./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs --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 11d6d848444c2f9afc2eba3aace7d6b72c4d182e1953661ba8811794c092f478 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:18:17,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:18:17,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:18:17,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:18:17,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:18:17,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:18:17,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:18:17,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:18:17,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:18:17,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:18:17,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:18:17,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:18:17,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:18:17,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:18:17,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:18:17,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:18:17,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:18:17,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:18:17,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:18:17,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:18:17,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:18:17,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:18:17,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:18:17,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:18:17,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:18:17,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:18:17,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:18:17,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:18:17,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:18:17,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:18:17,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:18:17,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:18:17,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:18:17,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:18:17,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:18:17,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:18:17,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:18:17,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:18:17,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:18:17,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:18:17,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:18:17,994 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:18:18,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:18:18,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:18:18,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:18:18,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:18:18,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:18:18,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:18:18,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:18:18,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:18:18,059 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:18:18,059 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:18:18,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:18:18,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:18:18,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:18:18,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:18:18,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:18:18,062 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:18:18,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:18:18,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:18:18,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:18:18,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:18:18,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:18:18,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:18:18,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:18:18,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:18:18,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:18:18,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:18:18,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:18:18,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:18:18,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:18:18,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:18:18,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:18:18,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:18:18,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:18:18,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:18:18,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:18:18,069 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:18:18,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:18:18,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:18:18,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:18:18,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:18:18,070 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_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11d6d848444c2f9afc2eba3aace7d6b72c4d182e1953661ba8811794c092f478 [2021-11-19 14:18:18,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:18:18,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:18:18,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:18:18,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:18:18,365 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:18:18,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2021-11-19 14:18:18,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/data/4e798ffba/438cc67cea43475682cf0bf1ab29de5d/FLAGc89c3a357 [2021-11-19 14:18:18,938 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:18:18,938 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2021-11-19 14:18:18,944 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/data/4e798ffba/438cc67cea43475682cf0bf1ab29de5d/FLAGc89c3a357 [2021-11-19 14:18:19,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/data/4e798ffba/438cc67cea43475682cf0bf1ab29de5d [2021-11-19 14:18:19,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:18:19,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:18:19,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:18:19,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:18:19,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:18:19,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3a3033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19, skipping insertion in model container [2021-11-19 14:18:19,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:18:19,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:18:19,524 WARN L230 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_3a753c8f-8490-4fe6-8837-0cc349313b47/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c[327,340] [2021-11-19 14:18:19,556 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:18:19,563 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:18:19,574 WARN L230 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_3a753c8f-8490-4fe6-8837-0cc349313b47/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c[327,340] [2021-11-19 14:18:19,576 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:18:19,587 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:18:19,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19 WrapperNode [2021-11-19 14:18:19,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:18:19,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:18:19,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:18:19,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:18:19,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,626 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-11-19 14:18:19,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:18:19,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:18:19,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:18:19,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:18:19,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:18:19,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:18:19,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:18:19,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:18:19,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (1/1) ... [2021-11-19 14:18:19,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:18:19,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:19,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:18:19,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:18:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:18:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:18:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:18:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:18:19,804 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:18:19,806 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:18:19,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:18:19,919 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:18:19,919 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:18:19,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:19 BoogieIcfgContainer [2021-11-19 14:18:19,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:18:19,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:18:19,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:18:19,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:18:19,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:18:19" (1/3) ... [2021-11-19 14:18:19,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72880b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:18:19, skipping insertion in model container [2021-11-19 14:18:19,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:18:19" (2/3) ... [2021-11-19 14:18:19,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72880b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:18:19, skipping insertion in model container [2021-11-19 14:18:19,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:19" (3/3) ... [2021-11-19 14:18:19,931 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2021-11-19 14:18:19,937 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:18:19,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:18:19,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:18:19,995 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 [2021-11-19 14:18:19,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:18:20,009 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) [2021-11-19 14:18:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:18:20,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:20,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:18:20,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2021-11-19 14:18:20,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:20,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740097996] [2021-11-19 14:18:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:20,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:20,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:18:20,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740097996] [2021-11-19 14:18:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740097996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:20,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:20,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:18:20,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614644979] [2021-11-19 14:18:20,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:20,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:18:20,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:18:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:18:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:18:20,227 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) [2021-11-19 14:18:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:20,282 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-19 14:18:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:18:20,293 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 [2021-11-19 14:18:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:20,300 INFO L225 Difference]: With dead ends: 13 [2021-11-19 14:18:20,301 INFO L226 Difference]: Without dead ends: 6 [2021-11-19 14:18:20,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:18:20,308 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:20,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:18:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-19 14:18:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-19 14:18:20,338 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) [2021-11-19 14:18:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-19 14:18:20,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-19 14:18:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-19 14:18:20,340 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) [2021-11-19 14:18:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-19 14:18:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:18:20,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:20,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:18:20,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:18:20,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2021-11-19 14:18:20,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:20,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005657871] [2021-11-19 14:18:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:20,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:20,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:18:20,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005657871] [2021-11-19 14:18:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005657871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:18:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734415738] [2021-11-19 14:18:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:20,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:20,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:20,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:18:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:18:20,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:20,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734415738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:20,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626120145] [2021-11-19 14:18:20,792 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:18:20,793 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:18:20,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:18:20,820 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:18:20,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:18:20,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:18:20,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-19 14:18:20,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:20,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:18:21,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-11-19 14:18:21,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:21,222 INFO L180 QuantifierPusher]: treesize reduction 12, result has 70.7 percent of original size [2021-11-19 14:18:21,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-19 14:18:21,247 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:18:21,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:18:21,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:18:21,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2021-11-19 14:18:21,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324349353] [2021-11-19 14:18:21,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:18:21,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:18:21,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:18:21,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:18:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:18:21,433 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 14:18:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:21,581 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-19 14:18:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:18:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 [2021-11-19 14:18:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:21,583 INFO L225 Difference]: With dead ends: 14 [2021-11-19 14:18:21,583 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 14:18:21,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:18:21,586 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:21,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:18:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 14:18:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 14:18:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-19 14:18:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-19 14:18:21,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-19 14:18:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:21,591 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-19 14:18:21,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 14:18:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-19 14:18:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:18:21,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:21,592 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-19 14:18:21,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:21,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:21,807 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2021-11-19 14:18:21,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:21,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286736837] [2021-11-19 14:18:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:21,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:21,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:18:21,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286736837] [2021-11-19 14:18:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286736837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:18:21,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981304194] [2021-11-19 14:18:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:21,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:21,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:21,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:18:22,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:18:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:18:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:22,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981304194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:22,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245078636] [2021-11-19 14:18:22,319 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:18:22,319 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:18:22,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:18:22,320 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:18:22,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:18:22,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:18:22,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-19 14:18:22,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:18:22,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-19 14:18:22,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:18:22,472 INFO L180 QuantifierPusher]: treesize reduction 12, result has 70.7 percent of original size [2021-11-19 14:18:22,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-19 14:18:22,488 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:18:22,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:18:22,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:18:22,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-11-19 14:18:22,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051399847] [2021-11-19 14:18:22,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:18:22,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:18:22,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:18:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:18:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:18:22,649 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-19 14:18:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:25,376 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-19 14:18:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:18:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 8 [2021-11-19 14:18:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:25,377 INFO L225 Difference]: With dead ends: 25 [2021-11-19 14:18:25,377 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 14:18:25,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:18:25,379 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:18:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 14:18:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-19 14:18:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-19 14:18:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-19 14:18:25,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-19 14:18:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:25,391 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-19 14:18:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-19 14:18:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-19 14:18:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 14:18:25,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:25,392 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-11-19 14:18:25,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:25,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 14:18:25,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1684538919, now seen corresponding path program 3 times [2021-11-19 14:18:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:18:25,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151444974] [2021-11-19 14:18:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:25,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:18:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:18:25,626 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:18:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:18:25,675 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:18:25,675 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:18:25,676 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:18:25,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 14:18:25,682 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-19 14:18:25,685 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:18:25,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:18:25 BoogieIcfgContainer [2021-11-19 14:18:25,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:18:25,707 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:18:25,707 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:18:25,707 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:18:25,708 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:18:19" (3/4) ... [2021-11-19 14:18:25,709 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:18:25,744 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:18:25,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:18:25,745 INFO L158 Benchmark]: Toolchain (without parser) took 6401.49ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 56.6MB in the beginning and 45.5MB in the end (delta: 11.1MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,746 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 72.8MB in the beginning and 72.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:18:25,746 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.21ms. Allocated memory is still 96.5MB. Free memory was 56.4MB in the beginning and 73.7MB in the end (delta: -17.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,746 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.07ms. Allocated memory is still 96.5MB. Free memory was 73.7MB in the beginning and 72.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,747 INFO L158 Benchmark]: Boogie Preprocessor took 31.98ms. Allocated memory is still 96.5MB. Free memory was 72.4MB in the beginning and 71.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:18:25,747 INFO L158 Benchmark]: RCFGBuilder took 260.56ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 62.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,748 INFO L158 Benchmark]: TraceAbstraction took 5782.51ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.9MB in the beginning and 47.6MB in the end (delta: 14.3MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,748 INFO L158 Benchmark]: Witness Printer took 37.62ms. Allocated memory is still 117.4MB. Free memory was 47.6MB in the beginning and 45.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:18:25,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 72.8MB in the beginning and 72.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.21ms. Allocated memory is still 96.5MB. Free memory was 56.4MB in the beginning and 73.7MB in the end (delta: -17.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.07ms. Allocated memory is still 96.5MB. Free memory was 73.7MB in the beginning and 72.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.98ms. Allocated memory is still 96.5MB. Free memory was 72.4MB in the beginning and 71.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.56ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 62.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5782.51ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.9MB in the beginning and 47.6MB in the end (delta: 14.3MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * Witness Printer took 37.62ms. Allocated memory is still 117.4MB. Free memory was 47.6MB in the beginning and 45.5MB 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 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(y != 64) [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 115 IncrementalHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 7 mSDtfsCounter, 115 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 27, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 147 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 RESULT: Ultimate proved your program to be incorrect! [2021-11-19 14:18:25,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a753c8f-8490-4fe6-8837-0cc349313b47/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE