./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8112998626056dc894e11aa34a9784719020235fe7efcff5e5ebeed0d86efe20 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:42:02,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:02,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:02,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:02,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:02,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:02,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:02,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:02,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:02,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:02,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:02,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:02,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:02,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:02,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:02,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:02,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:02,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:02,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:02,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:02,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:02,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:02,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:02,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:02,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:02,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:02,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:02,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:02,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:02,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:02,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:02,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:02,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:02,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:02,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:02,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:02,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:02,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:02,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:02,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:02,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:02,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:02,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:02,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:02,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:02,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:02,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:02,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:02,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:02,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:02,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:02,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:02,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:02,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:02,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:02,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:02,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:02,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:02,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:02,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:02,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:02,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:02,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:02,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:02,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:02,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:02,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:02,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:02,457 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:02,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:02,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:02,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:02,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:02,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:02,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:02,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:02,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:02,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:02,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:02,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:02,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:02,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:02,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:02,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8112998626056dc894e11aa34a9784719020235fe7efcff5e5ebeed0d86efe20 [2022-10-17 17:42:02,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:02,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:02,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:02,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:02,765 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:02,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c [2022-10-17 17:42:02,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/data/4bcd2d38d/1837b6c63e30449291a4275bd811c5d2/FLAGc0212f9de [2022-10-17 17:42:03,787 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:03,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c [2022-10-17 17:42:03,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/data/4bcd2d38d/1837b6c63e30449291a4275bd811c5d2/FLAGc0212f9de [2022-10-17 17:42:04,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/data/4bcd2d38d/1837b6c63e30449291a4275bd811c5d2 [2022-10-17 17:42:04,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:04,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:04,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:04,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:04,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:04,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:04" (1/1) ... [2022-10-17 17:42:04,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625ed10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:04, skipping insertion in model container [2022-10-17 17:42:04,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:04" (1/1) ... [2022-10-17 17:42:04,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:04,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:06,759 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_724b9bde-80fe-4fa4-907e-5d91e16360bb/sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c[380593,380606] [2022-10-17 17:42:06,790 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_724b9bde-80fe-4fa4-907e-5d91e16360bb/sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c[383339,383352] [2022-10-17 17:42:06,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:06,962 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:08,416 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_724b9bde-80fe-4fa4-907e-5d91e16360bb/sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c[380593,380606] [2022-10-17 17:42:08,422 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_724b9bde-80fe-4fa4-907e-5d91e16360bb/sv-benchmarks/c/combinations/Problem05_label49+token_ring.01.cil-1.c[383339,383352] [2022-10-17 17:42:08,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:08,523 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:08,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08 WrapperNode [2022-10-17 17:42:08,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:08,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:08,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:08,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:08,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:08,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,035 INFO L138 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2022-10-17 17:42:09,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:09,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:09,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:09,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:09,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,424 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:09,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:09,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:09,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:09,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (1/1) ... [2022-10-17 17:42:09,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:09,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:09,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:09,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:09,711 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:42:09,712 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:42:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:42:09,712 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:42:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:42:09,712 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:42:09,712 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:42:09,713 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:42:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:42:09,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:42:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:09,713 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:42:09,713 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:42:09,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:09,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:09,875 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:09,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:18,036 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:42:20,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:42:20,126 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:42:20,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:20 BoogieIcfgContainer [2022-10-17 17:42:20,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:42:20,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:42:20,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:42:20,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:42:20,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:04" (1/3) ... [2022-10-17 17:42:20,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63538a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:20, skipping insertion in model container [2022-10-17 17:42:20,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:08" (2/3) ... [2022-10-17 17:42:20,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63538a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:20, skipping insertion in model container [2022-10-17 17:42:20,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:20" (3/3) ... [2022-10-17 17:42:20,141 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.01.cil-1.c [2022-10-17 17:42:20,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:42:20,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:42:20,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:20,263 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c559c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:20,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:42:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 1710 states, 1686 states have (on average 1.9792408066429419) internal successors, (3337), 1689 states have internal predecessors, (3337), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:42:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:42:20,288 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:20,289 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:20,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1806713251, now seen corresponding path program 1 times [2022-10-17 17:42:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:20,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609242003] [2022-10-17 17:42:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:20,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:20,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609242003] [2022-10-17 17:42:20,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609242003] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:20,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:20,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70599295] [2022-10-17 17:42:20,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:20,705 INFO L87 Difference]: Start difference. First operand has 1710 states, 1686 states have (on average 1.9792408066429419) internal successors, (3337), 1689 states have internal predecessors, (3337), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:21,806 INFO L93 Difference]: Finished difference Result 3470 states and 6811 transitions. [2022-10-17 17:42:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-10-17 17:42:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:21,832 INFO L225 Difference]: With dead ends: 3470 [2022-10-17 17:42:21,833 INFO L226 Difference]: Without dead ends: 1759 [2022-10-17 17:42:21,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:21,845 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3416 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3416 SdHoareTripleChecker+Valid, 6308 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3416 Valid, 6308 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:42:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-10-17 17:42:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1758. [2022-10-17 17:42:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1718 states have (on average 1.960419091967404) internal successors, (3368), 1721 states have internal predecessors, (3368), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 17:42:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 3420 transitions. [2022-10-17 17:42:22,024 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 3420 transitions. Word has length 34 [2022-10-17 17:42:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:22,024 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 3420 transitions. [2022-10-17 17:42:22,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 3420 transitions. [2022-10-17 17:42:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 17:42:22,037 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:22,038 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:42:22,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:22,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash -994644743, now seen corresponding path program 1 times [2022-10-17 17:42:22,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:22,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212818654] [2022-10-17 17:42:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:22,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:22,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212818654] [2022-10-17 17:42:22,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212818654] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:22,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:22,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:42:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328364898] [2022-10-17 17:42:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:42:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:42:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:22,633 INFO L87 Difference]: Start difference. First operand 1758 states and 3420 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:42:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:23,473 INFO L93 Difference]: Finished difference Result 1980 states and 3707 transitions. [2022-10-17 17:42:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:42:23,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2022-10-17 17:42:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:23,493 INFO L225 Difference]: With dead ends: 1980 [2022-10-17 17:42:23,493 INFO L226 Difference]: Without dead ends: 1869 [2022-10-17 17:42:23,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:23,499 INFO L413 NwaCegarLoop]: 3145 mSDtfsCounter, 3419 mSDsluCounter, 6655 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 9359 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:23,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3428 Valid, 9359 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:42:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-10-17 17:42:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1855. [2022-10-17 17:42:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1783 states have (on average 1.9332585530005608) internal successors, (3447), 1787 states have internal predecessors, (3447), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-10-17 17:42:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 3539 transitions. [2022-10-17 17:42:23,612 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 3539 transitions. Word has length 59 [2022-10-17 17:42:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:23,613 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 3539 transitions. [2022-10-17 17:42:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:42:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 3539 transitions. [2022-10-17 17:42:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-17 17:42:23,620 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:23,620 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:42:23,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:42:23,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:23,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1445976286, now seen corresponding path program 1 times [2022-10-17 17:42:23,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157467400] [2022-10-17 17:42:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:23,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:23,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157467400] [2022-10-17 17:42:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157467400] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:23,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:23,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948648013] [2022-10-17 17:42:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:23,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:23,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:23,727 INFO L87 Difference]: Start difference. First operand 1855 states and 3539 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:42:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:24,251 INFO L93 Difference]: Finished difference Result 2015 states and 3741 transitions. [2022-10-17 17:42:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-10-17 17:42:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:24,268 INFO L225 Difference]: With dead ends: 2015 [2022-10-17 17:42:24,268 INFO L226 Difference]: Without dead ends: 1905 [2022-10-17 17:42:24,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:24,278 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 27 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6282 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:24,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6282 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-10-17 17:42:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1875. [2022-10-17 17:42:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1799 states have (on average 1.9282934963868816) internal successors, (3469), 1803 states have internal predecessors, (3469), 48 states have call successors, (48), 26 states have call predecessors, (48), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-10-17 17:42:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 3565 transitions. [2022-10-17 17:42:24,383 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 3565 transitions. Word has length 60 [2022-10-17 17:42:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:24,386 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 3565 transitions. [2022-10-17 17:42:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:42:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 3565 transitions. [2022-10-17 17:42:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 17:42:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:24,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-10-17 17:42:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:42:24,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1416922463, now seen corresponding path program 1 times [2022-10-17 17:42:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:24,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148236480] [2022-10-17 17:42:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:24,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:42:24,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148236480] [2022-10-17 17:42:24,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148236480] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:24,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:24,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040385707] [2022-10-17 17:42:24,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:24,481 INFO L87 Difference]: Start difference. First operand 1875 states and 3565 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:24,944 INFO L93 Difference]: Finished difference Result 2218 states and 4003 transitions. [2022-10-17 17:42:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 76 [2022-10-17 17:42:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:24,961 INFO L225 Difference]: With dead ends: 2218 [2022-10-17 17:42:24,961 INFO L226 Difference]: Without dead ends: 1989 [2022-10-17 17:42:24,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:24,971 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 3323 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:24,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 3218 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:42:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2022-10-17 17:42:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1984. [2022-10-17 17:42:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1874 states have (on average 1.8986125933831377) internal successors, (3558), 1879 states have internal predecessors, (3558), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-10-17 17:42:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3696 transitions. [2022-10-17 17:42:25,076 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3696 transitions. Word has length 76 [2022-10-17 17:42:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:25,077 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 3696 transitions. [2022-10-17 17:42:25,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3696 transitions. [2022-10-17 17:42:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:42:25,082 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:25,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:42:25,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1344057076, now seen corresponding path program 1 times [2022-10-17 17:42:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53279201] [2022-10-17 17:42:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:42:25,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53279201] [2022-10-17 17:42:25,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53279201] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224540959] [2022-10-17 17:42:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:25,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:25,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:42:25,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:25,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224540959] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:25,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:25,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:42:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479879832] [2022-10-17 17:42:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:25,440 INFO L87 Difference]: Start difference. First operand 1984 states and 3696 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:42:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:26,001 INFO L93 Difference]: Finished difference Result 2285 states and 4077 transitions. [2022-10-17 17:42:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2022-10-17 17:42:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:26,017 INFO L225 Difference]: With dead ends: 2285 [2022-10-17 17:42:26,017 INFO L226 Difference]: Without dead ends: 2057 [2022-10-17 17:42:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:26,022 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 35 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:26,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6284 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:42:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-10-17 17:42:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2010. [2022-10-17 17:42:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1894 states have (on average 1.892819429778247) internal successors, (3585), 1899 states have internal predecessors, (3585), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-10-17 17:42:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3729 transitions. [2022-10-17 17:42:26,134 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3729 transitions. Word has length 87 [2022-10-17 17:42:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:26,136 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 3729 transitions. [2022-10-17 17:42:26,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:42:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3729 transitions. [2022-10-17 17:42:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:42:26,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:26,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:26,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:26,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1131920220, now seen corresponding path program 2 times [2022-10-17 17:42:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466963110] [2022-10-17 17:42:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:42:26,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466963110] [2022-10-17 17:42:26,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466963110] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308697984] [2022-10-17 17:42:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:42:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:26,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:42:26,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:42:26,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:42:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 17:42:26,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:26,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308697984] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:26,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:26,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:42:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201389290] [2022-10-17 17:42:26,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:26,742 INFO L87 Difference]: Start difference. First operand 2010 states and 3729 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:27,280 INFO L93 Difference]: Finished difference Result 2268 states and 4070 transitions. [2022-10-17 17:42:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-10-17 17:42:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:27,295 INFO L225 Difference]: With dead ends: 2268 [2022-10-17 17:42:27,295 INFO L226 Difference]: Without dead ends: 2014 [2022-10-17 17:42:27,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:27,301 INFO L413 NwaCegarLoop]: 3157 mSDtfsCounter, 66 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6274 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:27,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6274 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-10-17 17:42:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2008. [2022-10-17 17:42:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1892 states have (on average 1.8884778012684988) internal successors, (3573), 1897 states have internal predecessors, (3573), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-10-17 17:42:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3717 transitions. [2022-10-17 17:42:27,402 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3717 transitions. Word has length 87 [2022-10-17 17:42:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:27,403 INFO L495 AbstractCegarLoop]: Abstraction has 2008 states and 3717 transitions. [2022-10-17 17:42:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3717 transitions. [2022-10-17 17:42:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:42:27,411 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:27,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:27,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:27,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:27,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1978392614, now seen corresponding path program 1 times [2022-10-17 17:42:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:27,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955874208] [2022-10-17 17:42:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:42:27,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955874208] [2022-10-17 17:42:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955874208] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61076067] [2022-10-17 17:42:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:27,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:42:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:42:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:42:28,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61076067] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:28,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:28,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:42:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208920325] [2022-10-17 17:42:28,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:28,019 INFO L87 Difference]: Start difference. First operand 2008 states and 3717 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:28,446 INFO L93 Difference]: Finished difference Result 2312 states and 4089 transitions. [2022-10-17 17:42:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2022-10-17 17:42:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:28,461 INFO L225 Difference]: With dead ends: 2312 [2022-10-17 17:42:28,461 INFO L226 Difference]: Without dead ends: 2069 [2022-10-17 17:42:28,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:28,464 INFO L413 NwaCegarLoop]: 3131 mSDtfsCounter, 3333 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:28,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 3145 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:42:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-10-17 17:42:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 2069. [2022-10-17 17:42:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1943 states have (on average 1.8667009778692742) internal successors, (3627), 1948 states have internal predecessors, (3627), 74 states have call successors, (74), 50 states have call predecessors, (74), 50 states have return successors, (74), 71 states have call predecessors, (74), 74 states have call successors, (74) [2022-10-17 17:42:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3775 transitions. [2022-10-17 17:42:28,567 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3775 transitions. Word has length 87 [2022-10-17 17:42:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:28,567 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3775 transitions. [2022-10-17 17:42:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3775 transitions. [2022-10-17 17:42:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:42:28,572 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:28,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:28,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:28,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:42:28,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1913338061, now seen corresponding path program 1 times [2022-10-17 17:42:28,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961574837] [2022-10-17 17:42:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:42:28,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961574837] [2022-10-17 17:42:28,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961574837] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072418929] [2022-10-17 17:42:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:28,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:28,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:28,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:42:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:29,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:42:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:42:29,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:29,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072418929] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:29,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:29,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:42:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219843915] [2022-10-17 17:42:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:29,122 INFO L87 Difference]: Start difference. First operand 2069 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:29,757 INFO L93 Difference]: Finished difference Result 2652 states and 4468 transitions. [2022-10-17 17:42:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:29,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2022-10-17 17:42:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:29,773 INFO L225 Difference]: With dead ends: 2652 [2022-10-17 17:42:29,773 INFO L226 Difference]: Without dead ends: 2230 [2022-10-17 17:42:29,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:29,780 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 31 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6262 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:29,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 6262 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:42:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2022-10-17 17:42:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2113. [2022-10-17 17:42:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 1975 states have (on average 1.8562025316455697) internal successors, (3666), 1981 states have internal predecessors, (3666), 80 states have call successors, (80), 56 states have call predecessors, (80), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2022-10-17 17:42:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 3826 transitions. [2022-10-17 17:42:29,874 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 3826 transitions. Word has length 88 [2022-10-17 17:42:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:29,875 INFO L495 AbstractCegarLoop]: Abstraction has 2113 states and 3826 transitions. [2022-10-17 17:42:29,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:42:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 3826 transitions. [2022-10-17 17:42:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 17:42:29,878 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:29,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:29,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:30,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_724b9bde-80fe-4fa4-907e-5d91e16360bb/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:30,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:30,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1021223140, now seen corresponding path program 1 times [2022-10-17 17:42:30,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:30,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621290989] [2022-10-17 17:42:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:30,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 17:42:30,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621290989] [2022-10-17 17:42:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621290989] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884271439] [2022-10-17 17:42:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:30,342 INFO L87 Difference]: Start difference. First operand 2113 states and 3826 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:31,021 INFO L93 Difference]: Finished difference Result 2846 states and 4708 transitions. [2022-10-17 17:42:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2022-10-17 17:42:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:31,042 INFO L225 Difference]: With dead ends: 2846 [2022-10-17 17:42:31,042 INFO L226 Difference]: Without dead ends: 2607 [2022-10-17 17:42:31,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:31,046 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 3395 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 6337 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:31,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3395 Valid, 6337 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:42:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-10-17 17:42:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2414. [2022-10-17 17:42:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2190 states have (on average 1.7945205479452055) internal successors, (3930), 2195 states have internal predecessors, (3930), 131 states have call successors, (131), 91 states have call predecessors, (131), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-10-17 17:42:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 4192 transitions. [2022-10-17 17:42:31,195 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 4192 transitions. Word has length 89 [2022-10-17 17:42:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:31,195 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 4192 transitions. [2022-10-17 17:42:31,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 4192 transitions. [2022-10-17 17:42:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-10-17 17:42:31,199 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:31,199 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:42:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:42:31,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash -588444528, now seen corresponding path program 1 times [2022-10-17 17:42:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:31,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786681318] [2022-10-17 17:42:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:31,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat