./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta --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 d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 --- 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-dbf71c6-m [2022-10-17 17:37:58,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:58,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:58,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:58,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:58,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:58,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:58,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:58,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:58,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:58,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:58,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:58,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:58,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:58,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:58,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:58,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:58,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:58,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:58,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:58,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:58,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:58,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:58,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:58,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:58,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:58,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:58,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:58,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:58,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:58,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:58,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:58,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:58,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:58,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:58,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:58,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:58,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:58,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:58,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:58,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:58,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:37:59,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:59,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:59,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:59,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:59,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:59,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:59,047 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:59,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:59,047 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:59,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:59,048 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:59,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:59,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:59,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:59,049 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:59,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:59,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:59,050 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:59,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:59,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:59,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:59,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:59,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:59,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:59,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:59,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:59,052 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:59,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:59,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:59,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:59,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:59,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:59,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:59,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:59,054 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:59,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:59,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:59,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:59,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:59,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:59,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:59,057 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_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2022-10-17 17:37:59,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:59,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:59,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:59,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:59,407 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:59,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/loops/vogal-2.i [2022-10-17 17:37:59,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/data/459382589/249f6a5b15254d24988a36f075a11f55/FLAG8f4ba0bcc [2022-10-17 17:37:59,938 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:59,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/sv-benchmarks/c/loops/vogal-2.i [2022-10-17 17:37:59,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/data/459382589/249f6a5b15254d24988a36f075a11f55/FLAG8f4ba0bcc [2022-10-17 17:38:00,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/data/459382589/249f6a5b15254d24988a36f075a11f55 [2022-10-17 17:38:00,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:00,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:00,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:00,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:00,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:00,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e29a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00, skipping insertion in model container [2022-10-17 17:38:00,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:00,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:00,531 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_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-10-17 17:38:00,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:00,577 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:00,588 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_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-10-17 17:38:00,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:00,615 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:00,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00 WrapperNode [2022-10-17 17:38:00,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:00,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:00,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:00,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:00,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,657 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-10-17 17:38:00,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:00,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:00,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:00,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:00,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:00,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:00,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:00,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:00,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (1/1) ... [2022-10-17 17:38:00,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:00,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:00,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:00,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:00,875 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:00,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:01,152 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:01,274 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:01,274 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 17:38:01,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:01 BoogieIcfgContainer [2022-10-17 17:38:01,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:01,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:01,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:01,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:01,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:00" (1/3) ... [2022-10-17 17:38:01,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f84d049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:01, skipping insertion in model container [2022-10-17 17:38:01,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:00" (2/3) ... [2022-10-17 17:38:01,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f84d049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:01, skipping insertion in model container [2022-10-17 17:38:01,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:01" (3/3) ... [2022-10-17 17:38:01,287 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-10-17 17:38:01,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:01,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:01,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:01,406 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;@38b851c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:01,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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) [2022-10-17 17:38:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:38:01,421 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:01,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:01,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 