./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/McCarthy91-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/McCarthy91-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0 --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 2a5dd5c1c64cd1875ba800cc2db6d1da955f2d2f519c1964ff87558bc42b9b4c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:59:18,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:59:18,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:59:18,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:59:18,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:59:18,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:59:18,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:59:18,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:59:18,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:59:18,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:59:18,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:59:18,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:59:18,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:59:18,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:59:18,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:59:18,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:59:18,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:59:18,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:59:18,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:59:18,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:59:18,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:59:18,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:59:18,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:59:18,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:59:18,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:59:18,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:59:18,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:59:18,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:59:18,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:59:18,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:59:18,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:59:18,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:59:18,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:59:18,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:59:18,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:59:18,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:59:18,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:59:18,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:59:18,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:59:18,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:59:18,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:59:18,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:59:18,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:59:18,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:59:18,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:59:18,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:59:18,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:59:18,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:59:18,769 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:59:18,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:59:18,769 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:59:18,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:59:18,771 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:59:18,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:59:18,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:59:18,772 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:59:18,772 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:59:18,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:59:18,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:59:18,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:59:18,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:59:18,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:59:18,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:59:18,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:59:18,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:59:18,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:59:18,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:59:18,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:59:18,778 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:59:18,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:59:18,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:59:18,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:59:18,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:59:18,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:59:18,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:59:18,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:59:18,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:59:18,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:59:18,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:59:18,781 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:59:18,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:59:18,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:59:18,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:59:18,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5dd5c1c64cd1875ba800cc2db6d1da955f2d2f519c1964ff87558bc42b9b4c [2022-11-16 19:59:19,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:59:19,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:59:19,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:59:19,148 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:59:19,151 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:59:19,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/recursive/McCarthy91-2.c [2022-11-16 19:59:19,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/data/4c262f36b/bb298c3bb0e54fd7b785594f1b863115/FLAG35848078f [2022-11-16 19:59:19,751 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:59:19,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/sv-benchmarks/c/recursive/McCarthy91-2.c [2022-11-16 19:59:19,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/data/4c262f36b/bb298c3bb0e54fd7b785594f1b863115/FLAG35848078f [2022-11-16 19:59:20,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/data/4c262f36b/bb298c3bb0e54fd7b785594f1b863115 [2022-11-16 19:59:20,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:59:20,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:59:20,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:59:20,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:59:20,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:59:20,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3543ac64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20, skipping insertion in model container [2022-11-16 19:59:20,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:59:20,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:59:20,487 WARN L229 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_068062d9-bdad-45ca-a78a-bffcd1cfff9f/sv-benchmarks/c/recursive/McCarthy91-2.c[749,762] [2022-11-16 19:59:20,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:59:20,502 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:59:20,523 WARN L229 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_068062d9-bdad-45ca-a78a-bffcd1cfff9f/sv-benchmarks/c/recursive/McCarthy91-2.c[749,762] [2022-11-16 19:59:20,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:59:20,541 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:59:20,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20 WrapperNode [2022-11-16 19:59:20,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:59:20,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:59:20,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:59:20,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:59:20,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,584 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-11-16 19:59:20,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:59:20,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:59:20,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:59:20,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:59:20,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:59:20,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:59:20,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:59:20,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:59:20,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:59:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:20,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:59:20,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:59:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:59:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:59:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:59:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:59:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2022-11-16 19:59:20,698 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2022-11-16 19:59:20,776 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:59:20,779 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:59:20,961 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:59:20,985 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:59:20,986 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 19:59:20,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:59:20 BoogieIcfgContainer [2022-11-16 19:59:20,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:59:20,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:59:20,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:59:20,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:59:20,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:59:20" (1/3) ... [2022-11-16 19:59:20,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539af875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:20, skipping insertion in model container [2022-11-16 19:59:20,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (2/3) ... [2022-11-16 19:59:21,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539af875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:20, skipping insertion in model container [2022-11-16 19:59:21,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:59:20" (3/3) ... [2022-11-16 19:59:21,002 INFO L112 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2022-11-16 19:59:21,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:59:21,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:59:21,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:59:21,134 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@569e9942, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:59:21,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:59:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 19:59:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:59:21,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:21,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:21,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2045921670, now seen corresponding path program 1 times [2022-11-16 19:59:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:21,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131676110] [2022-11-16 19:59:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:21,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131676110] [2022-11-16 