./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label51.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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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 c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:51,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:51,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:51,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:51,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:51,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:51,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:51,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:51,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:51,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:51,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:51,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:51,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:51,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:51,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:51,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:51,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:51,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:51,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:51,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:51,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:51,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:51,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:51,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:51,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:51,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:51,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:51,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:51,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:51,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:51,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:51,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:51,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:51,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:51,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:51,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:51,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:51,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:51,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:51,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:51,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:51,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:51,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:51,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:51,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:51,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:51,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:51,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:51,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:51,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:51,370 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:51,370 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:51,371 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:51,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:51,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:51,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:51,372 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:51,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:51,373 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:51,373 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:51,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:51,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:51,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:51,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:51,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:51,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:51,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:51,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:51,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:51,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:51,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:51,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:51,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:51,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:51,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:51,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:51,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:51,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:51,380 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:51,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:51,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:51,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:51,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:51,381 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 [2021-11-23 16:45:51,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:51,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:51,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:51,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:51,689 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:51,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-11-23 16:45:51,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/11712b56c/447c4924740e4213838649b97ca86614/FLAG79985331d [2021-11-23 16:45:52,935 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:52,936 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-11-23 16:45:52,992 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/11712b56c/447c4924740e4213838649b97ca86614/FLAG79985331d [2021-11-23 16:45:53,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/11712b56c/447c4924740e4213838649b97ca86614 [2021-11-23 16:45:53,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:53,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:53,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:53,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:53,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:53,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:53" (1/1) ... [2021-11-23 16:45:53,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e96dc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:53, skipping insertion in model container [2021-11-23 16:45:53,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:53" (1/1) ... [2021-11-23 16:45:53,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:53,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:53,923 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-11-23 16:45:55,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:55,413 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:55,455 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-11-23 16:45:56,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:56,378 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:56,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56 WrapperNode [2021-11-23 16:45:56,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:56,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:56,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:56,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:56,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:56,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:57,173 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 16:45:57,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:57,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:57,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:57,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:57,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:57,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:57,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:57,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:58,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:58,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:58,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:58,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:58,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:58,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:58,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:58,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:56" (1/1) ... [2021-11-23 16:45:58,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:58,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:58,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:58,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:58,671 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:58,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:05,631 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:05,722 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 16:46:05,728 INFO L158 Benchmark]: Toolchain (without parser) took 12382.38ms. Allocated memory was 121.6MB in the beginning and 539.0MB in the end (delta: 417.3MB). Free memory was 70.3MB in the beginning and 188.4MB in the end (delta: -118.1MB). Peak memory consumption was 305.9MB. Max. memory is 16.1GB. [2021-11-23 16:46:05,732 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:05,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3032.04ms. Allocated memory was 121.6MB in the beginning and 167.8MB in the end (delta: 46.1MB). Free memory was 70.0MB in the beginning and 77.5MB in the end (delta: -7.5MB). Peak memory consumption was 64.0MB. Max. memory is 16.1GB. [2021-11-23 16:46:05,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 792.75ms. Allocated memory was 167.8MB in the beginning and 268.4MB in the end (delta: 100.7MB). Free memory was 77.5MB in the beginning and 116.7MB in the end (delta: -39.2MB). Peak memory consumption was 59.4MB. Max. memory is 16.1GB. [2021-11-23 16:46:05,737 INFO L158 Benchmark]: Boogie Preprocessor took 1156.53ms. Allocated memory is still 268.4MB. Free memory was 116.7MB in the beginning and 96.6MB in the end (delta: 20.2MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2021-11-23 16:46:05,739 INFO L158 Benchmark]: RCFGBuilder took 7391.62ms. Allocated memory was 268.4MB in the beginning and 539.0MB in the end (delta: 270.5MB). Free memory was 96.6MB in the beginning and 188.4MB in the end (delta: -91.8MB). Peak memory consumption was 187.1MB. Max. memory is 16.1GB. [2021-11-23 16:46:05,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 81.8MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3032.04ms. Allocated memory was 121.6MB in the beginning and 167.8MB in the end (delta: 46.1MB). Free memory was 70.0MB in the beginning and 77.5MB in the end (delta: -7.5MB). Peak memory consumption was 64.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 792.75ms. Allocated memory was 167.8MB in the beginning and 268.4MB in the end (delta: 100.7MB). Free memory was 77.5MB in the beginning and 116.7MB in the end (delta: -39.2MB). Peak memory consumption was 59.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 1156.53ms. Allocated memory is still 268.4MB. Free memory was 116.7MB in the beginning and 96.6MB in the end (delta: 20.2MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. * RCFGBuilder took 7391.62ms. Allocated memory was 268.4MB in the beginning and 539.0MB in the end (delta: 270.5MB). Free memory was 96.6MB in the beginning and 188.4MB in the end (delta: -91.8MB). Peak memory consumption was 187.1MB. 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 16:46:05,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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 c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:08,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:08,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:08,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:08,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:08,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:08,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:08,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:08,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:08,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:08,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:08,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:08,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:08,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:08,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:08,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:08,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:08,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:08,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:08,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:08,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:08,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:08,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:08,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:08,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:08,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:08,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:08,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:08,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:08,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:08,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:08,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:08,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:08,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:08,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:08,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:08,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:08,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:08,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:08,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:08,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:08,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:46:08,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:08,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:08,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:08,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:08,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:08,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:08,878 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:08,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:08,879 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:08,879 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:08,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:08,881 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:08,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:08,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:08,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:08,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:08,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:08,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:08,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:08,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:46:08,885 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:46:08,885 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:46:08,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:08,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:08,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:08,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:08,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:08,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:46:08,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:08,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:08,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:08,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:08,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:08,889 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:46:08,890 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:08,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:08,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:08,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:08,891 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e1c745de50239709fa60c913e491a1f371528f5baa59b32c10ff978467292 [2021-11-23 16:46:09,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:09,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:09,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:09,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:09,428 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:09,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-11-23 16:46:09,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/4915a481a/0682c162728345fa927b3bb8d62150f4/FLAGde655bd1a [2021-11-23 16:46:10,601 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:10,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c [2021-11-23 16:46:10,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/4915a481a/0682c162728345fa927b3bb8d62150f4/FLAGde655bd1a [2021-11-23 16:46:10,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/data/4915a481a/0682c162728345fa927b3bb8d62150f4 [2021-11-23 16:46:10,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:10,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:10,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:10,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:10,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:10,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:10" (1/1) ... [2021-11-23 16:46:10,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b96d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:10, skipping insertion in model container [2021-11-23 16:46:10,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:10" (1/1) ... [2021-11-23 16:46:11,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:11,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:11,663 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-11-23 16:46:13,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:13,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:13,403 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_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/sv-benchmarks/c/eca-rers2012/Problem13_label51.c[3668,3681] [2021-11-23 16:46:14,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:14,429 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:14,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14 WrapperNode [2021-11-23 16:46:14,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:14,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:14,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:14,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:14,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,792 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 16:46:14,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:14,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:14,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:14,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:14,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:15,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:15,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:15,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:15,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:15,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:15,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:15,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:15,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:15,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:15,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:15,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:46:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:15,654 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:15,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:47:12,297 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:47:12,329 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:47:12,329 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:47:12,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:12 BoogieIcfgContainer [2021-11-23 16:47:12,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:47:12,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:47:12,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:47:12,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:47:12,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:46:10" (1/3) ... [2021-11-23 16:47:12,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acdd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:12, skipping insertion in model container [2021-11-23 16:47:12,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (2/3) ... [2021-11-23 16:47:12,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acdd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:12, skipping insertion in model container [2021-11-23 16:47:12,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:12" (3/3) ... [2021-11-23 16:47:12,346 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label51.c [2021-11-23 16:47:12,353 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:47:12,353 