838005708, now seen corresponding path program 1 times [2022-10-17 17:38:01,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:01,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595066142] [2022-10-17 17:38:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:01,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:01,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595066142] [2022-10-17 17:38:01,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595066142] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:01,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:01,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085993247] [2022-10-17 17:38:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:01,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:38:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:01,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:38:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:01,732 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-10-17 17:38:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:01,780 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2022-10-17 17:38:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:38:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2022-10-17 17:38:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:01,792 INFO L225 Difference]: With dead ends: 28 [2022-10-17 17:38:01,792 INFO L226 Difference]: Without dead ends: 14 [2022-10-17 17:38:01,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:01,802 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:01,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-10-17 17:38:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-10-17 17:38:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2022-10-17 17:38:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-10-17 17:38:01,848 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2022-10-17 17:38:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:01,849 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-10-17 17:38:01,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-10-17 17:38:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-10-17 17:38:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:38:01,852 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:01,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:01,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:01,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash -867170668, now seen corresponding path program 1 times [2022-10-17 17:38:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:01,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659964624] [2022-10-17 17:38:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:02,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:02,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659964624] [2022-10-17 17:38:02,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659964624] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:02,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:02,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547424146] [2022-10-17 17:38:02,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:02,135 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:02,210 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-10-17 17:38:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:38:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:02,213 INFO L225 Difference]: With dead ends: 36 [2022-10-17 17:38:02,213 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:38:02,214 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:38:02,216 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:02,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:38:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-10-17 17:38:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-10-17 17:38:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-10-17 17:38:02,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 11 [2022-10-17 17:38:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:02,224 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-10-17 17:38:02,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-10-17 17:38:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:38:02,225 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:02,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:02,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:02,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1200428692, now seen corresponding path program 1 times [2022-10-17 17:38:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:02,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787799145] [2022-10-17 17:38:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:02,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:02,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787799145] [2022-10-17 17:38:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787799145] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621116099] [2022-10-17 17:38:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:02,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:02,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:38:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:38:02,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:02,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621116099] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:02,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:02,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-10-17 17:38:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081859471] [2022-10-17 17:38:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:38:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:38:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:02,703 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-10-17 17:38:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:02,812 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-10-17 17:38:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:38:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-10-17 17:38:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:02,814 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:38:02,815 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 17:38:02,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:02,820 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:02,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 17:38:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-10-17 17:38:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2022-10-17 17:38:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-10-17 17:38:02,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 12 [2022-10-17 17:38:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-10-17 17:38:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-10-17 17:38:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-10-17 17:38:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:38:02,838 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:02,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:02,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:03,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1040260253, now seen corresponding path program 1 times [2022-10-17 17:38:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177032273] [2022-10-17 17:38:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:03,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:03,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177032273] [2022-10-17 17:38:03,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177032273] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:03,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333189911] [2022-10-17 17:38:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:03,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:03,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:03,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:03,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:38:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:38:03,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:03,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:03,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333189911] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:03,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:03,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-10-17 17:38:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936851619] [2022-10-17 17:38:03,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:03,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:03,441 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-10-17 17:38:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:03,503 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-10-17 17:38:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-10-17 17:38:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:03,506 INFO L225 Difference]: With dead ends: 52 [2022-10-17 17:38:03,506 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:38:03,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:03,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:03,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:38:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2022-10-17 17:38:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 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) [2022-10-17 17:38:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-10-17 17:38:03,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 15 [2022-10-17 17:38:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-10-17 17:38:03,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-10-17 17:38:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-10-17 17:38:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:38:03,526 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:03,526 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:03,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:03,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:03,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1610622870, now seen corresponding path program 1 times [2022-10-17 17:38:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699218443] [2022-10-17 17:38:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:38:03,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699218443] [2022-10-17 17:38:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699218443] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55849686] [2022-10-17 17:38:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:03,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:03,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:03,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:38:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 17:38:03,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:04,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:38:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:38:04,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:04,284 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 17:38:04,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-10-17 17:38:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:04,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55849686] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:04,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:38:04,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2022-10-17 17:38:04,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906908093] [2022-10-17 17:38:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:04,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:38:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:38:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:38:04,307 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-10-17 17:38:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:04,519 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-10-17 17:38:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:38:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) Word has length 16 [2022-10-17 17:38:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:04,520 INFO L225 Difference]: With dead ends: 36 [2022-10-17 17:38:04,520 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 17:38:04,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:38:04,521 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:04,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 17:38:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-17 17:38:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2022-10-17 17:38:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-10-17 17:38:04,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2022-10-17 17:38:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:04,527 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-10-17 17:38:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2022-10-17 17:38:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-10-17 17:38:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:38:04,528 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:04,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:04,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:04,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:04,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash 385246536, now seen corresponding path program 1 times [2022-10-17 17:38:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:04,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393322774] [2022-10-17 17:38:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:04,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:38:04,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393322774] [2022-10-17 17:38:04,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393322774] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339844687] [2022-10-17 17:38:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:04,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:04,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:38:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 17:38:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:05,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-10-17 17:38:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:05,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:05,200 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-17 17:38:05,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-10-17 17:38:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:38:05,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339844687] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:05,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443107252] [2022-10-17 17:38:05,243 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:38:05,243 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:05,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:05,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:05,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,348 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:38:05,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-10-17 17:38:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,409 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:05,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-10-17 17:38:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:05,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:05,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:06,131 INFO L356 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-10-17 17:38:06,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-10-17 17:38:06,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:06,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:06,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:07,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '752#(and (= |ULTIMATE.start_main_~cont_aux~0#1| 0) (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:07,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:07,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:07,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 7] total 15 [2022-10-17 17:38:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201015792] [2022-10-17 17:38:07,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:07,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 17:38:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 17:38:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:38:07,286 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-10-17 17:38:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:07,572 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2022-10-17 17:38:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:38:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 17 [2022-10-17 17:38:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:07,575 INFO L225 Difference]: With dead ends: 89 [2022-10-17 17:38:07,575 INFO L226 Difference]: Without dead ends: 70 [2022-10-17 17:38:07,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-10-17 17:38:07,577 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 56 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-17 17:38:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 25. [2022-10-17 17:38:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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) [2022-10-17 17:38:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:38:07,586 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-10-17 17:38:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:07,587 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:38:07,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-10-17 17:38:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:38:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:38:07,588 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:07,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:07,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:07,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:38:07,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -483308211, now seen corresponding path program 1 times [2022-10-17 17:38:07,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665166194] [2022-10-17 17:38:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:38:07,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665166194] [2022-10-17 17:38:07,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665166194] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852427802] [2022-10-17 17:38:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:07,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:07,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:38:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:38:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:38:08,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:38:08,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852427802] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49751389] [2022-10-17 17:38:08,087 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:38:08,088 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:08,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:08,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:08,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:08,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,147 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:38:08,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-10-17 17:38:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,203 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:08,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-10-17 17:38:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:08,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:08,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:08,719 INFO L356 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-10-17 17:38:08,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-10-17 17:38:08,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:08,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:09,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:10,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~cont~0#1| 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.offset|) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:10,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:10,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:10,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-10-17 17:38:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692530922] [2022-10-17 17:38:10,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:38:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:38:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:38:10,416 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2022-10-17 17:38:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:10,970 INFO L93 Difference]: Finished difference Result 126 states and 183 transitions. [2022-10-17 17:38:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 17:38:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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 19 [2022-10-17 17:38:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:10,972 INFO L225 Difference]: With dead ends: 126 [2022-10-17 17:38:10,972 INFO L226 Difference]: Without dead ends: 105 [2022-10-17 17:38:10,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 17:38:10,974 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:10,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 61 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:38:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-10-17 17:38:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 29. [2022-10-17 17:38:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2022-10-17 17:38:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-10-17 17:38:10,986 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2022-10-17 17:38:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:10,986 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-10-17 17:38:10,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 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) [2022-10-17 17:38:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-10-17 17:38:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:38:10,987 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:10,987 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:11,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:11,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:11,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:11,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1479905905, now seen corresponding path program 1 times [2022-10-17 17:38:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:11,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706058754] [2022-10-17 17:38:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:38:11,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:11,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706058754] [2022-10-17 17:38:11,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706058754] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:11,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708991140] [2022-10-17 17:38:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:11,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:11,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:11,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:38:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 17:38:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:38:11,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 17:38:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708991140] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675253036] [2022-10-17 17:38:11,563 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:38:11,563 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:11,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:11,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:11,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,640 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:11,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-10-17 17:38:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2022-10-17 17:38:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:11,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:12,220 INFO L356 Elim1Store]: treesize reduction 1241, result has 7.7 percent of original size [2022-10-17 17:38:12,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 61 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 501 treesize of output 442 [2022-10-17 17:38:12,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:12,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:12,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:13,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1510#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~cont~0#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:13,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:13,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:13,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 12 [2022-10-17 17:38:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97062340] [2022-10-17 17:38:13,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:38:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:38:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:38:13,454 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-10-17 17:38:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:14,498 INFO L93 Difference]: Finished difference Result 138 states and 208 transitions. [2022-10-17 17:38:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-17 17:38:14,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 23 [2022-10-17 17:38:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:14,501 INFO L225 Difference]: With dead ends: 138 [2022-10-17 17:38:14,501 INFO L226 Difference]: Without dead ends: 114 [2022-10-17 17:38:14,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2022-10-17 17:38:14,503 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:14,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 105 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:38:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-17 17:38:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 42. [2022-10-17 17:38:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2022-10-17 17:38:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-10-17 17:38:14,522 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2022-10-17 17:38:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:14,522 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-10-17 17:38:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-10-17 17:38:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-10-17 17:38:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 17:38:14,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:14,523 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:14,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:14,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:14,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2102559866, now seen corresponding path program 2 times [2022-10-17 17:38:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:14,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553544522] [2022-10-17 17:38:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-10-17 17:38:14,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:14,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553544522] [2022-10-17 17:38:14,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553544522] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:14,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279564444] [2022-10-17 17:38:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:38:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:14,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:14,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:38:15,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:38:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:38:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-17 17:38:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:15,345 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:38:15,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-10-17 17:38:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:38:15,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:15,517 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-10-17 17:38:15,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-10-17 17:38:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-17 17:38:15,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279564444] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:15,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:38:15,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 18 [2022-10-17 17:38:15,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593449970] [2022-10-17 17:38:15,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:15,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:38:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:38:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:38:15,524 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-17 17:38:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:15,691 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-10-17 17:38:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:38:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 28 [2022-10-17 17:38:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:15,692 INFO L225 Difference]: With dead ends: 65 [2022-10-17 17:38:15,692 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 17:38:15,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:38:15,693 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:15,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 17:38:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-10-17 17:38:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 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) [2022-10-17 17:38:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-10-17 17:38:15,712 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2022-10-17 17:38:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:15,713 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-10-17 17:38:15,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-17 17:38:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-10-17 17:38:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 17:38:15,714 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:15,715 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:15,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:15,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1180888055, now seen corresponding path program 1 times [2022-10-17 17:38:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:15,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154303788] [2022-10-17 17:38:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:38:16,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:16,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154303788] [2022-10-17 17:38:16,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154303788] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:16,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118815814] [2022-10-17 17:38:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:16,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:16,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:16,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:38:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:38:16,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:38:16,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:38:16,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118815814] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730592440] [2022-10-17 17:38:16,464 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:38:16,464 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:16,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:16,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:16,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,523 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:38:16,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-10-17 17:38:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,582 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:16,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-10-17 17:38:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:16,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:17,034 INFO L356 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-10-17 17:38:17,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-10-17 17:38:17,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:17,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:17,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:18,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2460#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:18,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:18,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-10-17 17:38:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600696862] [2022-10-17 17:38:18,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:38:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:38:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:38:18,446 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 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) [2022-10-17 17:38:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:19,207 INFO L93 Difference]: Finished difference Result 269 states and 317 transitions. [2022-10-17 17:38:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:38:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 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 32 [2022-10-17 17:38:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:19,210 INFO L225 Difference]: With dead ends: 269 [2022-10-17 17:38:19,210 INFO L226 Difference]: Without dead ends: 232 [2022-10-17 17:38:19,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-10-17 17:38:19,212 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 284 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:19,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 157 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:38:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-10-17 17:38:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 49. [2022-10-17 17:38:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-10-17 17:38:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-10-17 17:38:19,246 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 32 [2022-10-17 17:38:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:19,246 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-10-17 17:38:19,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 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) [2022-10-17 17:38:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-10-17 17:38:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 17:38:19,254 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:19,254 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:19,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:19,469 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:19,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1303700233, now seen corresponding path program 2 times [2022-10-17 17:38:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:19,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881279924] [2022-10-17 17:38:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-10-17 17:38:19,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881279924] [2022-10-17 17:38:19,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881279924] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628951638] [2022-10-17 17:38:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:38:19,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:19,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:19,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 17:38:20,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 17:38:20,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:38:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:38:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-10-17 17:38:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-10-17 17:38:20,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628951638] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30413337] [2022-10-17 17:38:20,143 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:38:20,143 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:20,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:20,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:20,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,199 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:38:20,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-10-17 17:38:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,248 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:20,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-10-17 17:38:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:20,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:20,690 INFO L356 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-10-17 17:38:20,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-10-17 17:38:20,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:20,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:21,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:21,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3270#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:21,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:21,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:21,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-17 17:38:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082706743] [2022-10-17 17:38:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:21,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:38:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:38:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:38:21,916 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2022-10-17 17:38:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:22,144 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-10-17 17:38:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:38:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 38 [2022-10-17 17:38:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:22,146 INFO L225 Difference]: With dead ends: 81 [2022-10-17 17:38:22,146 INFO L226 Difference]: Without dead ends: 59 [2022-10-17 17:38:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-10-17 17:38:22,148 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-17 17:38:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-10-17 17:38:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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) [2022-10-17 17:38:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-10-17 17:38:22,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 38 [2022-10-17 17:38:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:22,193 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-10-17 17:38:22,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2022-10-17 17:38:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-10-17 17:38:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:38:22,195 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:22,195 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:22,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:22,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:22,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1305078729, now seen corresponding path program 3 times [2022-10-17 17:38:22,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:22,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857471784] [2022-10-17 17:38:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:22,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-10-17 17:38:22,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857471784] [2022-10-17 17:38:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857471784] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386886234] [2022-10-17 17:38:22,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:38:22,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:22,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:22,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:22,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 17:38:23,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:38:23,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:38:23,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 17:38:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-10-17 17:38:23,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-10-17 17:38:23,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386886234] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:23,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524685947] [2022-10-17 17:38:23,689 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:38:23,690 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:23,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:23,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:23,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:23,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,759 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-10-17 17:38:23,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-10-17 17:38:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-10-17 17:38:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2022-10-17 17:38:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:23,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:38:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:24,251 INFO L356 Elim1Store]: treesize reduction 1241, result has 7.7 percent of original size [2022-10-17 17:38:24,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 62 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 501 treesize of output 442 [2022-10-17 17:38:24,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:38:24,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:24,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:25,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3814#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:25,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:25,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:25,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-10-17 17:38:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126133361] [2022-10-17 17:38:25,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 17:38:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 17:38:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-10-17 17:38:25,763 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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) [2022-10-17 17:38:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:25,948 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-10-17 17:38:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:38:25,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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 44 [2022-10-17 17:38:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:25,949 INFO L225 Difference]: With dead ends: 90 [2022-10-17 17:38:25,949 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 17:38:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-10-17 17:38:25,950 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:25,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:38:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 17:38:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-17 17:38:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 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) [2022-10-17 17:38:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-10-17 17:38:25,974 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2022-10-17 17:38:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:25,975 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-10-17 17:38:25,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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) [2022-10-17 17:38:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-10-17 17:38:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:38:25,979 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:25,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:26,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 17:38:26,198 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash -81402423, now seen corresponding path program 4 times [2022-10-17 17:38:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:26,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338603122] [2022-10-17 17:38:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:38:27,189 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:38:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:38:27,780 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:38:27,780 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:38:27,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:38:27,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 17:38:27,789 INFO L444 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:27,794 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:38:27,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:38:27 BoogieIcfgContainer [2022-10-17 17:38:27,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:38:27,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:38:27,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:38:27,922 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:38:27,923 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:01" (3/4) ... [2022-10-17 17:38:27,925 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 17:38:28,024 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6f054e-a11f-4a9e-aea5-c1aa7ce0fe15/bin/utaipan-G1rejxKTta/witness.graphml [2022-10-17 17:38:28,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:38:28,025 INFO L158 Benchmark]: Toolchain (without parser) took 27728.06ms. Allocated memory was 90.2MB in the beginning and 268.4MB in the end (delta: 178.3MB). Free memory was 64.5MB in the beginning and 152.7MB in the end (delta: -88.3MB). Peak memory consumption was 88.7MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,025 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:38:28,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.96ms. Allocated memory is still 90.2MB. Free memory was 64.2MB in the beginning and 63.4MB in the end (delta: 795.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.71ms. Allocated memory is still 90.2MB. Free memory was 63.2MB in the beginning and 61.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,027 INFO L158 Benchmark]: Boogie Preprocessor took 48.13ms. Allocated memory is still 90.2MB. Free memory was 61.3MB in the beginning and 60.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,027 INFO L158 Benchmark]: RCFGBuilder took 568.85ms. Allocated memory is still 90.2MB. Free memory was 59.8MB in the beginning and 43.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,028 INFO L158 Benchmark]: TraceAbstraction took 26641.57ms. Allocated memory was 90.2MB in the beginning and 268.4MB in the end (delta: 178.3MB). Free memory was 42.2MB in the beginning and 156.9MB in the end (delta: -114.7MB). Peak memory consumption was 138.9MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,028 INFO L158 Benchmark]: Witness Printer took 102.18ms. Allocated memory is still 268.4MB. Free memory was 156.9MB in the beginning and 152.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-10-17 17:38:28,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.96ms. Allocated memory is still 90.2MB. Free memory was 64.2MB in the beginning and 63.4MB in the end (delta: 795.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.71ms. Allocated memory is still 90.2MB. Free memory was 63.2MB in the beginning and 61.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.13ms. Allocated memory is still 90.2MB. Free memory was 61.3MB in the beginning and 60.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 568.85ms. Allocated memory is still 90.2MB. Free memory was 59.8MB in the beginning and 43.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 26641.57ms. Allocated memory was 90.2MB in the beginning and 268.4MB in the end (delta: 178.3MB). Free memory was 42.2MB in the beginning and 156.9MB in the end (delta: -114.7MB). Peak memory consumption was 138.9MB. Max. memory is 16.1GB. * Witness Printer took 102.18ms. Allocated memory is still 268.4MB. Free memory was 156.9MB in the beginning and 152.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] char string_entrada[10], vetor_vogais[]={'a','A','e','E','i','I','o','O','u','U','\0'}; [L27] unsigned int i,j,cont, tam_string, n_caracter; [L29] i=0 VAL [i=0, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=1, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=2, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=3, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=4, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=5, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=6, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=7, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=8, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=9, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=10, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND FALSE !(i<10) [L32] string_entrada[10 -1]='\0' [L34] n_caracter = 0 VAL [i=10, n_caracter=0, string_entrada={12:0}, vetor_vogais={13:0}] [L35] EXPR string_entrada[n_caracter] VAL [i=10, n_caracter=0, string_entrada={12:0}, string_entrada[n_caracter]=117, vetor_vogais={13:0}] [L35] COND TRUE string_entrada[n_caracter]!='\0' [L36] n_caracter++ VAL [i=10, n_caracter=1, string_entrada={12:0}, vetor_vogais={13:0}] [L35] EXPR string_entrada[n_caracter] VAL [i=10, n_caracter=1, string_entrada={12:0}, string_entrada[n_caracter]=0, vetor_vogais={13:0}] [L35] COND FALSE !(string_entrada[n_caracter]!='\0') [L38] cont = 0 [L39] i=0 VAL [cont=0, i=0, n_caracter=1, string_entrada={12:0}, vetor_vogais={13:0}] [L39] COND TRUE i