./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS --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 42e706fd1a5bd201d46dd2f3322f156b6d900789b8c9ace16cba5458f69fdc62 --- 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-8393723 [2022-11-19 07:34:00,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:00,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:00,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:00,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:00,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:00,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:00,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:00,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:00,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:00,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:00,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:00,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:00,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:00,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:00,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:00,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:00,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:00,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:00,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:00,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:00,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:00,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:00,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:00,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:00,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:00,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:00,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:00,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:00,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:00,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:00,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:00,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:00,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:00,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:00,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:00,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:00,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:00,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:00,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:00,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:00,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:34:00,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:00,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:00,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:00,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:00,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:00,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:00,446 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:00,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:00,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:00,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:00,452 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:00,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:00,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:00,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:00,453 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:00,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:00,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:00,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:00,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:00,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:00,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:00,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:00,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:00,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:34:00,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:00,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:34:00,458 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:00,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:34:00,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:00,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:34:00,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:00,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:00,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:00,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:00,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:00,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:00,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:34:00,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:00,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:00,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:34:00,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:00,462 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_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42e706fd1a5bd201d46dd2f3322f156b6d900789b8c9ace16cba5458f69fdc62 [2022-11-19 07:34:00,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:00,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:00,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:00,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:00,796 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:00,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c [2022-11-19 07:34:00,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/data/0f42b9ff6/da13946ddabb46629d8a85c113ebc350/FLAGe854f60f1 [2022-11-19 07:34:01,355 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:01,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/sv-benchmarks/c/systemc/token_ring.08.cil-1.c [2022-11-19 07:34:01,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/data/0f42b9ff6/da13946ddabb46629d8a85c113ebc350/FLAGe854f60f1 [2022-11-19 07:34:01,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/data/0f42b9ff6/da13946ddabb46629d8a85c113ebc350 [2022-11-19 07:34:01,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:01,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:01,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:01,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:01,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:01,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:01" (1/1) ... [2022-11-19 07:34:01,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d36b499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:01, skipping insertion in model container [2022-11-19 07:34:01,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:01" (1/1) ... [2022-11-19 07:34:01,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:01,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:01,936 WARN L234 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_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/sv-benchmarks/c/systemc/token_ring.08.cil-1.c[671,684] [2022-11-19 07:34:02,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:02,069 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:02,094 WARN L234 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_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/sv-benchmarks/c/systemc/token_ring.08.cil-1.c[671,684] [2022-11-19 07:34:02,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:02,161 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:02,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02 WrapperNode [2022-11-19 07:34:02,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:02,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:02,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:02,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:02,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,232 INFO L138 Inliner]: procedures = 44, calls = 55, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 621 [2022-11-19 07:34:02,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:02,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:02,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:02,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:02,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:02,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:02,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:02,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:02,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (1/1) ... [2022-11-19 07:34:02,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:02,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:34:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:34:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:34:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:34:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:34:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:34:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:34:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:34:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:34:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:34:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:34:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:34:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:34:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:02,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:02,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:34:03,273 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:34:03,661 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:34:03,662 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 07:34:03,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:03 BoogieIcfgContainer [2022-11-19 07:34:03,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:34:03,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:34:03,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:34:03,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:34:03,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:01" (1/3) ... [2022-11-19 07:34:03,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d6121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:03, skipping insertion in model container [2022-11-19 07:34:03,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:02" (2/3) ... [2022-11-19 07:34:03,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d6121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:03, skipping insertion in model container [2022-11-19 07:34:03,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:03" (3/3) ... [2022-11-19 07:34:03,675 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-1.c [2022-11-19 07:34:03,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:34:03,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:34:03,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:34:03,812 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;@5d512c77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:34:03,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:34:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 114 states have (on average 1.543859649122807) internal successors, (176), 116 states have internal predecessors, (176), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:34:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:34:03,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:03,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:03,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -496660782, now seen corresponding path program 1 times [2022-11-19 07:34:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159835344] [2022-11-19 07:34:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:03,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:04,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:04,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159835344] [2022-11-19 07:34:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159835344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:04,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:04,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:04,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955705395] [2022-11-19 07:34:04,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:04,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:04,363 INFO L87 Difference]: Start difference. First operand has 144 states, 114 states have (on average 1.543859649122807) internal successors, (176), 116 states have internal predecessors, (176), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-11-19 07:34:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:04,851 INFO L93 Difference]: Finished difference Result 416 states and 648 transitions. [2022-11-19 07:34:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 54 [2022-11-19 07:34:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:04,872 INFO L225 Difference]: With dead ends: 416 [2022-11-19 07:34:04,872 INFO L226 Difference]: Without dead ends: 273 [2022-11-19 07:34:04,882 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 [2022-11-19 07:34:04,888 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 380 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:04,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 586 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-19 07:34:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-11-19 07:34:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 219 states have (on average 1.4977168949771689) internal successors, (328), 221 states have internal predecessors, (328), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 07:34:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 408 transitions. [2022-11-19 07:34:04,978 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 408 transitions. Word has length 54 [2022-11-19 07:34:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:04,978 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 408 transitions. [2022-11-19 07:34:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-11-19 07:34:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 408 transitions. [2022-11-19 07:34:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:04,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:04,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:04,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:34:04,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash -748429062, now seen corresponding path program 1 times [2022-11-19 07:34:04,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:04,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238092135] [2022-11-19 07:34:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:34:05,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238092135] [2022-11-19 07:34:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238092135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140835980] [2022-11-19 07:34:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:05,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:05,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:34:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:34:05,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:05,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140835980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:05,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:05,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:05,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923221472] [2022-11-19 07:34:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:05,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:05,641 INFO L87 Difference]: Start difference. First operand 272 states and 408 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:05,815 INFO L93 Difference]: Finished difference Result 799 states and 1219 transitions. [2022-11-19 07:34:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-19 07:34:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:05,820 INFO L225 Difference]: With dead ends: 799 [2022-11-19 07:34:05,821 INFO L226 Difference]: Without dead ends: 532 [2022-11-19 07:34:05,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:05,823 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 190 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:05,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 386 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-19 07:34:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 528. [2022-11-19 07:34:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 429 states have (on average 1.494172494172494) internal successors, (641), 432 states have internal predecessors, (641), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:34:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 789 transitions. [2022-11-19 07:34:05,895 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 789 transitions. Word has length 107 [2022-11-19 07:34:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:05,896 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 789 transitions. [2022-11-19 07:34:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 789 transitions. [2022-11-19 07:34:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:05,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:05,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:05,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:34:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:34:06,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1077686106, now seen corresponding path program 1 times [2022-11-19 07:34:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772602423] [2022-11-19 07:34:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:34:06,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772602423] [2022-11-19 07:34:06,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772602423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849191956] [2022-11-19 07:34:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:06,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:06,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:34:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:06,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:34:06,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849191956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:06,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158829698] [2022-11-19 07:34:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:06,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:06,590 INFO L87 Difference]: Start difference. First operand 528 states and 789 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:06,752 INFO L93 Difference]: Finished difference Result 1561 states and 2372 transitions. [2022-11-19 07:34:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-19 07:34:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:06,759 INFO L225 Difference]: With dead ends: 1561 [2022-11-19 07:34:06,760 INFO L226 Difference]: Without dead ends: 1038 [2022-11-19 07:34:06,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:06,763 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 187 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:06,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 385 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-19 07:34:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1032. [2022-11-19 07:34:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 843 states have (on average 1.4887307236061684) internal successors, (1255), 848 states have internal predecessors, (1255), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-19 07:34:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1535 transitions. [2022-11-19 07:34:06,855 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1535 transitions. Word has length 107 [2022-11-19 07:34:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:06,857 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1535 transitions. [2022-11-19 07:34:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1535 transitions. [2022-11-19 07:34:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:06,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:06,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:06,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:07,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:07,074 INFO L85 PathProgramCache]: Analyzing trace with hash -116556550, now seen corresponding path program 1 times [2022-11-19 07:34:07,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:07,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002231727] [2022-11-19 07:34:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:34:07,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002231727] [2022-11-19 07:34:07,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002231727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124588616] [2022-11-19 07:34:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:07,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:07,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:34:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:34:07,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:07,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124588616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:07,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:07,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508028] [2022-11-19 07:34:07,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:07,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:07,520 INFO L87 Difference]: Start difference. First operand 1032 states and 1535 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:07,753 INFO L93 Difference]: Finished difference Result 3061 states and 4628 transitions. [2022-11-19 07:34:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-19 07:34:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:07,772 INFO L225 Difference]: With dead ends: 3061 [2022-11-19 07:34:07,772 INFO L226 Difference]: Without dead ends: 2034 [2022-11-19 07:34:07,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:07,780 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 181 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:07,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 358 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2022-11-19 07:34:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2024. [2022-11-19 07:34:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1659 states have (on average 1.4822182037371912) internal successors, (2459), 1668 states have internal predecessors, (2459), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-19 07:34:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2995 transitions. [2022-11-19 07:34:07,948 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2995 transitions. Word has length 107 [2022-11-19 07:34:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:07,952 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2995 transitions. [2022-11-19 07:34:07,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2995 transitions. [2022-11-19 07:34:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:07,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:07,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:07,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:08,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -976125286, now seen corresponding path program 1 times [2022-11-19 07:34:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:08,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987909404] [2022-11-19 07:34:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:08,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:34:08,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987909404] [2022-11-19 07:34:08,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987909404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548444565] [2022-11-19 07:34:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:08,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:08,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:08,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:34:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:34:08,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:08,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548444565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:08,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:08,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-19 07:34:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896077692] [2022-11-19 07:34:08,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:08,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:08,566 INFO L87 Difference]: Start difference. First operand 2024 states and 2995 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:08,850 INFO L93 Difference]: Finished difference Result 6013 states and 9040 transitions. [2022-11-19 07:34:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-19 07:34:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:08,872 INFO L225 Difference]: With dead ends: 6013 [2022-11-19 07:34:08,872 INFO L226 Difference]: Without dead ends: 3994 [2022-11-19 07:34:08,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:08,881 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 175 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:08,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 358 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2022-11-19 07:34:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3976. [2022-11-19 07:34:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3267 states have (on average 1.475053565962657) internal successors, (4819), 3284 states have internal predecessors, (4819), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-19 07:34:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 5851 transitions. [2022-11-19 07:34:09,139 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 5851 transitions. Word has length 107 [2022-11-19 07:34:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:09,140 INFO L495 AbstractCegarLoop]: Abstraction has 3976 states and 5851 transitions. [2022-11-19 07:34:09,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 5851 transitions. [2022-11-19 07:34:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:09,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:09,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:09,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:09,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:09,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1626488890, now seen corresponding path program 1 times [2022-11-19 07:34:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188839070] [2022-11-19 07:34:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:34:09,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:09,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188839070] [2022-11-19 07:34:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188839070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:09,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:09,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225293632] [2022-11-19 07:34:09,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:09,461 INFO L87 Difference]: Start difference. First operand 3976 states and 5851 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-19 07:34:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:09,777 INFO L93 Difference]: Finished difference Result 7050 states and 10556 transitions. [2022-11-19 07:34:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 107 [2022-11-19 07:34:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:09,804 INFO L225 Difference]: With dead ends: 7050 [2022-11-19 07:34:09,805 INFO L226 Difference]: Without dead ends: 5032 [2022-11-19 07:34:09,812 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 [2022-11-19 07:34:09,813 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 92 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:09,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 455 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2022-11-19 07:34:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 4696. [2022-11-19 07:34:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 3955 states have (on average 1.517825537294564) internal successors, (6003), 3972 states have internal predecessors, (6003), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-19 07:34:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 7067 transitions. [2022-11-19 07:34:10,153 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 7067 transitions. Word has length 107 [2022-11-19 07:34:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:10,156 INFO L495 AbstractCegarLoop]: Abstraction has 4696 states and 7067 transitions. [2022-11-19 07:34:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-19 07:34:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 7067 transitions. [2022-11-19 07:34:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:34:10,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:10,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:34:10,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash 592991792, now seen corresponding path program 1 times [2022-11-19 07:34:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:10,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237916864] [2022-11-19 07:34:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:34:10,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:10,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237916864] [2022-11-19 07:34:10,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237916864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:10,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:10,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954880658] [2022-11-19 07:34:10,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:10,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:10,301 INFO L87 Difference]: Start difference. First operand 4696 states and 7067 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:10,777 INFO L93 Difference]: Finished difference Result 13933 states and 21216 transitions. [2022-11-19 07:34:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 145 [2022-11-19 07:34:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:10,828 INFO L225 Difference]: With dead ends: 13933 [2022-11-19 07:34:10,829 INFO L226 Difference]: Without dead ends: 9242 [2022-11-19 07:34:10,843 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 [2022-11-19 07:34:10,845 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 177 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:10,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-11-19 07:34:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 9192. [2022-11-19 07:34:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 7747 states have (on average 1.5080676390860979) internal successors, (11683), 7780 states have internal predecessors, (11683), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-19 07:34:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 13739 transitions. [2022-11-19 07:34:11,410 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 13739 transitions. Word has length 145 [2022-11-19 07:34:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:11,411 INFO L495 AbstractCegarLoop]: Abstraction has 9192 states and 13739 transitions. [2022-11-19 07:34:11,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 13739 transitions. [2022-11-19 07:34:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:34:11,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:11,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:34:11,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1524113622, now seen corresponding path program 1 times [2022-11-19 07:34:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:11,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920449672] [2022-11-19 07:34:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:34:11,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:11,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920449672] [2022-11-19 07:34:11,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920449672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:11,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:11,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211978584] [2022-11-19 07:34:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:11,596 INFO L87 Difference]: Start difference. First operand 9192 states and 13739 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:12,619 INFO L93 Difference]: Finished difference Result 27277 states and 41232 transitions. [2022-11-19 07:34:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 145 [2022-11-19 07:34:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:12,719 INFO L225 Difference]: With dead ends: 27277 [2022-11-19 07:34:12,719 INFO L226 Difference]: Without dead ends: 18090 [2022-11-19 07:34:12,752 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 [2022-11-19 07:34:12,753 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 179 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:12,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:34:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18090 states. [2022-11-19 07:34:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18090 to 17992. [2022-11-19 07:34:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17992 states, 15171 states have (on average 1.4977918396941534) internal successors, (22723), 15236 states have internal predecessors, (22723), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-19 07:34:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17992 states to 17992 states and 26699 transitions. [2022-11-19 07:34:13,820 INFO L78 Accepts]: Start accepts. Automaton has 17992 states and 26699 transitions. Word has length 145 [2022-11-19 07:34:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:13,821 INFO L495 AbstractCegarLoop]: Abstraction has 17992 states and 26699 transitions. [2022-11-19 07:34:13,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 17992 states and 26699 transitions. [2022-11-19 07:34:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:34:13,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:13,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:13,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:34:13,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1652512359, now seen corresponding path program 1 times [2022-11-19 07:34:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:13,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755405309] [2022-11-19 07:34:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:34:14,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755405309] [2022-11-19 07:34:14,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755405309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:14,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:14,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:14,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53591139] [2022-11-19 07:34:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:14,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:14,147 INFO L87 Difference]: Start difference. First operand 17992 states and 26699 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:15,920 INFO L93 Difference]: Finished difference Result 53389 states and 80080 transitions. [2022-11-19 07:34:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 145 [2022-11-19 07:34:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:16,073 INFO L225 Difference]: With dead ends: 53389 [2022-11-19 07:34:16,074 INFO L226 Difference]: Without dead ends: 35402 [2022-11-19 07:34:16,129 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 [2022-11-19 07:34:16,129 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 181 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:16,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35402 states. [2022-11-19 07:34:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35402 to 35208. [2022-11-19 07:34:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35208 states, 29699 states have (on average 1.4870197649752517) internal successors, (44163), 29828 states have internal predecessors, (44163), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-19 07:34:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35208 states to 35208 states and 51851 transitions. [2022-11-19 07:34:18,443 INFO L78 Accepts]: Start accepts. Automaton has 35208 states and 51851 transitions. Word has length 145 [2022-11-19 07:34:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 35208 states and 51851 transitions. [2022-11-19 07:34:18,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 35208 states and 51851 transitions. [2022-11-19 07:34:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:34:18,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:18,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:34:18,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash -202576367, now seen corresponding path program 1 times [2022-11-19 07:34:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096258891] [2022-11-19 07:34:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:18,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:34:18,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096258891] [2022-11-19 07:34:18,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096258891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:18,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147253541] [2022-11-19 07:34:18,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:18,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:18,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:18,671 INFO L87 Difference]: Start difference. First operand 35208 states and 51851 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:21,925 INFO L93 Difference]: Finished difference Result 104461 states and 155408 transitions. [2022-11-19 07:34:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 145 [2022-11-19 07:34:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:22,291 INFO L225 Difference]: With dead ends: 104461 [2022-11-19 07:34:22,291 INFO L226 Difference]: Without dead ends: 69258 [2022-11-19 07:34:22,430 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 [2022-11-19 07:34:22,431 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:22,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 373 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69258 states. [2022-11-19 07:34:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69258 to 68872. [2022-11-19 07:34:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68872 states, 58115 states have (on average 1.4757463649660156) internal successors, (85763), 58372 states have internal predecessors, (85763), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-19 07:34:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68872 states to 68872 states and 100619 transitions. [2022-11-19 07:34:26,379 INFO L78 Accepts]: Start accepts. Automaton has 68872 states and 100619 transitions. Word has length 145 [2022-11-19 07:34:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:26,379 INFO L495 AbstractCegarLoop]: Abstraction has 68872 states and 100619 transitions. [2022-11-19 07:34:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-19 07:34:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 68872 states and 100619 transitions. [2022-11-19 07:34:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 07:34:26,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:26,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:34:26,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash -759449740, now seen corresponding path program 1 times [2022-11-19 07:34:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032909207] [2022-11-19 07:34:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:34:27,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032909207] [2022-11-19 07:34:27,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032909207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80925151] [2022-11-19 07:34:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:27,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:27,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:34:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:34:27,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:27,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80925151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:27,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:27,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:34:27,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846372254] [2022-11-19 07:34:27,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:27,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:27,526 INFO L87 Difference]: Start difference. First operand 68872 states and 100619 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2022-11-19 07:34:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:31,183 INFO L93 Difference]: Finished difference Result 131980 states and 195085 transitions. [2022-11-19 07:34:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 166 [2022-11-19 07:34:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:31,851 INFO L225 Difference]: With dead ends: 131980 [2022-11-19 07:34:31,851 INFO L226 Difference]: Without dead ends: 96778 [2022-11-19 07:34:31,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:31,948 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 141 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:31,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 497 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96778 states. [2022-11-19 07:34:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96778 to 83720. [2022-11-19 07:34:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83720 states, 72195 states have (on average 1.5177089826165246) internal successors, (109571), 72452 states have internal predecessors, (109571), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-19 07:34:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83720 states to 83720 states and 125195 transitions. [2022-11-19 07:34:36,970 INFO L78 Accepts]: Start accepts. Automaton has 83720 states and 125195 transitions. Word has length 166 [2022-11-19 07:34:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:36,971 INFO L495 AbstractCegarLoop]: Abstraction has 83720 states and 125195 transitions. [2022-11-19 07:34:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2022-11-19 07:34:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 83720 states and 125195 transitions. [2022-11-19 07:34:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 07:34:37,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:37,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:37,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:37,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 961826060, now seen corresponding path program 2 times [2022-11-19 07:34:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:37,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294554678] [2022-11-19 07:34:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:34:37,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294554678] [2022-11-19 07:34:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294554678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390284950] [2022-11-19 07:34:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:34:37,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:37,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:37,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:34:37,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:34:37,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:34:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:34:38,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:38,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390284950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:38,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:38,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:34:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472729392] [2022-11-19 07:34:38,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:38,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:38,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:38,013 INFO L87 Difference]: Start difference. First operand 83720 states and 125195 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-19 07:34:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:41,738 INFO L93 Difference]: Finished difference Result 134028 states and 204045 transitions. [2022-11-19 07:34:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 166 [2022-11-19 07:34:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:42,022 INFO L225 Difference]: With dead ends: 134028 [2022-11-19 07:34:42,023 INFO L226 Difference]: Without dead ends: 83978 [2022-11-19 07:34:42,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:42,119 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 172 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:42,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 502 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83978 states. [2022-11-19 07:34:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83978 to 83464. [2022-11-19 07:34:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83464 states, 71939 states have (on average 1.5053170046845243) internal successors, (108291), 72196 states have internal predecessors, (108291), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-19 07:34:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83464 states to 83464 states and 123915 transitions. [2022-11-19 07:34:46,377 INFO L78 Accepts]: Start accepts. Automaton has 83464 states and 123915 transitions. Word has length 166 [2022-11-19 07:34:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:46,378 INFO L495 AbstractCegarLoop]: Abstraction has 83464 states and 123915 transitions. [2022-11-19 07:34:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-19 07:34:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 83464 states and 123915 transitions. [2022-11-19 07:34:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 07:34:46,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:46,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:46,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:34:46,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1478466830, now seen corresponding path program 1 times [2022-11-19 07:34:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497373693] [2022-11-19 07:34:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:34:47,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:47,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497373693] [2022-11-19 07:34:47,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497373693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:47,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981905709] [2022-11-19 07:34:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:47,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:47,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:47,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e858fc92-c0e9-4ad7-a505-6bd38ac95bea/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:34:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:47,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:34:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:34:47,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:47,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981905709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:47,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:47,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:34:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078379265] [2022-11-19 07:34:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:47,489 INFO L87 Difference]: Start difference. First operand 83464 states and 123915 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-11-19 07:34:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:50,797 INFO L93 Difference]: Finished difference Result 126412 states and 190221 transitions. [2022-11-19 07:34:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 166 [2022-11-19 07:34:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:51,055 INFO L225 Difference]: With dead ends: 126412 [2022-11-19 07:34:51,055 INFO L226 Difference]: Without dead ends: 83722 [2022-11-19 07:34:51,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:51,165 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 173 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:51,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 489 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83722 states.