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:47:12,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:47:12,434 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 16:47:12,435 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:47:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 16:47:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:47:12,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:12,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:12,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:12,522 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-11-23 16:47:12,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113745562] [2021-11-23 16:47:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:12,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:12,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:12,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:47:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:12,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:12,929 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 16:47:12,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:12,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:12,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113745562] [2021-11-23 16:47:12,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113745562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:12,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:12,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:12,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454709392] [2021-11-23 16:47:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:12,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:12,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:12,989 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:16,057 INFO L93 Difference]: Finished difference Result 3072 states and 5735 transitions. [2021-11-23 16:48:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 16:48:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:16,093 INFO L225 Difference]: With dead ends: 3072 [2021-11-23 16:48:16,094 INFO L226 Difference]: Without dead ends: 1895 [2021-11-23 16:48:16,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 16:48:16,109 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 876 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:16,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 790 Invalid, 3498 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [406 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 62.8s Time] [2021-11-23 16:48:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-23 16:48:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1838. [2021-11-23 16:48:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.6614044637996734) internal successors, (3052), 1837 states have internal predecessors, (3052), 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 16:48:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3052 transitions. [2021-11-23 16:48:16,335 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3052 transitions. Word has length 24 [2021-11-23 16:48:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:16,336 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3052 transitions. [2021-11-23 16:48:16,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3052 transitions. [2021-11-23 16:48:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 16:48:16,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:16,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:16,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:16,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:16,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 382506931, now seen corresponding path program 1 times [2021-11-23 16:48:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:16,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335576395] [2021-11-23 16:48:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:16,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:16,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:16,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:48:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:17,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:17,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335576395] [2021-11-23 16:48:17,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335576395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:17,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:17,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:48:17,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826778853] [2021-11-23 16:48:17,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:17,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:17,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:17,119 INFO L87 Difference]: Start difference. First operand 1838 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 16:49:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:29,883 INFO L93 Difference]: Finished difference Result 5269 states and 8800 transitions. [2021-11-23 16:49:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 90 [2021-11-23 16:49:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:29,921 INFO L225 Difference]: With dead ends: 5269 [2021-11-23 16:49:29,921 INFO L226 Difference]: Without dead ends: 3433 [2021-11-23 16:49:29,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 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 16:49:29,927 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 783 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:29,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1216 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 72.6s Time] [2021-11-23 16:49:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2021-11-23 16:49:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 3426. [2021-11-23 16:49:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 1.423941605839416) internal successors, (4877), 3425 states have internal predecessors, (4877), 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 16:49:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4877 transitions. [2021-11-23 16:49:30,044 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4877 transitions. Word has length 90 [2021-11-23 16:49:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:30,045 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4877 transitions. [2021-11-23 16:49:30,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 16:49:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4877 transitions. [2021-11-23 16:49:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 16:49:30,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:30,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:30,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:30,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1919705338, now seen corresponding path program 1 times [2021-11-23 16:49:30,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:30,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082545860] [2021-11-23 16:49:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:30,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:30,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:30,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:30,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:49:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:30,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:30,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082545860] [2021-11-23 16:49:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082545860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:30,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:30,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:49:30,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401997668] [2021-11-23 16:49:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:30,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:30,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:30,848 INFO L87 Difference]: Start difference. First operand 3426 states and 4877 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 16:50:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:48,779 INFO L93 Difference]: Finished difference Result 7673 states and 11096 transitions. [2021-11-23 16:50:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 97 [2021-11-23 16:50:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:48,825 INFO L225 Difference]: With dead ends: 7673 [2021-11-23 16:50:48,825 INFO L226 Difference]: Without dead ends: 4249 [2021-11-23 16:50:48,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 16:50:48,833 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 783 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:48,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1268 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 77.7s Time] [2021-11-23 16:50:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-11-23 16:50:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4234. [2021-11-23 16:50:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 1.2889203874320814) internal successors, (5456), 4233 states have internal predecessors, (5456), 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 16:50:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 5456 transitions. [2021-11-23 16:50:48,980 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 5456 transitions. Word has length 97 [2021-11-23 16:50:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:48,981 INFO L470 AbstractCegarLoop]: Abstraction has 4234 states and 5456 transitions. [2021-11-23 16:50:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 16:50:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 5456 transitions. [2021-11-23 16:50:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:50:48,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:48,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:49,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:49,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:49,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -435530978, now seen corresponding path program 1 times [2021-11-23 16:50:49,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:49,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604712374] [2021-11-23 16:50:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:49,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:49,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:50:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:49,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:50,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:50,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604712374] [2021-11-23 16:50:50,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604712374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:50,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:50,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:50:50,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754652023] [2021-11-23 16:50:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:50,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:50,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:50,578 INFO L87 Difference]: Start difference. First operand 4234 states and 5456 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 16:51:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:47,301 INFO L93 Difference]: Finished difference Result 7679 states and 10103 transitions. [2021-11-23 16:51:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 113 [2021-11-23 16:51:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:47,341 INFO L225 Difference]: With dead ends: 7679 [2021-11-23 16:51:47,342 INFO L226 Difference]: Without dead ends: 4234 [2021-11-23 16:51:47,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 16:51:47,349 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:47,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 56.6s Time] [2021-11-23 16:51:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2021-11-23 16:51:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4234. [2021-11-23 16:51:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 1.287739192062367) internal successors, (5451), 4233 states have internal predecessors, (5451), 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 16:51:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 5451 transitions. [2021-11-23 16:51:47,541 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 5451 transitions. Word has length 113 [2021-11-23 16:51:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:47,541 INFO L470 AbstractCegarLoop]: Abstraction has 4234 states and 5451 transitions. [2021-11-23 16:51:47,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 16:51:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 5451 transitions. [2021-11-23 16:51:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 16:51:47,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:47,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:47,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:47,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:47,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 491774067, now seen corresponding path program 1 times [2021-11-23 16:51:47,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:47,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779829814] [2021-11-23 16:51:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:47,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:47,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:47,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:51:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:51:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:49,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779829814] [2021-11-23 16:51:49,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779829814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1058293094] [2021-11-23 16:51:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:49,359 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:49,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:49,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:49,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 16:51:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:49,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:49,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1058293094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:49,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:51:49,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 16:51:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536704320] [2021-11-23 16:51:49,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:49,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:49,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:51:49,817 INFO L87 Difference]: Start difference. First operand 4234 states and 5451 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 16:52:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:52,574 INFO L93 Difference]: Finished difference Result 10075 states and 13542 transitions. [2021-11-23 16:52:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2021-11-23 16:52:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:52,624 INFO L225 Difference]: With dead ends: 10075 [2021-11-23 16:52:52,624 INFO L226 Difference]: Without dead ends: 6630 [2021-11-23 16:52:52,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:52:52,632 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 1096 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:52,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 935 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 62.6s Time] [2021-11-23 16:52:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-11-23 16:52:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 6629. [2021-11-23 16:52:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6628 states have (on average 1.2711225105612554) internal successors, (8425), 6628 states have internal predecessors, (8425), 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 16:52:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8425 transitions. [2021-11-23 16:52:52,812 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8425 transitions. Word has length 120 [2021-11-23 16:52:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:52,814 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 8425 transitions. [2021-11-23 16:52:52,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 16:52:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8425 transitions. [2021-11-23 16:52:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 16:52:52,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:52,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:52,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 16:52:53,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 16:52:53,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:53,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 323657576, now seen corresponding path program 1 times [2021-11-23 16:52:53,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:53,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839230091] [2021-11-23 16:52:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:53,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:53,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:52:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:52:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 65 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:59,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 65 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:25,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839230091] [2021-11-23 16:53:25,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839230091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [586275696] [2021-11-23 16:53:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:25,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:25,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:25,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 16:53:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:26,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 16:53:27,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:27,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [586275696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:27,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:53:27,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 16:53:27,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431363050] [2021-11-23 16:53:27,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:27,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:27,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:53:27,191 INFO L87 Difference]: Start difference. First operand 6629 states and 8425 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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 16:54:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:54,428 INFO L93 Difference]: Finished difference Result 14234 states and 19057 transitions. [2021-11-23 16:54:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:54:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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 221 [2021-11-23 16:54:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:54,500 INFO L225 Difference]: With dead ends: 14234 [2021-11-23 16:54:54,500 INFO L226 Difference]: Without dead ends: 10769 [2021-11-23 16:54:54,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:54,507 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 1962 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:54,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1962 Valid, 326 Invalid, 4167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1282 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 87.0s Time] [2021-11-23 16:54:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2021-11-23 16:54:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 8997. [2021-11-23 16:54:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8997 states, 8996 states have (on average 1.303690529124055) internal successors, (11728), 8996 states have internal predecessors, (11728), 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 16:54:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8997 states to 8997 states and 11728 transitions. [2021-11-23 16:54:54,741 INFO L78 Accepts]: Start accepts. Automaton has 8997 states and 11728 transitions. Word has length 221 [2021-11-23 16:54:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:54,742 INFO L470 AbstractCegarLoop]: Abstraction has 8997 states and 11728 transitions. [2021-11-23 16:54:54,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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 16:54:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8997 states and 11728 transitions. [2021-11-23 16:54:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 16:54:54,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:54,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:54,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:54,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:55,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:55,166 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1840123782, now seen corresponding path program 1 times [2021-11-23 16:54:55,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:55,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369258865] [2021-11-23 16:54:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:55,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:55,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:55,172 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:55,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:54:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:55,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:55,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369258865] [2021-11-23 16:54:55,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369258865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:55,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:55,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:55,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082467162] [2021-11-23 16:54:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:55,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:55,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:55,847 INFO L87 Difference]: Start difference. First operand 8997 states and 11728 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 16:56:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:08,400 INFO L93 Difference]: Finished difference Result 21172 states and 28644 transitions. [2021-11-23 16:56:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 223 [2021-11-23 16:56:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:08,443 INFO L225 Difference]: With dead ends: 21172 [2021-11-23 16:56:08,443 INFO L226 Difference]: Without dead ends: 12964 [2021-11-23 16:56:08,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 221 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 16:56:08,456 INFO L933 BasicCegarLoop]: 1905 mSDtfsCounter, 764 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:08,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 2049 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 72.3s Time] [2021-11-23 16:56:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12964 states. [2021-11-23 16:56:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12964 to 12156. [2021-11-23 16:56:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 1.258000822706705) internal successors, (15291), 12155 states have internal predecessors, (15291), 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 16:56:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 15291 transitions. [2021-11-23 16:56:08,704 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 15291 transitions. Word has length 223 [2021-11-23 16:56:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:08,705 INFO L470 AbstractCegarLoop]: Abstraction has 12156 states and 15291 transitions. [2021-11-23 16:56:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 16:56:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 15291 transitions. [2021-11-23 16:56:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 16:56:08,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:08,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:08,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:08,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:08,929 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash -340979635, now seen corresponding path program 1 times [2021-11-23 16:56:08,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:08,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150617664] [2021-11-23 16:56:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:08,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:08,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:08,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:08,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:56:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:56:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:13,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:37,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:37,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150617664] [2021-11-23 16:56:37,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150617664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:37,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815582979] [2021-11-23 16:56:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:37,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:37,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 16:56:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:38,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815582979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:38,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:56:38,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 16:56:38,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946910081] [2021-11-23 16:56:38,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:38,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:38,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:38,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:56:38,051 INFO L87 Difference]: Start difference. First operand 12156 states and 15291 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 16:57:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:29,352 INFO L93 Difference]: Finished difference Result 23512 states and 29773 transitions. [2021-11-23 16:57:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:57:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 263 [2021-11-23 16:57:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:29,396 INFO L225 Difference]: With dead ends: 23512 [2021-11-23 16:57:29,397 INFO L226 Difference]: Without dead ends: 12145 [2021-11-23 16:57:29,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 781 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:57:29,409 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 1018 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:29,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1646 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 51.1s Time] [2021-11-23 16:57:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12145 states. [2021-11-23 16:57:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12145 to 12143. [2021-11-23 16:57:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12143 states, 12142 states have (on average 1.1538461538461537) internal successors, (14010), 12142 states have internal predecessors, (14010), 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 16:57:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12143 states to 12143 states and 14010 transitions. [2021-11-23 16:57:29,612 INFO L78 Accepts]: Start accepts. Automaton has 12143 states and 14010 transitions. Word has length 263 [2021-11-23 16:57:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:29,613 INFO L470 AbstractCegarLoop]: Abstraction has 12143 states and 14010 transitions. [2021-11-23 16:57:29,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 16:57:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12143 states and 14010 transitions. [2021-11-23 16:57:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-23 16:57:29,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:29,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:29,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:29,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 16:57:30,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:30,024 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:30,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:30,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2040975792, now seen corresponding path program 1 times [2021-11-23 16:57:30,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042693577] [2021-11-23 16:57:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:30,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:30,028 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:30,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:57:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:30,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:57:30,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 43 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 43 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:52,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042693577] [2021-11-23 16:57:52,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042693577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2054313583] [2021-11-23 16:57:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:52,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:52,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:52,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:57:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:57:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 145 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:55,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 145 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2054313583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:58,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876677399] [2021-11-23 16:57:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:58,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:58,829 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:58,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a37843e-6fa9-47ca-a7ee-dc177bff0a9c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 16:57:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:57:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:02,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:05,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876677399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:05,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 12 [2021-11-23 16:58:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046817744] [2021-11-23 16:58:05,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:05,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 16:58:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 16:58:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:58:05,293 INFO L87 Difference]: Start difference. First operand 12143 states and 14010 transitions. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 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 16:58:47,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:58:54,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []