./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.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_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/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_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/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_01f8a10c-905d-4863-9083-bafee3caad5d/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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:50:49,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:50:49,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:50:49,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:50:49,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:50:49,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:50:49,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:50:49,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:50:49,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:50:49,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:50:49,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:50:49,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:50:49,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:50:49,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:50:49,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:50:49,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:50:49,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:50:49,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:50:49,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:50:49,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:50:49,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:50:49,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:50:49,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:50:49,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:50:49,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:50:49,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:50:49,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:50:49,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:50:49,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:50:49,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:50:49,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:50:49,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:50:49,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:50:49,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:50:49,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:50:49,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:50:49,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:50:49,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:50:49,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:50:49,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:50:49,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:50:49,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:50:49,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:50:49,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:50:49,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:50:49,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:50:49,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:50:49,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:50:49,392 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:50:49,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:50:49,392 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:50:49,393 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:50:49,394 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:50:49,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:50:49,394 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:50:49,394 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:50:49,395 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:50:49,395 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:50:49,395 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:50:49,395 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:50:49,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:50:49,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:50:49,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:50:49,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:50:49,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:50:49,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:50:49,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:50:49,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:50:49,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:50:49,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:50:49,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:50:49,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:50:49,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:50:49,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:50:49,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:50:49,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:50:49,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:50:49,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:50:49,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:50:49,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:50:49,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:50:49,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:50:49,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:50:49,411 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_01f8a10c-905d-4863-9083-bafee3caad5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2021-11-23 16:50:49,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:50:49,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:50:49,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:50:49,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:50:49,779 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:50:49,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2021-11-23 16:50:49,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e823d74ca/d2181c69cb3741a08eb5a4e2eb54f15f/FLAGbf6a9f269 [2021-11-23 16:50:50,375 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:50:50,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2021-11-23 16:50:50,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e823d74ca/d2181c69cb3741a08eb5a4e2eb54f15f/FLAGbf6a9f269 [2021-11-23 16:50:50,739 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e823d74ca/d2181c69cb3741a08eb5a4e2eb54f15f [2021-11-23 16:50:50,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:50:50,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:50:50,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:50:50,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:50:50,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:50:50,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:50:50" (1/1) ... [2021-11-23 16:50:50,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4510dabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:50, skipping insertion in model container [2021-11-23 16:50:50,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:50:50" (1/1) ... [2021-11-23 16:50:50,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:50:50,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:50:50,974 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_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2021-11-23 16:50:50,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:50:50,989 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:50:51,009 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_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2021-11-23 16:50:51,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:50:51,027 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:50:51,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51 WrapperNode [2021-11-23 16:50:51,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:50:51,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:50:51,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:50:51,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:50:51,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,070 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2021-11-23 16:50:51,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:50:51,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:50:51,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:50:51,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:50:51,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:50:51,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:50:51,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:50:51,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:50:51,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:51" (1/1) ... [2021-11-23 16:50:51,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:50:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:51,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:50:51,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:50:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:50:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:50:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:50:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:50:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:50:51,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:50:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:50:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:50:51,263 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:50:51,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:50:51,409 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:50:51,450 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 16:50:51,468 INFO L158 Benchmark]: Toolchain (without parser) took 723.57ms. Allocated memory is still 92.3MB. Free memory was 49.9MB in the beginning and 55.0MB in the end (delta: -5.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:50:51,470 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 65.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:50:51,471 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.66ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 67.8MB in the end (delta: -18.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 16:50:51,472 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.52ms. Allocated memory is still 92.3MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:50:51,473 INFO L158 Benchmark]: Boogie Preprocessor took 47.81ms. Allocated memory is still 92.3MB. Free memory was 66.2MB in the beginning and 65.2MB in the end (delta: 985.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:50:51,475 INFO L158 Benchmark]: RCFGBuilder took 346.21ms. Allocated memory is still 92.3MB. Free memory was 65.2MB in the beginning and 55.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:50:51,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 65.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.66ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 67.8MB in the end (delta: -18.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.52ms. Allocated memory is still 92.3MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.81ms. Allocated memory is still 92.3MB. Free memory was 66.2MB in the beginning and 65.2MB in the end (delta: 985.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 346.21ms. Allocated memory is still 92.3MB. Free memory was 65.2MB in the beginning and 55.0MB in the end (delta: 10.2MB). 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 16:50:51,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/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_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/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_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/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_01f8a10c-905d-4863-9083-bafee3caad5d/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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:50:54,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:50:54,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:50:54,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:50:54,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:50:54,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:50:54,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:50:54,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:50:54,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:50:54,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:50:54,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:50:54,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:50:54,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:50:54,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:50:54,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:50:54,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:50:54,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:50:54,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:50:54,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:50:54,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:50:54,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:50:54,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:50:54,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:50:54,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:50:54,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:50:54,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:50:54,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:50:54,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:50:54,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:50:54,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:50:54,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:50:54,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:50:54,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:50:54,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:50:54,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:50:54,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:50:54,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:50:54,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:50:54,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:50:54,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:50:54,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:50:54,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:50:54,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:50:54,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:50:54,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:50:54,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:50:54,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:50:54,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:50:54,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:50:54,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:50:54,456 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:50:54,457 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:50:54,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:50:54,458 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:50:54,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:50:54,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:50:54,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:50:54,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:50:54,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:50:54,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:50:54,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:50:54,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:50:54,462 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:50:54,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:50:54,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:50:54,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:50:54,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:50:54,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:50:54,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:50:54,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:50:54,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:50:54,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:50:54,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:50:54,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:50:54,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:50:54,466 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:50:54,467 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:54,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:50:54,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:50:54,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:50:54,468 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_01f8a10c-905d-4863-9083-bafee3caad5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2021-11-23 16:50:54,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:50:54,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:50:54,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:50:54,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:50:54,952 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:50:54,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2021-11-23 16:50:55,049 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e16f7615a/67988026750b4698ba1c4b7f760e38de/FLAGfd0a965fb [2021-11-23 16:50:55,648 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:50:55,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2021-11-23 16:50:55,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e16f7615a/67988026750b4698ba1c4b7f760e38de/FLAGfd0a965fb [2021-11-23 16:50:56,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/data/e16f7615a/67988026750b4698ba1c4b7f760e38de [2021-11-23 16:50:56,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:50:56,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:50:56,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:50:56,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:50:56,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:50:56,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae834dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56, skipping insertion in model container [2021-11-23 16:50:56,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:50:56,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:50:56,200 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_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2021-11-23 16:50:56,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:50:56,216 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:50:56,246 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_01f8a10c-905d-4863-9083-bafee3caad5d/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2021-11-23 16:50:56,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:50:56,265 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:50:56,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56 WrapperNode [2021-11-23 16:50:56,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:50:56,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:50:56,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:50:56,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:50:56,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,319 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2021-11-23 16:50:56,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:50:56,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:50:56,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:50:56,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:50:56,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:50:56,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:50:56,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:50:56,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:50:56,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (1/1) ... [2021-11-23 16:50:56,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:50:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:56,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:50:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:50:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:50:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:50:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:50:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:50:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:50:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:50:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:50:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:50:56,610 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:50:56,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:50:56,844 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:50:56,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:50:56,851 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:50:56,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:50:56 BoogieIcfgContainer [2021-11-23 16:50:56,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:50:56,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:50:56,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:50:56,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:50:56,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:50:56" (1/3) ... [2021-11-23 16:50:56,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567eef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:50:56, skipping insertion in model container [2021-11-23 16:50:56,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:50:56" (2/3) ... [2021-11-23 16:50:56,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567eef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:50:56, skipping insertion in model container [2021-11-23 16:50:56,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:50:56" (3/3) ... [2021-11-23 16:50:56,864 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2021-11-23 16:50:56,871 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:50:56,871 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:50:56,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:50:56,936 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 16:50:56,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:50:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:50:56,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:56,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:56,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:57,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2021-11-23 16:50:57,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:57,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283464382] [2021-11-23 16:50:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:57,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:57,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:57,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:57,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:50:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:57,360 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 16:50:57,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:57,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283464382] [2021-11-23 16:50:57,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283464382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:57,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:57,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:57,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104752309] [2021-11-23 16:50:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:57,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:57,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:57,425 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:57,473 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2021-11-23 16:50:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 16:50:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:57,487 INFO L225 Difference]: With dead ends: 26 [2021-11-23 16:50:57,488 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 16:50:57,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 16:50:57,499 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:57,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 16:50:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-23 16:50:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 16:50:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 16:50:57,562 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-11-23 16:50:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:57,563 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 16:50:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 16:50:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:50:57,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:57,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:57,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:57,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2021-11-23 16:50:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:57,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838317006] [2021-11-23 16:50:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:57,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:57,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:57,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:50:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:57,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:58,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838317006] [2021-11-23 16:50:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838317006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164190985] [2021-11-23 16:50:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:58,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:58,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:58,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 16:50:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:58,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [164190985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686273511] [2021-11-23 16:50:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:58,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:58,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:58,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 16:50:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:50:58,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686273511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:58,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:50:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4, 4] total 9 [2021-11-23 16:50:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440370235] [2021-11-23 16:50:58,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:58,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:58,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:58,509 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:50:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:58,574 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-23 16:50:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:50:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 16:50:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:58,577 INFO L225 Difference]: With dead ends: 17 [2021-11-23 16:50:58,577 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 16:50:58,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:50:58,582 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:58,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 16:50:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 16:50:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-23 16:50:58,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-11-23 16:50:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-23 16:50:58,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:50:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-23 16:50:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:50:58,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:58,610 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:58,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:58,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-23 16:50:59,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 16:50:59,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:59,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1523215281, now seen corresponding path program 1 times [2021-11-23 16:50:59,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269230054] [2021-11-23 16:50:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:59,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:59,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:59,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:59,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:50:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:59,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269230054] [2021-11-23 16:50:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269230054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [112479454] [2021-11-23 16:50:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:59,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:59,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:59,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 16:50:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:59,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:59,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [112479454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851737746] [2021-11-23 16:50:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:59,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:59,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:59,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 16:50:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:59,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851737746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:59,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:59,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 16:50:59,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129299311] [2021-11-23 16:50:59,712 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:59,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:59,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:59,714 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:59,766 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 16:50:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 16:50:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:59,767 INFO L225 Difference]: With dead ends: 29 [2021-11-23 16:50:59,767 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 16:50:59,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:59,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:59,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 16:50:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 16:50:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-23 16:50:59,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-11-23 16:50:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:59,776 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-23 16:50:59,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-23 16:50:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 16:50:59,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:59,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:00,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:00,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:00,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:00,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 2 times [2021-11-23 16:51:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213625771] [2021-11-23 16:51:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:00,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:51:00,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:00,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213625771] [2021-11-23 16:51:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213625771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:00,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259807134] [2021-11-23 16:51:00,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:00,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:00,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:00,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 16:51:00,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:00,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:00,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:00,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:00,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:01,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259807134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089995101] [2021-11-23 16:51:01,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:01,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:01,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:01,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:01,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 16:51:01,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:51:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:01,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:51:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 16:51:01,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:01,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 16:51:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:51:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 16:51:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089995101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:01,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 23 [2021-11-23 16:51:01,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635315665] [2021-11-23 16:51:01,978 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:01,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 16:51:01,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 16:51:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:51:01,981 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:03,082 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-11-23 16:51:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 16:51:03,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 16:51:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:03,084 INFO L225 Difference]: With dead ends: 47 [2021-11-23 16:51:03,084 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 16:51:03,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 16:51:03,086 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:03,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:51:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 16:51:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 16:51:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-23 16:51:03,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 19 [2021-11-23 16:51:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-23 16:51:03,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-23 16:51:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:51:03,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:03,096 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:03,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:03,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:03,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:03,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash -58152701, now seen corresponding path program 3 times [2021-11-23 16:51:03,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728856987] [2021-11-23 16:51:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:03,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:03,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:03,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:03,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:51:03,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:51:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 16:51:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:03,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:04,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:04,408 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-23 16:51:04,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 47 [2021-11-23 16:51:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 16:51:04,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-11-23 16:51:05,470 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 16:51:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 66 [2021-11-23 16:51:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 16:51:05,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728856987] [2021-11-23 16:51:05,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728856987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097565966] [2021-11-23 16:51:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:05,610 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:05,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:05,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 16:51:05,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:51:05,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:51:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:06,091 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-23 16:51:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 47 [2021-11-23 16:51:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 16:51:06,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-11-23 16:51:06,502 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 16:51:06,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 66 [2021-11-23 16:51:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 16:51:06,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097565966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:06,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115033008] [2021-11-23 16:51:06,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:06,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:06,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:06,559 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 16:51:06,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:51:06,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:51:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:06,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:06,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:06,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:06,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:07,007 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-23 16:51:07,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 47 [2021-11-23 16:51:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 16:51:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-11-23 16:51:07,365 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 16:51:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 66 [2021-11-23 16:51:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 16:51:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115033008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:07,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13, 11, 12, 11] total 22 [2021-11-23 16:51:07,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903938054] [2021-11-23 16:51:07,423 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:07,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 16:51:07,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 16:51:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:51:07,425 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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 16:51:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:08,976 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-23 16:51:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 16:51:08,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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 35 [2021-11-23 16:51:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:08,979 INFO L225 Difference]: With dead ends: 50 [2021-11-23 16:51:08,980 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 16:51:08,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 16:51:08,982 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:08,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 53 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:51:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 16:51:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 16:51:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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 16:51:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-23 16:51:08,992 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2021-11-23 16:51:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:08,993 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-23 16:51:08,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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 16:51:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-23 16:51:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 16:51:08,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:08,996 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:09,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 16:51:09,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:09,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:09,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:09,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1984115983, now seen corresponding path program 4 times [2021-11-23 16:51:09,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:09,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89407902] [2021-11-23 16:51:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:51:09,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:09,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:09,631 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:09,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:51:09,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:51:09,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:51:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:10,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:10,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89407902] [2021-11-23 16:51:10,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89407902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23361132] [2021-11-23 16:51:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:51:10,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:10,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:10,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 16:51:10,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:51:10,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:51:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:10,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23361132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712232742] [2021-11-23 16:51:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:51:10,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:10,939 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:10,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 16:51:11,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:51:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:51:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712232742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:11,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:11,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 16:51:11,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879144350] [2021-11-23 16:51:11,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:11,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 16:51:11,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 16:51:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:51:11,286 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 16:51:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:12,617 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-23 16:51:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 16:51:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 43 [2021-11-23 16:51:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:12,621 INFO L225 Difference]: With dead ends: 89 [2021-11-23 16:51:12,621 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 16:51:12,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 16:51:12,625 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:12,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:51:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 16:51:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-23 16:51:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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 16:51:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-23 16:51:12,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 43 [2021-11-23 16:51:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:12,637 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-23 16:51:12,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 16:51:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-23 16:51:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 16:51:12,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:12,640 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:12,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:12,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:13,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 16:51:13,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:13,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash -947041545, now seen corresponding path program 5 times [2021-11-23 16:51:13,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:13,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018168333] [2021-11-23 16:51:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:13,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:13,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:13,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:51:13,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 16:51:13,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:51:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:14,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:15,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018168333] [2021-11-23 16:51:15,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018168333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813976846] [2021-11-23 16:51:15,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:15,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:15,769 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:51:17,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 16:51:17,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:51:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:17,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:51:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813976846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:17,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905738062] [2021-11-23 16:51:17,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:17,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:17,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:17,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:18,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:53:26,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 16:53:26,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:53:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:53:27,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 16:53:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905738062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:30,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:30,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 26] total 70 [2021-11-23 16:53:30,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112672787] [2021-11-23 16:53:30,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:30,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-23 16:53:30,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-23 16:53:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1425, Invalid=3405, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 16:53:30,683 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 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 16:53:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:40,386 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2021-11-23 16:53:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 16:53:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 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 67 [2021-11-23 16:53:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:40,404 INFO L225 Difference]: With dead ends: 137 [2021-11-23 16:53:40,404 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 16:53:40,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=2783, Invalid=5773, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 16:53:40,408 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 244 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:40,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 207 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 16:53:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 16:53:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-23 16:53:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 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 16:53:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-11-23 16:53:40,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 67 [2021-11-23 16:53:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:40,427 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-11-23 16:53:40,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 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 16:53:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-11-23 16:53:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 16:53:40,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:40,432 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:40,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:40,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:40,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:41,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:41,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:41,046 INFO L85 PathProgramCache]: Analyzing trace with hash -796012857, now seen corresponding path program 6 times [2021-11-23 16:53:41,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:41,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055657133] [2021-11-23 16:53:41,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:53:41,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:41,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:53:41,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-23 16:53:41,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:53:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:42,988 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-11-23 16:53:42,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 87 [2021-11-23 16:53:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 16:53:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:46,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 97 [2021-11-23 16:53:46,545 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-11-23 16:53:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 158 [2021-11-23 16:53:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 16:53:46,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055657133] [2021-11-23 16:53:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055657133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392158005] [2021-11-23 16:53:46,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:53:46,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:46,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:46,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:46,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 16:53:47,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-23 16:53:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 16:53:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:47,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:48,913 INFO L354 Elim1Store]: treesize reduction 28, result has 66.3 percent of original size [2021-11-23 16:53:48,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 89 [2021-11-23 16:53:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 91 proven. 56 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-23 16:53:49,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 16:53:55,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392158005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:55,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156608367] [2021-11-23 16:53:55,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:53:55,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:55,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:55,835 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 16:53:58,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-23 16:53:58,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:53:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:59,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:59,289 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-11-23 16:53:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 87 [2021-11-23 16:53:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 16:53:59,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 97 [2021-11-23 16:54:00,398 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-11-23 16:54:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 158 [2021-11-23 16:54:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-23 16:54:00,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156608367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:00,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:00,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 23, 20, 20, 19] total 59 [2021-11-23 16:54:00,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714426960] [2021-11-23 16:54:00,597 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:00,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 16:54:00,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 16:54:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=2842, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 16:54:00,601 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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 16:54:09,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:11,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:13,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:15,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:17,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:19,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:21,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:23,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:25,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:27,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:29,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:31,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:33,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:40,600 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-11-23 16:54:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 16:54:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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 115 [2021-11-23 16:54:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:40,604 INFO L225 Difference]: With dead ends: 142 [2021-11-23 16:54:40,604 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 16:54:40,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 620 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1874, Invalid=7632, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 16:54:40,609 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 159 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 124 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:40,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 69 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 601 Invalid, 13 Unknown, 17 Unchecked, 28.3s Time] [2021-11-23 16:54:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 16:54:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-23 16:54:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 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 16:54:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-11-23 16:54:40,637 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 115 [2021-11-23 16:54:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:40,638 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-11-23 16:54:40,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 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 16:54:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-11-23 16:54:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 16:54:40,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:40,642 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:40,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:40,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:41,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:41,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:41,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -348718590, now seen corresponding path program 7 times [2021-11-23 16:54:41,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:41,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667665767] [2021-11-23 16:54:41,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:54:41,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:41,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:41,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:54:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 16:54:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:42,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:49,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:49,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667665767] [2021-11-23 16:54:49,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667665767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:49,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124529094] [2021-11-23 16:54:49,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:54:49,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:49,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:49,982 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:49,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 16:54:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 16:54:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:50,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:51,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124529094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757927146] [2021-11-23 16:54:51,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:54:51,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:51,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:51,181 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:51,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 16:54:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 16:54:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:51,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:54:52,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757927146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:52,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:52,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 49, 49, 49] total 96 [2021-11-23 16:54:52,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456086847] [2021-11-23 16:54:52,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:52,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 16:54:52,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 16:54:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 16:54:52,091 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 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 16:55:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:56,744 INFO L93 Difference]: Finished difference Result 269 states and 318 transitions. [2021-11-23 16:55:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 16:55:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 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 133 [2021-11-23 16:55:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:56,747 INFO L225 Difference]: With dead ends: 269 [2021-11-23 16:55:56,747 INFO L226 Difference]: Without dead ends: 230 [2021-11-23 16:55:56,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=6814, Invalid=13208, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 16:55:56,754 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 4702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:56,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 410 Invalid, 4702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4608 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 16:55:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-23 16:55:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-23 16:55:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 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 16:55:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2021-11-23 16:55:56,794 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 133 [2021-11-23 16:55:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:56,794 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2021-11-23 16:55:56,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 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 16:55:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2021-11-23 16:55:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-23 16:55:56,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:56,809 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:55:56,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:57,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-23 16:55:57,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:55:57,424 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2103789150, now seen corresponding path program 8 times [2021-11-23 16:55:57,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:57,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538458301] [2021-11-23 16:55:57,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:55:57,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:57,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:57,433 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:57,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:55:57,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:55:57,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:55:57,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 16:55:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:29,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538458301] [2021-11-23 16:56:29,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538458301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897858198] [2021-11-23 16:56:29,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:56:29,658 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:29,659 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:29,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 16:56:30,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:56:30,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:56:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 16:56:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:31,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:31,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [897858198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140559592] [2021-11-23 16:56:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:56:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:31,889 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8a10c-905d-4863-9083-bafee3caad5d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 16:56:32,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:56:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:56:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 16:56:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9108 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 16:56:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140559592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:33,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:33,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97, 97, 97, 97] total 192 [2021-11-23 16:56:33,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831621800] [2021-11-23 16:56:33,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:33,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-23 16:56:33,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-23 16:56:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9406, Invalid=27266, Unknown=0, NotChecked=0, Total=36672 [2021-11-23 16:56:33,752 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 192 states, 192 states have (on average 2.0208333333333335) internal successors, (388), 192 states have internal predecessors, (388), 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)