19:59:21,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131676110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:21,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:59:21,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030918719] [2022-11-16 19:59:21,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:59:21,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:59:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:59:21,882 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 19:59:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:22,073 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-16 19:59:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:59:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-11-16 19:59:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:22,085 INFO L225 Difference]: With dead ends: 26 [2022-11-16 19:59:22,086 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:59:22,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:22,093 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:22,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:59:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 19:59:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 19:59:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 19:59:22,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-16 19:59:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:22,161 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 19:59:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 19:59:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 19:59:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 19:59:22,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:22,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:22,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:59:22,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1718131711, now seen corresponding path program 1 times [2022-11-16 19:59:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:22,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789983763] [2022-11-16 19:59:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:59:22,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789983763] [2022-11-16 19:59:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789983763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602704614] [2022-11-16 19:59:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:22,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:22,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:22,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:59:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:22,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:59:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:59:22,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:23,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602704614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:23,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532635750] [2022-11-16 19:59:23,591 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-16 19:59:23,592 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:23,596 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:59:23,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:23,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 15 [2022-11-16 19:59:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857884640] [2022-11-16 19:59:23,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:23,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:59:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:59:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:59:23,616 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 19:59:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:23,893 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-16 19:59:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:59:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2022-11-16 19:59:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:23,903 INFO L225 Difference]: With dead ends: 16 [2022-11-16 19:59:23,903 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 19:59:23,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:59:23,906 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:23,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:59:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 19:59:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 19:59:23,911 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) [2022-11-16 19:59:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 19:59:23,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-11-16 19:59:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:23,912 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 19:59:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 19:59:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 19:59:23,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 19:59:23,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 19:59:23,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:24,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 19:59:24,160 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 19:59:24,160 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-11-16 19:59:24,160 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 19:59:24,160 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2022-11-16 19:59:24,160 INFO L902 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-11-16 19:59:24,160 INFO L899 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2022-11-16 19:59:24,161 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 34) the Hoare annotation is: true [2022-11-16 19:59:24,161 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2022-11-16 19:59:24,161 INFO L902 garLoopResultBuilder]: At program point f91ENTRY(lines 17 23) the Hoare annotation is: true [2022-11-16 19:59:24,161 INFO L899 garLoopResultBuilder]: For program point f91FINAL(lines 17 23) no Hoare annotation was computed. [2022-11-16 19:59:24,162 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (<= f91_~x 100) (<= f91_~x |f91_#in~x|) (<= |f91_#in~x| f91_~x)) [2022-11-16 19:59:24,162 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2022-11-16 19:59:24,162 INFO L895 garLoopResultBuilder]: At program point L21-2(line 21) the Hoare annotation is: (and (<= |f91_#t~ret4| 101) (<= f91_~x 100) (<= f91_~x |f91_#in~x|) (<= |f91_#in~x| f91_~x)) [2022-11-16 19:59:24,162 INFO L899 garLoopResultBuilder]: For program point f91EXIT(lines 17 23) no Hoare annotation was computed. [2022-11-16 19:59:24,162 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 22) no Hoare annotation was computed. [2022-11-16 19:59:24,163 INFO L899 garLoopResultBuilder]: For program point L21-3(line 21) no Hoare annotation was computed. [2022-11-16 19:59:24,167 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 19:59:24,169 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 19:59:24,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 07:59:24 BoogieIcfgContainer [2022-11-16 19:59:24,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 19:59:24,179 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 19:59:24,179 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 19:59:24,179 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 19:59:24,180 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:59:20" (3/4) ... [2022-11-16 19:59:24,183 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 19:59:24,191 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure f91 [2022-11-16 19:59:24,195 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-16 19:59:24,195 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-16 19:59:24,195 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-16 19:59:24,195 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 19:59:24,230 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 19:59:24,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 19:59:24,231 INFO L158 Benchmark]: Toolchain (without parser) took 4089.55ms. Allocated memory is still 125.8MB. Free memory was 92.3MB in the beginning and 57.1MB in the end (delta: 35.2MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,232 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 77.6MB. Free memory was 52.1MB in the beginning and 52.1MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:59:24,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.99ms. Allocated memory is still 125.8MB. Free memory was 92.1MB in the beginning and 102.9MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,233 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.33ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 101.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,233 INFO L158 Benchmark]: Boogie Preprocessor took 32.92ms. Allocated memory is still 125.8MB. Free memory was 101.7MB in the beginning and 100.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:59:24,233 INFO L158 Benchmark]: RCFGBuilder took 369.61ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 90.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,234 INFO L158 Benchmark]: TraceAbstraction took 3185.71ms. Allocated memory is still 125.8MB. Free memory was 90.1MB in the beginning and 59.1MB in the end (delta: 30.9MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,234 INFO L158 Benchmark]: Witness Printer took 52.02ms. Allocated memory is still 125.8MB. Free memory was 59.1MB in the beginning and 57.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:59:24,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 77.6MB. Free memory was 52.1MB in the beginning and 52.1MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.99ms. Allocated memory is still 125.8MB. Free memory was 92.1MB in the beginning and 102.9MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.33ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 101.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.92ms. Allocated memory is still 125.8MB. Free memory was 101.7MB in the beginning and 100.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 369.61ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 90.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3185.71ms. Allocated memory is still 125.8MB. Free memory was 90.1MB in the beginning and 59.1MB in the end (delta: 30.9MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. * Witness Printer took 52.02ms. Allocated memory is still 125.8MB. Free memory was 59.1MB in the beginning and 57.1MB in the end (delta: 2.1MB). 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: 32]: 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 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 53 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 190 IncrementalHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 15 mSDtfsCounter, 190 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 16, 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, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 26 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 334 SizeOfPredicates, 5 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 25/36 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: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-16 19:59:24,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_068062d9-bdad-45ca-a78a-bffcd1cfff9f/bin/utaipan-Xvt2sAort0/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