./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur --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-38b53e6 [2022-11-26 01:04:50,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:04:50,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:04:50,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:04:50,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:04:50,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:04:50,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:04:50,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:04:50,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:04:50,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:04:50,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:04:50,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:04:50,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:04:50,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:04:50,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:04:50,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:04:50,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:04:50,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:04:50,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:04:50,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:04:51,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:04:51,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:04:51,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:04:51,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:04:51,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:04:51,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:04:51,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:04:51,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:04:51,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:04:51,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:04:51,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:04:51,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:04:51,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:04:51,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:04:51,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:04:51,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:04:51,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:04:51,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:04:51,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:04:51,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:04:51,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:04:51,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:04:51,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:04:51,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:04:51,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:04:51,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:04:51,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:04:51,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:04:51,073 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:04:51,073 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:04:51,073 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:04:51,073 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:04:51,073 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:04:51,074 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:04:51,074 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:04:51,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:04:51,074 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:04:51,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:04:51,076 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:04:51,076 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:04:51,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:04:51,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:04:51,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:04:51,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:04:51,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:04:51,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:04:51,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:04:51,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:04:51,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:04:51,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:04:51,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:04:51,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:04:51,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:04:51,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:04:51,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:51,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:04:51,082 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:04:51,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:04:51,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:04:51,084 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:04:51,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:04:51,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:04:51,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:04:51,084 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_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2022-11-26 01:04:51,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:04:51,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:04:51,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:04:51,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:04:51,406 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:04:51,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loops/vogal-2.i [2022-11-26 01:04:54,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:04:54,630 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:04:54,631 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/sv-benchmarks/c/loops/vogal-2.i [2022-11-26 01:04:54,637 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/data/bdb658f18/ebb24b7c28c1488fb0d8ff5bc625b258/FLAGd00c42458 [2022-11-26 01:04:54,652 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/data/bdb658f18/ebb24b7c28c1488fb0d8ff5bc625b258 [2022-11-26 01:04:54,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:04:54,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:04:54,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:54,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:04:54,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:04:54,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:54,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5b0fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54, skipping insertion in model container [2022-11-26 01:04:54,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:54,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:04:54,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:04:54,898 WARN L237 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_39072dfd-f9f1-45d6-8cb5-880b55640af7/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-11-26 01:04:54,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:54,928 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:04:54,938 WARN L237 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_39072dfd-f9f1-45d6-8cb5-880b55640af7/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-11-26 01:04:54,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:04:54,966 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:04:54,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54 WrapperNode [2022-11-26 01:04:54,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:04:54,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:54,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:04:54,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:04:54,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:54,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,006 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-11-26 01:04:55,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:04:55,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:04:55,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:04:55,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:04:55,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:04:55,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:04:55,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:04:55,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:04:55,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (1/1) ... [2022-11-26 01:04:55,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:04:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:55,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:04:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:04:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:04:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:04:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:04:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:04:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:04:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:04:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:04:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:04:55,236 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:04:55,237 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:04:55,436 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:04:55,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:04:55,535 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 01:04:55,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:55 BoogieIcfgContainer [2022-11-26 01:04:55,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:04:55,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:04:55,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:04:55,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:04:55,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:04:54" (1/3) ... [2022-11-26 01:04:55,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6ff003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:55, skipping insertion in model container [2022-11-26 01:04:55,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:04:54" (2/3) ... [2022-11-26 01:04:55,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6ff003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:04:55, skipping insertion in model container [2022-11-26 01:04:55,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:55" (3/3) ... [2022-11-26 01:04:55,548 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-11-26 01:04:55,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:04:55,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:04:55,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:04:55,669 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;@6e5c898a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:04:55,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:04:55,674 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) [2022-11-26 01:04:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:04:55,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:55,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:55,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 838005708, now seen corresponding path program 1 times [2022-11-26 01:04:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628939129] [2022-11-26 01:04:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:55,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:55,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628939129] [2022-11-26 01:04:55,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628939129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:55,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:55,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:04:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193310108] [2022-11-26 01:04:55,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:04:55,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:04:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:04:56,040 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) [2022-11-26 01:04:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:56,125 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2022-11-26 01:04:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:04:56,129 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 [2022-11-26 01:04:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:56,137 INFO L225 Difference]: With dead ends: 28 [2022-11-26 01:04:56,137 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 01:04:56,141 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 [2022-11-26 01:04:56,145 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:56,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 01:04:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 01:04:56,176 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) [2022-11-26 01:04:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-11-26 01:04:56,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2022-11-26 01:04:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:56,180 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-11-26 01:04:56,181 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) [2022-11-26 01:04:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-11-26 01:04:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:04:56,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:56,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:04:56,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -867170668, now seen corresponding path program 1 times [2022-11-26 01:04:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723454728] [2022-11-26 01:04:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:56,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723454728] [2022-11-26 01:04:56,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723454728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:56,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:56,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:04:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073037356] [2022-11-26 01:04:56,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:56,397 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) [2022-11-26 01:04:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:56,445 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-11-26 01:04:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:56,446 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 [2022-11-26 01:04:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:56,447 INFO L225 Difference]: With dead ends: 36 [2022-11-26 01:04:56,447 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 01:04:56,448 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 [2022-11-26 01:04:56,449 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:56,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 01:04:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-11-26 01:04:56,455 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) [2022-11-26 01:04:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-26 01:04:56,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 11 [2022-11-26 01:04:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:56,457 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-26 01:04:56,457 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) [2022-11-26 01:04:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-26 01:04:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:04:56,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:56,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:04:56,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1200428692, now seen corresponding path program 1 times [2022-11-26 01:04:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277431527] [2022-11-26 01:04:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:04:56,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:56,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277431527] [2022-11-26 01:04:56,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277431527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:56,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317706480] [2022-11-26 01:04:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:56,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:56,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:56,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:56,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:04:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:56,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:04:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:04:57,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:57,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317706480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:57,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:57,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-11-26 01:04:57,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990960750] [2022-11-26 01:04:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:57,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:04:57,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:57,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:04:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:57,018 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) [2022-11-26 01:04:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:57,151 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-11-26 01:04:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:04:57,151 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 [2022-11-26 01:04:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:57,153 INFO L225 Difference]: With dead ends: 31 [2022-11-26 01:04:57,153 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 01:04:57,153 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 [2022-11-26 01:04:57,157 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:57,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 01:04:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-11-26 01:04:57,168 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) [2022-11-26 01:04:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-11-26 01:04:57,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 12 [2022-11-26 01:04:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:57,170 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-11-26 01:04:57,170 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) [2022-11-26 01:04:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-11-26 01:04:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:04:57,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:57,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:57,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:57,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:57,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1040260253, now seen corresponding path program 1 times [2022-11-26 01:04:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:57,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264854583] [2022-11-26 01:04:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:57,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:57,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264854583] [2022-11-26 01:04:57,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264854583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21503812] [2022-11-26 01:04:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:57,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:57,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:57,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:57,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:04:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:04:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:57,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:57,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21503812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:57,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:57,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-26 01:04:57,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031373279] [2022-11-26 01:04:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:04:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:04:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:04:57,698 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) [2022-11-26 01:04:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:57,740 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-26 01:04:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:04:57,741 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 [2022-11-26 01:04:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:57,741 INFO L225 Difference]: With dead ends: 52 [2022-11-26 01:04:57,742 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 01:04:57,742 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 [2022-11-26 01:04:57,745 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:57,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:04:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 01:04:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2022-11-26 01:04:57,754 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) [2022-11-26 01:04:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-26 01:04:57,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 15 [2022-11-26 01:04:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:57,758 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-26 01:04:57,758 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) [2022-11-26 01:04:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-26 01:04:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 01:04:57,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:57,760 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:57,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:57,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1610622870, now seen corresponding path program 1 times [2022-11-26 01:04:57,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:57,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814033251] [2022-11-26 01:04:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:04:58,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814033251] [2022-11-26 01:04:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814033251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358981403] [2022-11-26 01:04:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:58,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:04:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:04:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:58,350 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:04:58,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:58,535 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 01:04:58,536 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:58,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358981403] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:58,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:04:58,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2022-11-26 01:04:58,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250536289] [2022-11-26 01:04:58,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:58,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:04:58,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:58,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:04:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:04:58,559 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) [2022-11-26 01:04:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:58,739 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-26 01:04:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:04:58,741 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 [2022-11-26 01:04:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:58,742 INFO L225 Difference]: With dead ends: 36 [2022-11-26 01:04:58,742 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 01:04:58,743 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 [2022-11-26 01:04:58,743 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:58,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:04:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 01:04:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-26 01:04:58,748 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) [2022-11-26 01:04:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-26 01:04:58,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2022-11-26 01:04:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:58,749 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-26 01:04:58,749 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) [2022-11-26 01:04:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-26 01:04:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 01:04:58,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:58,750 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:58,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:58,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash 385246536, now seen corresponding path program 1 times [2022-11-26 01:04:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410596549] [2022-11-26 01:04:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:04:59,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410596549] [2022-11-26 01:04:59,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410596549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458700963] [2022-11-26 01:04:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:59,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:59,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:59,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:59,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:04:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:04:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:59,296 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:04:59,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:59,422 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 01:04:59,422 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:04:59,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458700963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:59,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557609522] [2022-11-26 01:04:59,463 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 01:04:59,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:59,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:59,472 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:59,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,569 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:04:59,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,637 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:04:59,638 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,719 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:04:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:59,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:59,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:00,249 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-11-26 01:05:00,250 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:00,490 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:00,506 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:00,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:01,527 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 [2022-11-26 01:05:01,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:01,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:01,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 7] total 15 [2022-11-26 01:05:01,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048029786] [2022-11-26 01:05:01,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:01,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 01:05:01,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 01:05:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:05:01,529 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) [2022-11-26 01:05:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:01,856 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2022-11-26 01:05:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:05:01,858 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 [2022-11-26 01:05:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:01,861 INFO L225 Difference]: With dead ends: 89 [2022-11-26 01:05:01,861 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 01:05:01,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:05:01,863 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:01,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 56 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:05:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 01:05:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 25. [2022-11-26 01:05:01,875 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) [2022-11-26 01:05:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-26 01:05:01,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-11-26 01:05:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:01,875 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-26 01:05:01,876 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) [2022-11-26 01:05:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-26 01:05:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 01:05:01,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:01,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:01,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:02,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -483308211, now seen corresponding path program 1 times [2022-11-26 01:05:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924257004] [2022-11-26 01:05:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:05:02,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:02,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924257004] [2022-11-26 01:05:02,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924257004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:02,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612036443] [2022-11-26 01:05:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:02,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:02,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:05:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:05:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:05:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:05:02,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612036443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:02,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714096995] [2022-11-26 01:05:02,382 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 01:05:02,382 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:02,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:02,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:02,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,459 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:05:02,460 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,533 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:02,533 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,623 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:02,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:03,068 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-11-26 01:05:03,069 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:03,265 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:03,279 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:03,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:04,814 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 [2022-11-26 01:05:04,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:04,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:04,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-11-26 01:05:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119575418] [2022-11-26 01:05:04,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:04,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:05:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:05:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:05:04,816 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) [2022-11-26 01:05:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:05,429 INFO L93 Difference]: Finished difference Result 126 states and 183 transitions. [2022-11-26 01:05:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:05:05,430 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 [2022-11-26 01:05:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:05,431 INFO L225 Difference]: With dead ends: 126 [2022-11-26 01:05:05,431 INFO L226 Difference]: Without dead ends: 105 [2022-11-26 01:05:05,431 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 [2022-11-26 01:05:05,432 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:05,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 61 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-26 01:05:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 29. [2022-11-26 01:05:05,471 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) [2022-11-26 01:05:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-26 01:05:05,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2022-11-26 01:05:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:05,474 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-26 01:05:05,474 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) [2022-11-26 01:05:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-26 01:05:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:05:05,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:05,475 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:05,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:05,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:05:05,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1479905905, now seen corresponding path program 1 times [2022-11-26 01:05:05,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:05,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090662044] [2022-11-26 01:05:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:05,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:05:05,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090662044] [2022-11-26 01:05:05,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090662044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493368073] [2022-11-26 01:05:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:05,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:05,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:05,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:05:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:05:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:05:06,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:05:06,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493368073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646098391] [2022-11-26 01:05:06,053 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 01:05:06,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:06,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:06,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:06,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:06,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,126 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:06,126 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,148 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,206 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:06,647 INFO L321 Elim1Store]: treesize reduction 1241, result has 7.7 percent of original size [2022-11-26 01:05:06,648 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:06,740 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:06,751 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:07,296 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:08,042 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 [2022-11-26 01:05:08,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:08,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:08,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 12 [2022-11-26 01:05:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211365746] [2022-11-26 01:05:08,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:08,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:05:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:05:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:05:08,045 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) [2022-11-26 01:05:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:09,087 INFO L93 Difference]: Finished difference Result 138 states and 208 transitions. [2022-11-26 01:05:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 01:05:09,088 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 [2022-11-26 01:05:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:09,090 INFO L225 Difference]: With dead ends: 138 [2022-11-26 01:05:09,090 INFO L226 Difference]: Without dead ends: 114 [2022-11-26 01:05:09,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 01:05:09,104 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:09,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 105 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:05:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-26 01:05:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 42. [2022-11-26 01:05:09,119 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) [2022-11-26 01:05:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-26 01:05:09,120 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2022-11-26 01:05:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:09,120 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-26 01:05:09,121 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) [2022-11-26 01:05:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-26 01:05:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 01:05:09,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:09,122 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:09,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 01:05:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:09,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2102559866, now seen corresponding path program 2 times [2022-11-26 01:05:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866550648] [2022-11-26 01:05:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 01:05:09,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866550648] [2022-11-26 01:05:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866550648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834475327] [2022-11-26 01:05:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:05:09,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:09,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:09,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:05:09,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:05:09,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 01:05:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:09,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:10,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:10,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:05:10,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2022-11-26 01:05:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:05:10,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 01:05:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834475327] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:10,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:05:10,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 9] total 19 [2022-11-26 01:05:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921511040] [2022-11-26 01:05:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:10,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:05:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:05:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:05:10,199 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) [2022-11-26 01:05:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:10,339 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-26 01:05:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:05:10,340 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 [2022-11-26 01:05:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:10,340 INFO L225 Difference]: With dead ends: 65 [2022-11-26 01:05:10,340 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 01:05:10,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:05:10,343 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:10,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 01:05:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-11-26 01:05:10,364 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) [2022-11-26 01:05:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-26 01:05:10,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2022-11-26 01:05:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:10,365 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-26 01:05:10,365 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) [2022-11-26 01:05:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-26 01:05:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 01:05:10,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:10,366 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:10,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:10,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:10,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1180888055, now seen corresponding path program 1 times [2022-11-26 01:05:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478391595] [2022-11-26 01:05:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:05:10,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478391595] [2022-11-26 01:05:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478391595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147127969] [2022-11-26 01:05:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:10,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:10,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:10,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:05:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:05:10,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:05:10,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:05:11,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147127969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:11,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740107035] [2022-11-26 01:05:11,147 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 01:05:11,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:11,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:11,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:11,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,203 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:05:11,204 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,261 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:11,261 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,308 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:11,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:11,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:11,646 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-11-26 01:05:11,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 58 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 [2022-11-26 01:05:11,811 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:11,823 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:12,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:13,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2466#(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 [2022-11-26 01:05:13,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:13,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:13,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 17 [2022-11-26 01:05:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803860216] [2022-11-26 01:05:13,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:13,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 01:05:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 01:05:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-26 01:05:13,290 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2022-11-26 01:05:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:14,623 INFO L93 Difference]: Finished difference Result 269 states and 317 transitions. [2022-11-26 01:05:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:05:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) Word has length 32 [2022-11-26 01:05:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:14,625 INFO L225 Difference]: With dead ends: 269 [2022-11-26 01:05:14,625 INFO L226 Difference]: Without dead ends: 232 [2022-11-26 01:05:14,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:05:14,627 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 272 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:14,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 241 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:05:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-26 01:05:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 49. [2022-11-26 01:05:14,650 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) [2022-11-26 01:05:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-26 01:05:14,651 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 32 [2022-11-26 01:05:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:14,651 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-26 01:05:14,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2022-11-26 01:05:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-26 01:05:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 01:05:14,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:14,652 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:14,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:05:14,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1303700233, now seen corresponding path program 2 times [2022-11-26 01:05:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:14,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366043743] [2022-11-26 01:05:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 01:05:15,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366043743] [2022-11-26 01:05:15,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366043743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8195337] [2022-11-26 01:05:15,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:05:15,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:15,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:15,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:05:15,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 01:05:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:05:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 01:05:15,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 01:05:15,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8195337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870049065] [2022-11-26 01:05:15,505 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 01:05:15,505 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:15,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:15,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:15,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,559 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:05:15,560 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,615 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:15,615 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,662 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:15,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:15,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:16,003 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-11-26 01:05:16,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 58 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 [2022-11-26 01:05:16,160 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:16,170 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:16,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:17,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3294#(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 [2022-11-26 01:05:17,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:17,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:17,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-26 01:05:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461975908] [2022-11-26 01:05:17,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:17,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:05:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:05:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:05:17,363 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) [2022-11-26 01:05:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:17,593 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-11-26 01:05:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:05:17,594 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 [2022-11-26 01:05:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:17,595 INFO L225 Difference]: With dead ends: 81 [2022-11-26 01:05:17,595 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 01:05:17,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:05:17,596 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:17,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:05:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 01:05:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-26 01:05:17,626 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) [2022-11-26 01:05:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-26 01:05:17,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 38 [2022-11-26 01:05:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:17,627 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-26 01:05:17,627 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) [2022-11-26 01:05:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-26 01:05:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 01:05:17,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:17,629 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:17,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:17,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:05:17,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1305078729, now seen corresponding path program 3 times [2022-11-26 01:05:17,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:17,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209156993] [2022-11-26 01:05:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:17,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-26 01:05:18,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:18,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209156993] [2022-11-26 01:05:18,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209156993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546252284] [2022-11-26 01:05:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:05:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:18,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:18,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:18,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:05:18,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:05:18,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 01:05:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 01:05:18,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-26 01:05:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546252284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422921384] [2022-11-26 01:05:19,069 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 01:05:19,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:19,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:19,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:19,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,133 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:19,134 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,151 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,196 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:19,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:19,554 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-11-26 01:05:19,555 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:19,701 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:19,714 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 01:05:20,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:21,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3847#(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 [2022-11-26 01:05:21,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:21,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:21,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 11] total 30 [2022-11-26 01:05:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716835865] [2022-11-26 01:05:21,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 01:05:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 01:05:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 01:05:21,482 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-11-26 01:05:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:26,373 INFO L93 Difference]: Finished difference Result 326 states and 383 transitions. [2022-11-26 01:05:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-26 01:05:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) Word has length 44 [2022-11-26 01:05:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:26,375 INFO L225 Difference]: With dead ends: 326 [2022-11-26 01:05:26,375 INFO L226 Difference]: Without dead ends: 297 [2022-11-26 01:05:26,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4954 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1173, Invalid=15597, Unknown=0, NotChecked=0, Total=16770 [2022-11-26 01:05:26,382 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 270 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:26,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 724 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 01:05:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-26 01:05:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 61. [2022-11-26 01:05:26,420 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) [2022-11-26 01:05:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-26 01:05:26,422 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2022-11-26 01:05:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:26,422 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-26 01:05:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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) [2022-11-26 01:05:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-26 01:05:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 01:05:26,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:26,427 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:26,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:05:26,633 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash -81402423, now seen corresponding path program 4 times [2022-11-26 01:05:26,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:26,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120616326] [2022-11-26 01:05:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:26,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:05:27,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 01:05:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:05:27,978 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 01:05:27,978 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 01:05:27,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 01:05:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 01:05:27,986 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:27,991 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:05:28,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:05:28 BoogieIcfgContainer [2022-11-26 01:05:28,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:05:28,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:05:28,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:05:28,096 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:05:28,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:04:55" (3/4) ... [2022-11-26 01:05:28,099 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 01:05:28,203 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39072dfd-f9f1-45d6-8cb5-880b55640af7/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:05:28,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:05:28,204 INFO L158 Benchmark]: Toolchain (without parser) took 33548.03ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 127.3MB in the beginning and 200.9MB in the end (delta: -73.6MB). Peak memory consumption was 106.6MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,205 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:05:28,206 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.05ms. Allocated memory is still 163.6MB. Free memory was 127.2MB in the beginning and 126.4MB in the end (delta: 737.5kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,207 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.51ms. Allocated memory is still 163.6MB. Free memory was 126.4MB in the beginning and 124.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:05:28,207 INFO L158 Benchmark]: Boogie Preprocessor took 29.44ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 123.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,208 INFO L158 Benchmark]: RCFGBuilder took 499.90ms. Allocated memory is still 163.6MB. Free memory was 123.3MB in the beginning and 105.4MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,208 INFO L158 Benchmark]: TraceAbstraction took 32554.70ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 104.5MB in the beginning and 206.2MB in the end (delta: -101.7MB). Peak memory consumption was 81.1MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,208 INFO L158 Benchmark]: Witness Printer took 108.09ms. Allocated memory is still 343.9MB. Free memory was 205.1MB in the beginning and 200.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:05:28,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.05ms. Allocated memory is still 163.6MB. Free memory was 127.2MB in the beginning and 126.4MB in the end (delta: 737.5kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.51ms. Allocated memory is still 163.6MB. Free memory was 126.4MB in the beginning and 124.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.44ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 123.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 499.90ms. Allocated memory is still 163.6MB. Free memory was 123.3MB in the beginning and 105.4MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 32554.70ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 104.5MB in the beginning and 206.2MB in the end (delta: -101.7MB). Peak memory consumption was 81.1MB. Max. memory is 16.1GB. * Witness Printer took 108.09ms. Allocated memory is still 343.9MB. Free memory was 205.1MB in the beginning and 200.9MB 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