./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl --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 d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:12:00,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:12:00,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:12:00,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:12:00,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:12:00,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:12:00,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:12:00,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:12:00,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:12:00,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:12:00,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:12:00,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:12:00,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:12:00,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:12:00,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:12:00,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:12:00,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:12:01,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:12:01,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:12:01,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:12:01,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:12:01,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:12:01,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:12:01,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:12:01,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:12:01,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:12:01,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:12:01,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:12:01,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:12:01,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:12:01,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:12:01,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:12:01,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:12:01,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:12:01,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:12:01,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:12:01,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:12:01,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:12:01,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:12:01,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:12:01,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:12:01,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:12:01,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:12:01,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:12:01,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:12:01,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:12:01,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:12:01,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:12:01,062 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:12:01,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:12:01,063 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:12:01,063 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:12:01,063 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:12:01,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:12:01,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:12:01,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:12:01,064 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:12:01,065 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:12:01,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:12:01,065 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:12:01,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:12:01,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:12:01,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:12:01,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:12:01,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:12:01,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:12:01,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:12:01,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:12:01,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:12:01,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:12:01,068 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:12:01,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:12:01,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:12:01,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:12:01,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:12:01,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:12:01,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:12:01,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:12:01,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:12:01,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:12:01,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:12:01,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:12:01,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:12:01,071 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f [2021-11-23 17:12:01,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:12:01,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:12:01,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:12:01,369 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:12:01,370 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:12:01,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-11-23 17:12:01,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/6f440f32e/e2d426770c16446290aa91d7e94f1dba/FLAG59274c594 [2021-11-23 17:12:02,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:12:02,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c [2021-11-23 17:12:02,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/6f440f32e/e2d426770c16446290aa91d7e94f1dba/FLAG59274c594 [2021-11-23 17:12:02,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/6f440f32e/e2d426770c16446290aa91d7e94f1dba [2021-11-23 17:12:02,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:12:02,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:12:02,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:12:02,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:12:02,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:12:02,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3465841f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02, skipping insertion in model container [2021-11-23 17:12:02,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:12:02,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:12:02,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-23 17:12:02,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:12:02,616 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:12:02,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-23 17:12:02,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:12:02,644 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:12:02,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02 WrapperNode [2021-11-23 17:12:02,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:12:02,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:12:02,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:12:02,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:12:02,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,690 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-23 17:12:02,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:12:02,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:12:02,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:12:02,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:12:02,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:12:02,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:12:02,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:12:02,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:12:02,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:02" (1/1) ... [2021-11-23 17:12:02,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:12:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:02,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:12:02,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:12:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:12:02,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:12:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:12:02,873 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:12:02,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:12:02,974 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:12:02,989 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:12:02,994 INFO L158 Benchmark]: Toolchain (without parser) took 615.08ms. Allocated memory was 94.4MB in the beginning and 146.8MB in the end (delta: 52.4MB). Free memory was 58.5MB in the beginning and 109.6MB in the end (delta: -51.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:12:02,995 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 65.6MB in the beginning and 65.6MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:12:02,997 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.97ms. Allocated memory was 94.4MB in the beginning and 146.8MB in the end (delta: 52.4MB). Free memory was 58.5MB in the beginning and 121.3MB in the end (delta: -62.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:12:02,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.41ms. Allocated memory is still 146.8MB. Free memory was 121.3MB in the beginning and 120.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:12:02,999 INFO L158 Benchmark]: Boogie Preprocessor took 32.51ms. Allocated memory is still 146.8MB. Free memory was 120.0MB in the beginning and 119.2MB in the end (delta: 853.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:12:03,000 INFO L158 Benchmark]: RCFGBuilder took 265.41ms. Allocated memory is still 146.8MB. Free memory was 119.2MB in the beginning and 110.4MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:12:03,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 65.6MB in the beginning and 65.6MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.97ms. Allocated memory was 94.4MB in the beginning and 146.8MB in the end (delta: 52.4MB). Free memory was 58.5MB in the beginning and 121.3MB in the end (delta: -62.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.41ms. Allocated memory is still 146.8MB. Free memory was 121.3MB in the beginning and 120.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.51ms. Allocated memory is still 146.8MB. Free memory was 120.0MB in the beginning and 119.2MB in the end (delta: 853.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 265.41ms. Allocated memory is still 146.8MB. Free memory was 119.2MB in the beginning and 110.4MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:12:03,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl --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 d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:12:05,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:12:05,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:12:05,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:12:05,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:12:05,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:12:05,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:12:05,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:12:05,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:12:05,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:12:05,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:12:05,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:12:05,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:12:05,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:12:05,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:12:05,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:12:05,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:12:05,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:12:05,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:12:05,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:12:05,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:12:05,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:12:05,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:12:05,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:12:05,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:12:05,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:12:05,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:12:05,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:12:05,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:12:05,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:12:05,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:12:05,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:12:05,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:12:05,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:12:05,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:12:05,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:12:05,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:12:05,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:12:05,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:12:05,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:12:05,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:12:05,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:12:05,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:12:05,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:12:05,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:12:05,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:12:05,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:12:05,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:12:05,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:12:05,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:12:05,793 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:12:05,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:12:05,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:12:05,795 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:12:05,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:12:05,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:12:05,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:12:05,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:12:05,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:12:05,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:12:05,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:12:05,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:12:05,798 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:12:05,799 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:12:05,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:12:05,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:12:05,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:12:05,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:12:05,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:12:05,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:12:05,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:12:05,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:12:05,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:12:05,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:12:05,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:12:05,802 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:12:05,802 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:05,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:12:05,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:12:05,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:12:05,803 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28004f57c6988e792d07d7254dfd532aeffd19f38063d85c3bfa2c0f504914f [2021-11-23 17:12:06,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:12:06,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:12:06,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:12:06,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:12:06,274 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:12:06,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-11-23 17:12:06,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/5a3662914/56b2d90550e3407e839592173529f677/FLAGdba7ccc98 [2021-11-23 17:12:06,932 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:12:06,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c [2021-11-23 17:12:06,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/5a3662914/56b2d90550e3407e839592173529f677/FLAGdba7ccc98 [2021-11-23 17:12:07,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/data/5a3662914/56b2d90550e3407e839592173529f677 [2021-11-23 17:12:07,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:12:07,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:12:07,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:12:07,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:12:07,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:12:07,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f00d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07, skipping insertion in model container [2021-11-23 17:12:07,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:12:07,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:12:07,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-23 17:12:07,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:12:07,518 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:12:07,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-11-23 17:12:07,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:12:07,555 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:12:07,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07 WrapperNode [2021-11-23 17:12:07,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:12:07,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:12:07,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:12:07,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:12:07,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,611 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-23 17:12:07,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:12:07,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:12:07,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:12:07,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:12:07,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:12:07,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:12:07,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:12:07,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:12:07,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (1/1) ... [2021-11-23 17:12:07,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:12:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:07,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:12:07,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:12:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:12:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:12:07,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:12:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:12:07,780 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:12:07,782 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:12:07,881 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:12:07,887 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:12:07,887 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:12:07,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:12:07 BoogieIcfgContainer [2021-11-23 17:12:07,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:12:07,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:12:07,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:12:07,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:12:07,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:12:07" (1/3) ... [2021-11-23 17:12:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31445c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:12:07, skipping insertion in model container [2021-11-23 17:12:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:12:07" (2/3) ... [2021-11-23 17:12:07,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31445c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:12:07, skipping insertion in model container [2021-11-23 17:12:07,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:12:07" (3/3) ... [2021-11-23 17:12:07,912 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-11-23 17:12:07,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:12:07,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:12:07,983 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:12:07,991 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:12:07,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:12:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 17:12:08,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:08,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 17:12:08,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-11-23 17:12:08,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200716479] [2021-11-23 17:12:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:08,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:08,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:08,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:12:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:08,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:08,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:08,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200716479] [2021-11-23 17:12:08,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200716479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:08,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:08,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:08,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957919061] [2021-11-23 17:12:08,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:08,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:08,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:08,293 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:08,330 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-23 17:12:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 17:12:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:08,342 INFO L225 Difference]: With dead ends: 28 [2021-11-23 17:12:08,342 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 17:12:08,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:08,352 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:08,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 17:12:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-11-23 17:12:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-23 17:12:08,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2021-11-23 17:12:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:08,396 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-23 17:12:08,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-23 17:12:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:12:08,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:08,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:08,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:12:08,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:08,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2021-11-23 17:12:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:08,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181053693] [2021-11-23 17:12:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:08,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:08,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:08,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:12:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:08,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:08,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181053693] [2021-11-23 17:12:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181053693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:08,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:08,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:08,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235990548] [2021-11-23 17:12:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:08,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:08,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:08,731 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:08,755 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-23 17:12:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 17:12:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:08,759 INFO L225 Difference]: With dead ends: 19 [2021-11-23 17:12:08,759 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:12:08,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:08,762 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:08,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:12:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-23 17:12:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-23 17:12:08,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-23 17:12:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:08,774 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-23 17:12:08,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-23 17:12:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:12:08,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:08,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:08,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:08,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:08,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2021-11-23 17:12:08,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:08,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677277178] [2021-11-23 17:12:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:08,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:08,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:09,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:09,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:12:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:09,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:09,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:09,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677277178] [2021-11-23 17:12:09,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677277178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538358182] [2021-11-23 17:12:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:09,182 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:09,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:09,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:12:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:09,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:09,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538358182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:09,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850641748] [2021-11-23 17:12:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:09,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:12:09,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:09,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:12:09,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:12:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:12:09,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:12:09,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850641748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:09,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:12:09,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-11-23 17:12:09,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613886187] [2021-11-23 17:12:09,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:12:09,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:12:09,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:12:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:12:09,546 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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) [2021-11-23 17:12:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:10,016 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-23 17:12:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 17:12:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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) Word has length 10 [2021-11-23 17:12:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:10,018 INFO L225 Difference]: With dead ends: 58 [2021-11-23 17:12:10,018 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 17:12:10,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:12:10,021 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:10,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:12:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 17:12:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 17:12:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-23 17:12:10,034 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 10 [2021-11-23 17:12:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-23 17:12:10,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 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) [2021-11-23 17:12:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-23 17:12:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 17:12:10,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:10,037 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 17:12:10,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:10,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:12:10,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:10,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:10,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1210414118, now seen corresponding path program 2 times [2021-11-23 17:12:10,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428125020] [2021-11-23 17:12:10,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:12:10,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:10,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:10,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:12:10,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:12:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 127 proven. 16 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 17:12:10,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 127 proven. 16 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 17:12:11,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:11,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428125020] [2021-11-23 17:12:11,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428125020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:11,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [790530681] [2021-11-23 17:12:11,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:12:11,047 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:11,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:11,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:11,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:12:11,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:12:11,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 127 proven. 16 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 17:12:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 127 proven. 16 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 17:12:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [790530681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:11,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056789512] [2021-11-23 17:12:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:12:11,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:12:11,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:12:11,425 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:12:11,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:12:11,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:12:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:12:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:12:12,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056789512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:12,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:12:12,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 22 [2021-11-23 17:12:12,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000291509] [2021-11-23 17:12:12,041 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:12:12,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:12:12,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:12:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:12:12,043 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:13,257 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-11-23 17:12:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 17:12:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 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 49 [2021-11-23 17:12:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:13,262 INFO L225 Difference]: With dead ends: 134 [2021-11-23 17:12:13,262 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 17:12:13,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=2770, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 17:12:13,265 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:13,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 73 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 17:12:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 17:12:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 17:12:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-11-23 17:12:13,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 49 [2021-11-23 17:12:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:13,289 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-11-23 17:12:13,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-11-23 17:12:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 17:12:13,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:13,292 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-23 17:12:13,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:13,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:13,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:13,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:13,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1766438950, now seen corresponding path program 3 times [2021-11-23 17:12:13,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:13,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755637549] [2021-11-23 17:12:13,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:12:13,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:13,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:13,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:13,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:12:13,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 17:12:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:12:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:12:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-23 17:12:14,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:14,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:14,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755637549] [2021-11-23 17:12:14,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755637549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:14,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:12:14,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916142902] [2021-11-23 17:12:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:12:14,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:12:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:12:14,372 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:14,484 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-11-23 17:12:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:12:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 95 [2021-11-23 17:12:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:14,486 INFO L225 Difference]: With dead ends: 96 [2021-11-23 17:12:14,486 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 17:12:14,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:12:14,488 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:14,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:12:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 17:12:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 17:12:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 17:12:14,490 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2021-11-23 17:12:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:14,491 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 17:12:14,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:12:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 17:12:14,491 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 17:12:14,494 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 17:12:14,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:14,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:14,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 17:12:15,025 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 17:12:15,025 INFO L858 garLoopResultBuilder]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L854 garLoopResultBuilder]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (bvslt |ULTIMATE.start_main_~a~0#1| (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) |ULTIMATE.start_main_~b~0#1|) (_ bv6 32))) [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L861 garLoopResultBuilder]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-11-23 17:12:15,026 INFO L858 garLoopResultBuilder]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-11-23 17:12:15,027 INFO L854 garLoopResultBuilder]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (bvslt (bvadd (_ bv4294967295 32) |ULTIMATE.start_main_~a~0#1|) (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) |ULTIMATE.start_main_~b~0#1|) (_ bv6 32)) (not (bvslt |ULTIMATE.start_main_~b~0#1| (_ bv6 32)))) [2021-11-23 17:12:15,027 INFO L858 garLoopResultBuilder]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-11-23 17:12:15,030 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-23 17:12:15,031 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 17:12:15,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:12:15 BoogieIcfgContainer [2021-11-23 17:12:15,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 17:12:15,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 17:12:15,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 17:12:15,044 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 17:12:15,044 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:12:07" (3/4) ... [2021-11-23 17:12:15,047 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 17:12:15,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-23 17:12:15,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 17:12:15,058 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 17:12:15,058 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 17:12:15,087 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/witness.graphml [2021-11-23 17:12:15,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 17:12:15,088 INFO L158 Benchmark]: Toolchain (without parser) took 7767.74ms. Allocated memory was 50.3MB in the beginning and 81.8MB in the end (delta: 31.5MB). Free memory was 24.9MB in the beginning and 46.3MB in the end (delta: -21.4MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,088 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 50.3MB. Free memory was 31.3MB in the beginning and 31.2MB in the end (delta: 32.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:12:15,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.38ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 24.7MB in the beginning and 50.7MB in the end (delta: -26.0MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.58ms. Allocated memory is still 67.1MB. Free memory was 50.7MB in the beginning and 49.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,089 INFO L158 Benchmark]: Boogie Preprocessor took 25.01ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 48.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:12:15,090 INFO L158 Benchmark]: RCFGBuilder took 251.25ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 39.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,090 INFO L158 Benchmark]: TraceAbstraction took 7151.64ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 39.3MB in the beginning and 48.3MB in the end (delta: -9.0MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,090 INFO L158 Benchmark]: Witness Printer took 43.63ms. Allocated memory is still 81.8MB. Free memory was 48.3MB in the beginning and 46.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:12:15,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 50.3MB. Free memory was 31.3MB in the beginning and 31.2MB in the end (delta: 32.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.38ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 24.7MB in the beginning and 50.7MB in the end (delta: -26.0MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.58ms. Allocated memory is still 67.1MB. Free memory was 50.7MB in the beginning and 49.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.01ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 48.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 251.25ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 39.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7151.64ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 39.3MB in the beginning and 48.3MB in the end (delta: -9.0MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. * Witness Printer took 43.63ms. Allocated memory is still 81.8MB. Free memory was 48.3MB in the beginning and 46.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 26]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 5, TraceHistogramMax: 36, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 153 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 153 mSDsluCounter, 129 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 90 mSDsCounter, 132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 889 IncrementalHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 132 mSolverCounterUnsat, 39 mSDtfsCounter, 889 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 502 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=4, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 53 NumberOfFragments, 25 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 825 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 285 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 447 ConstructedInterpolants, 0 QuantifiedInterpolants, 969 SizeOfPredicates, 10 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 2902/3496 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ~bvslt32(a, 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, b), 6bv32) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (~bvslt32(~bvadd64(4294967295bv32, a), 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, b), 6bv32)) && !~bvslt32(b, 6bv32) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-23 17:12:15,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43682881-58f8-4885-90a4-eb19cdfb8fa8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE