MB in the beginning and 85.7 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); [L30] int *b = malloc(sizeof(int)*N); [L32] sum[0] = 1 [L33] i=0 VAL [N=1] [L33] COND TRUE i