./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF --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 5dbc8f54f9c446babb02937902a9e0651922ee3ad3469ce820281714b321626f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:55:53,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:55:53,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:55:53,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:55:53,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:55:53,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:55:53,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:55:53,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:55:53,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:55:53,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:55:53,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:55:53,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:55:53,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:55:53,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:55:53,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:55:53,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:55:53,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:55:53,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:55:53,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:55:53,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:55:53,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:55:53,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:55:53,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:55:53,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:55:53,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:55:53,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:55:53,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:55:53,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:55:53,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:55:53,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:55:53,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:55:53,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:55:53,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:55:53,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:55:53,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:55:53,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:55:53,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:55:53,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:55:53,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:55:53,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:55:53,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:55:53,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:55:53,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:55:53,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:55:53,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:55:53,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:55:53,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:55:53,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:55:53,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:55:53,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:55:53,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:55:53,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:55:53,710 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:55:53,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:55:53,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:55:53,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:55:53,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:55:53,711 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:55:53,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:55:53,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:55:53,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:55:53,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:55:53,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:55:53,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:55:53,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:55:53,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:55:53,714 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:55:53,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:55:53,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:55:53,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:55:53,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:55:53,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:55:53,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:55:53,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:53,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:55:53,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:55:53,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:55:53,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:55:53,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:55:53,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:55:53,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:55:53,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:55:53,719 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_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dbc8f54f9c446babb02937902a9e0651922ee3ad3469ce820281714b321626f [2021-11-12 22:55:54,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:55:54,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:55:54,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:55:54,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:55:54,100 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:55:54,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-simple/nested_1.c [2021-11-12 22:55:54,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/data/47e76c642/9b77caa7e7a5478c98748c8a13797432/FLAGf481a0ef9 [2021-11-12 22:55:54,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:55:54,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/sv-benchmarks/c/loop-simple/nested_1.c [2021-11-12 22:55:54,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/data/47e76c642/9b77caa7e7a5478c98748c8a13797432/FLAGf481a0ef9 [2021-11-12 22:55:55,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/data/47e76c642/9b77caa7e7a5478c98748c8a13797432 [2021-11-12 22:55:55,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:55:55,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:55:55,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:55,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:55:55,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:55:55,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7914df9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55, skipping insertion in model container [2021-11-12 22:55:55,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:55:55,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:55:55,296 WARN L228 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_da4240cb-3f0d-401e-91eb-92942646634b/sv-benchmarks/c/loop-simple/nested_1.c[676,689] [2021-11-12 22:55:55,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:55,308 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:55:55,320 WARN L228 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_da4240cb-3f0d-401e-91eb-92942646634b/sv-benchmarks/c/loop-simple/nested_1.c[676,689] [2021-11-12 22:55:55,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:55,333 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:55:55,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55 WrapperNode [2021-11-12 22:55:55,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:55,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:55,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:55:55,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:55:55,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:55,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:55:55,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:55:55,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:55:55,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:55:55,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:55:55,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:55:55,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:55:55,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (1/1) ... [2021-11-12 22:55:55,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:55,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:55,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:55:55,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:55:55,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:55:55,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:55:55,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:55:55,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:55:55,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:55:55,689 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:55:55,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:55 BoogieIcfgContainer [2021-11-12 22:55:55,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:55:55,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:55:55,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:55:55,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:55:55,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:55:55" (1/3) ... [2021-11-12 22:55:55,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b273e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:55, skipping insertion in model container [2021-11-12 22:55:55,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:55" (2/3) ... [2021-11-12 22:55:55,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b273e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:55, skipping insertion in model container [2021-11-12 22:55:55,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:55" (3/3) ... [2021-11-12 22:55:55,706 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.c [2021-11-12 22:55:55,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:55:55,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:55:55,774 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:55:55,785 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:55:55,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:55:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 22:55:55,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:55,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 22:55:55,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1848580, now seen corresponding path program 1 times [2021-11-12 22:55:55,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:55,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882208009] [2021-11-12 22:55:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:55,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:56,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882208009] [2021-11-12 22:55:56,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882208009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:56,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:56,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:55:56,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965205205] [2021-11-12 22:55:56,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:56,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:55:56,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:55:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:55:56,128 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:56,170 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 22:55:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-12 22:55:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:56,182 INFO L225 Difference]: With dead ends: 13 [2021-11-12 22:55:56,183 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 22:55:56,186 INFO L932 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 [2021-11-12 22:55:56,193 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:56,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 22.40ms Time] [2021-11-12 22:55:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 22:55:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 22:55:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 22:55:56,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 22:55:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:56,241 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 22:55:56,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 22:55:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:55:56,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:56,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:55:56,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:55:56,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash 57200258, now seen corresponding path program 1 times [2021-11-12 22:55:56,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:55:56,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903428676] [2021-11-12 22:55:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:56,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:55:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:56,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:55:56,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903428676] [2021-11-12 22:55:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903428676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:56,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707650572] [2021-11-12 22:55:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:56,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:55:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:56,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:55:56,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:55:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:56,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:56,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707650572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:56,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473593343] [2021-11-12 22:55:56,520 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:55:56,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:55:56,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:55:56,530 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:55:56,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:55:56,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:55:56,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:55:56,566 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:55:56,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:55:56,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-12 22:55:56,593 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 22:55:56,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:55:56,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:55:56,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:55:56,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:55:56,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:56,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 22:55:56,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:55:56,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:55:56,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:55:56,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:56,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:56,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-12 22:55:56,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:55:56,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-12 22:55:56,787 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.1 percent of original size [2021-11-12 22:55:56,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-12 22:55:56,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:56,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:56,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:55:57,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-12 22:55:57,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:55:57,151 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-11-12 22:55:57,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 22:55:57,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:55:57,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:55:57,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:55:57,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 7 [2021-11-12 22:55:57,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139077418] [2021-11-12 22:55:57,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:55:57,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:57,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:55:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:57,376 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:57,394 INFO L93 Difference]: Finished difference Result 9 states and 11 transitions. [2021-11-12 22:55:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 22:55:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:57,395 INFO L225 Difference]: With dead ends: 9 [2021-11-12 22:55:57,395 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:55:57,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:57,397 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:57,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.27ms Time] [2021-11-12 22:55:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:55:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:55:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:55:57,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-11-12 22:55:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:57,400 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:55:57,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:55:57,400 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:55:57,403 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:55:57,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:57,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-12 22:55:57,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:55:57,629 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 22:55:57,631 INFO L858 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2021-11-12 22:55:57,632 INFO L854 garLoopResultBuilder]: At program point L19-3(lines 19 21) the Hoare annotation is: (or (< |ULTIMATE.start_main_~a~0#1| 6) (= 6 |ULTIMATE.start_main_~a~0#1|)) [2021-11-12 22:55:57,632 INFO L858 garLoopResultBuilder]: For program point L19-4(lines 15 26) no Hoare annotation was computed. [2021-11-12 22:55:57,632 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 22:55:57,633 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2021-11-12 22:55:57,633 INFO L861 garLoopResultBuilder]: At program point L22-1(lines 22 24) the Hoare annotation is: true [2021-11-12 22:55:57,638 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-12 22:55:57,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:55:57,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:55:57 BoogieIcfgContainer [2021-11-12 22:55:57,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:55:57,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:55:57,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:55:57,654 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:55:57,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:55" (3/4) ... [2021-11-12 22:55:57,657 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 22:55:57,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-12 22:55:57,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-12 22:55:57,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-12 22:55:57,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 22:55:57,701 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 22:55:57,704 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:55:57,705 INFO L158 Benchmark]: Toolchain (without parser) took 2658.61ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 59.5MB in the beginning and 65.5MB in the end (delta: -6.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,705 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:55:57,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.96ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 70.8MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,706 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.43ms. Allocated memory is still 94.4MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,706 INFO L158 Benchmark]: Boogie Preprocessor took 18.73ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 68.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:55:57,707 INFO L158 Benchmark]: RCFGBuilder took 313.08ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 59.3MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,707 INFO L158 Benchmark]: TraceAbstraction took 1954.91ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 58.7MB in the beginning and 67.6MB in the end (delta: -8.8MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,708 INFO L158 Benchmark]: Witness Printer took 50.88ms. Allocated memory is still 121.6MB. Free memory was 67.6MB in the beginning and 65.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:55:57,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.96ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 70.8MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.43ms. Allocated memory is still 94.4MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.73ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 68.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 313.08ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 59.3MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1954.91ms. Allocated memory was 94.4MB in the beginning and 121.6MB in the end (delta: 27.3MB). Free memory was 58.7MB in the beginning and 67.6MB in the end (delta: -8.8MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. * Witness Printer took 50.88ms. Allocated memory is still 121.6MB. Free memory was 67.6MB in the beginning and 65.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 23]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 35.68ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 26.66ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 3 mSDtfsCounter, 19 mSolverCounterSat, 0.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 8 HoareAnnotationTreeSize, 2 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 SizeOfPredicates, 0 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: a < 6 || 6 == a RESULT: Ultimate proved your program to be correct! [2021-11-12 22:55:57,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da4240cb-3f0d-401e-91eb-92942646634b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE