./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label08.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_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/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_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/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_d0d27098-a36e-404f-838e-d5e44be60583/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 cfb40cb555a14fd95bceea51ff65e6513c4cf2d7cc92f4af25db414fd945afd5 --- 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 07:16:07,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:16:07,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:16:07,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:16:07,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:16:07,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:16:07,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:16:07,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:16:07,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:16:07,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:16:07,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:16:07,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:16:07,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:16:07,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:16:07,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:16:07,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:16:07,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:16:07,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:16:07,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:16:07,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:16:07,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:16:07,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:16:07,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:16:07,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:16:07,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:16:07,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:16:07,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:16:07,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:16:07,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:16:07,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:16:07,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:16:07,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:16:07,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:16:07,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:16:07,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:16:07,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:16:07,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:16:07,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:16:07,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:16:07,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:16:07,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:16:07,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:16:07,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:16:07,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:16:07,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:16:07,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:16:07,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:16:07,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:16:07,411 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:16:07,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:16:07,411 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:16:07,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:16:07,412 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:16:07,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:16:07,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:16:07,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:16:07,413 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:16:07,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:16:07,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:16:07,414 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:16:07,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:16:07,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:16:07,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:16:07,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:16:07,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:16:07,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:16:07,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:16:07,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:16:07,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:16:07,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:16:07,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:16:07,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:16:07,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:16:07,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:16:07,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:07,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:16:07,419 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:16:07,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:16:07,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:16:07,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:16:07,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:16:07,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:16:07,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:16:07,421 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_d0d27098-a36e-404f-838e-d5e44be60583/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfb40cb555a14fd95bceea51ff65e6513c4cf2d7cc92f4af25db414fd945afd5 [2022-11-19 07:16:07,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:16:07,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:16:07,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:16:07,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:16:07,705 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:16:07,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/eca-rers2012/Problem03_label08.c [2022-11-19 07:16:07,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/data/e6bbffa2e/dc6c021877ff48818f9ad9ba9995229b/FLAGf4a5d1647 [2022-11-19 07:16:08,395 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:16:08,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/sv-benchmarks/c/eca-rers2012/Problem03_label08.c [2022-11-19 07:16:08,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/data/e6bbffa2e/dc6c021877ff48818f9ad9ba9995229b/FLAGf4a5d1647 [2022-11-19 07:16:08,582 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/data/e6bbffa2e/dc6c021877ff48818f9ad9ba9995229b [2022-11-19 07:16:08,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:16:08,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:16:08,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:08,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:16:08,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:16:08,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:08" (1/1) ... [2022-11-19 07:16:08,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2edaa0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:08, skipping insertion in model container [2022-11-19 07:16:08,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:08" (1/1) ... [2022-11-19 07:16:08,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:16:08,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:16:09,285 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_d0d27098-a36e-404f-838e-d5e44be60583/sv-benchmarks/c/eca-rers2012/Problem03_label08.c[55410,55423] [2022-11-19 07:16:09,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:09,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:16:09,674 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_d0d27098-a36e-404f-838e-d5e44be60583/sv-benchmarks/c/eca-rers2012/Problem03_label08.c[55410,55423] [2022-11-19 07:16:09,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:09,709 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:16:09,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09 WrapperNode [2022-11-19 07:16:09,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:09,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:09,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:16:09,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:16:09,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,833 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-19 07:16:09,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:09,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:16:09,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:16:09,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:16:09,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:16:09,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:16:09,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:16:09,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:16:09,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (1/1) ... [2022-11-19 07:16:09,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:10,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:16:10,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:16:10,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:16:10,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:16:10,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:16:10,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:16:10,176 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:16:10,178 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:16:12,177 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:16:12,523 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:16:12,523 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:16:12,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:16:12 BoogieIcfgContainer [2022-11-19 07:16:12,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:16:12,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:16:12,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:16:12,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:16:12,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:16:08" (1/3) ... [2022-11-19 07:16:12,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee57c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:16:12, skipping insertion in model container [2022-11-19 07:16:12,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:09" (2/3) ... [2022-11-19 07:16:12,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee57c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:16:12, skipping insertion in model container [2022-11-19 07:16:12,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:16:12" (3/3) ... [2022-11-19 07:16:12,536 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2022-11-19 07:16:12,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:16:12,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:16:12,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:16:12,653 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;@1c479028, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:16:12,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:16:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:16:12,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:12,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:12,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash 209340343, now seen corresponding path program 1 times [2022-11-19 07:16:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:12,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185847872] [2022-11-19 07:16:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:13,759 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 07:16:13,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185847872] [2022-11-19 07:16:13,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185847872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:13,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:13,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510799151] [2022-11-19 07:16:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:13,810 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:14,911 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-19 07:16:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-19 07:16:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:14,925 INFO L225 Difference]: With dead ends: 440 [2022-11-19 07:16:14,926 INFO L226 Difference]: Without dead ends: 289 [2022-11-19 07:16:14,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:14,932 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:14,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:16:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-19 07:16:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-19 07:16:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5868055555555556) internal successors, (457), 288 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 457 transitions. [2022-11-19 07:16:14,982 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 457 transitions. Word has length 143 [2022-11-19 07:16:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:14,983 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 457 transitions. [2022-11-19 07:16:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 457 transitions. [2022-11-19 07:16:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 07:16:14,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:14,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:16:14,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1094380630, now seen corresponding path program 1 times [2022-11-19 07:16:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:14,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812030995] [2022-11-19 07:16:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:15,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:15,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812030995] [2022-11-19 07:16:15,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812030995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:15,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:15,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603440416] [2022-11-19 07:16:15,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:15,245 INFO L87 Difference]: Start difference. First operand 289 states and 457 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:16,138 INFO L93 Difference]: Finished difference Result 863 states and 1368 transitions. [2022-11-19 07:16:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-19 07:16:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:16,143 INFO L225 Difference]: With dead ends: 863 [2022-11-19 07:16:16,144 INFO L226 Difference]: Without dead ends: 575 [2022-11-19 07:16:16,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:16,146 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:16,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:16:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-19 07:16:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-19 07:16:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5452961672473868) internal successors, (887), 574 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 887 transitions. [2022-11-19 07:16:16,175 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 887 transitions. Word has length 151 [2022-11-19 07:16:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:16,175 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 887 transitions. [2022-11-19 07:16:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 887 transitions. [2022-11-19 07:16:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 07:16:16,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:16,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:16,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:16:16,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash -316857893, now seen corresponding path program 1 times [2022-11-19 07:16:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:16,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907061629] [2022-11-19 07:16:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:16,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:16,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907061629] [2022-11-19 07:16:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907061629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:16,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:16,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485803985] [2022-11-19 07:16:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:16,509 INFO L87 Difference]: Start difference. First operand 575 states and 887 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:17,321 INFO L93 Difference]: Finished difference Result 1435 states and 2321 transitions. [2022-11-19 07:16:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-19 07:16:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:17,328 INFO L225 Difference]: With dead ends: 1435 [2022-11-19 07:16:17,328 INFO L226 Difference]: Without dead ends: 861 [2022-11-19 07:16:17,330 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 07:16:17,331 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:17,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 205 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:16:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-19 07:16:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-19 07:16:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.563953488372093) internal successors, (1345), 860 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1345 transitions. [2022-11-19 07:16:17,376 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1345 transitions. Word has length 158 [2022-11-19 07:16:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:17,377 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1345 transitions. [2022-11-19 07:16:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1345 transitions. [2022-11-19 07:16:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 07:16:17,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:17,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:17,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:16:17,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1352605963, now seen corresponding path program 1 times [2022-11-19 07:16:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:17,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629142050] [2022-11-19 07:16:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:17,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629142050] [2022-11-19 07:16:17,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629142050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:17,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:17,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:17,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399537145] [2022-11-19 07:16:17,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:16:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:16:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:17,809 INFO L87 Difference]: Start difference. First operand 861 states and 1345 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:18,823 INFO L93 Difference]: Finished difference Result 2579 states and 4032 transitions. [2022-11-19 07:16:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:16:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-11-19 07:16:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:18,830 INFO L225 Difference]: With dead ends: 2579 [2022-11-19 07:16:18,830 INFO L226 Difference]: Without dead ends: 1719 [2022-11-19 07:16:18,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:18,833 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 467 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:18,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 11 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:16:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-19 07:16:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-19 07:16:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.438882421420256) internal successors, (2472), 1718 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2472 transitions. [2022-11-19 07:16:18,876 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2472 transitions. Word has length 168 [2022-11-19 07:16:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:18,876 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2472 transitions. [2022-11-19 07:16:18,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2472 transitions. [2022-11-19 07:16:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-19 07:16:18,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:18,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:18,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:16:18,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash 629675218, now seen corresponding path program 1 times [2022-11-19 07:16:18,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422817621] [2022-11-19 07:16:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:19,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:19,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422817621] [2022-11-19 07:16:19,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422817621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:19,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:19,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422472881] [2022-11-19 07:16:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:19,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:19,394 INFO L87 Difference]: Start difference. First operand 1719 states and 2472 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:20,189 INFO L93 Difference]: Finished difference Result 3723 states and 5374 transitions. [2022-11-19 07:16:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-11-19 07:16:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:20,196 INFO L225 Difference]: With dead ends: 3723 [2022-11-19 07:16:20,197 INFO L226 Difference]: Without dead ends: 2005 [2022-11-19 07:16:20,199 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 07:16:20,200 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:20,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 222 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-11-19 07:16:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 2005. [2022-11-19 07:16:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.4201596806387227) internal successors, (2846), 2004 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2846 transitions. [2022-11-19 07:16:20,255 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2846 transitions. Word has length 192 [2022-11-19 07:16:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:20,256 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 2846 transitions. [2022-11-19 07:16:20,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2846 transitions. [2022-11-19 07:16:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-19 07:16:20,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:20,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:16:20,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1350110218, now seen corresponding path program 1 times [2022-11-19 07:16:20,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:20,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779517946] [2022-11-19 07:16:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:20,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:16:20,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:20,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779517946] [2022-11-19 07:16:20,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779517946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:20,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:20,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463838027] [2022-11-19 07:16:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:20,564 INFO L87 Difference]: Start difference. First operand 2005 states and 2846 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:21,391 INFO L93 Difference]: Finished difference Result 5439 states and 7888 transitions. [2022-11-19 07:16:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2022-11-19 07:16:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:21,404 INFO L225 Difference]: With dead ends: 5439 [2022-11-19 07:16:21,404 INFO L226 Difference]: Without dead ends: 3435 [2022-11-19 07:16:21,407 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 07:16:21,408 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 147 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:21,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 260 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:16:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-19 07:16:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-19 07:16:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.290331974373908) internal successors, (4431), 3434 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4431 transitions. [2022-11-19 07:16:21,536 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4431 transitions. Word has length 198 [2022-11-19 07:16:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:21,537 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4431 transitions. [2022-11-19 07:16:21,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4431 transitions. [2022-11-19 07:16:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-19 07:16:21,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:21,544 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:21,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:16:21,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -22372689, now seen corresponding path program 1 times [2022-11-19 07:16:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756886066] [2022-11-19 07:16:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:16:22,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:22,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756886066] [2022-11-19 07:16:22,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756886066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:22,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:22,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:22,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293534988] [2022-11-19 07:16:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:22,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:22,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:22,057 INFO L87 Difference]: Start difference. First operand 3435 states and 4431 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:22,973 INFO L93 Difference]: Finished difference Result 9445 states and 12225 transitions. [2022-11-19 07:16:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-19 07:16:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:22,993 INFO L225 Difference]: With dead ends: 9445 [2022-11-19 07:16:22,993 INFO L226 Difference]: Without dead ends: 6011 [2022-11-19 07:16:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:23,001 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:23,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 115 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:16:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2022-11-19 07:16:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 6009. [2022-11-19 07:16:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 1.2911118508655126) internal successors, (7757), 6008 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 7757 transitions. [2022-11-19 07:16:23,145 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 7757 transitions. Word has length 207 [2022-11-19 07:16:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:23,145 INFO L495 AbstractCegarLoop]: Abstraction has 6009 states and 7757 transitions. [2022-11-19 07:16:23,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 7757 transitions. [2022-11-19 07:16:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-19 07:16:23,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:23,154 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:23,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:16:23,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1544400617, now seen corresponding path program 1 times [2022-11-19 07:16:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:23,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696956841] [2022-11-19 07:16:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:23,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696956841] [2022-11-19 07:16:23,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696956841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:23,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:23,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:23,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205412336] [2022-11-19 07:16:23,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:23,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:16:23,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:16:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:23,641 INFO L87 Difference]: Start difference. First operand 6009 states and 7757 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:24,843 INFO L93 Difference]: Finished difference Result 12017 states and 15536 transitions. [2022-11-19 07:16:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:16:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-11-19 07:16:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:24,864 INFO L225 Difference]: With dead ends: 12017 [2022-11-19 07:16:24,867 INFO L226 Difference]: Without dead ends: 6295 [2022-11-19 07:16:24,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:24,874 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:24,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 36 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:16:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2022-11-19 07:16:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6009. [2022-11-19 07:16:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 1.2911118508655126) internal successors, (7757), 6008 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 7757 transitions. [2022-11-19 07:16:25,019 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 7757 transitions. Word has length 208 [2022-11-19 07:16:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:25,019 INFO L495 AbstractCegarLoop]: Abstraction has 6009 states and 7757 transitions. [2022-11-19 07:16:25,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 7757 transitions. [2022-11-19 07:16:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-19 07:16:25,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:25,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:25,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:16:25,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash 256294706, now seen corresponding path program 1 times [2022-11-19 07:16:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:25,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657903400] [2022-11-19 07:16:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:25,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:16:25,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:25,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657903400] [2022-11-19 07:16:25,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657903400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:25,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913049995] [2022-11-19 07:16:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:25,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:25,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:25,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:25,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:16:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:16:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:25,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:25,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913049995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:25,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:25,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:16:25,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857228503] [2022-11-19 07:16:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:25,983 INFO L87 Difference]: Start difference. First operand 6009 states and 7757 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:26,811 INFO L93 Difference]: Finished difference Result 14019 states and 18237 transitions. [2022-11-19 07:16:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-11-19 07:16:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:26,856 INFO L225 Difference]: With dead ends: 14019 [2022-11-19 07:16:26,856 INFO L226 Difference]: Without dead ends: 8297 [2022-11-19 07:16:26,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:26,866 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 132 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:26,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 222 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2022-11-19 07:16:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 8011. [2022-11-19 07:16:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 1.2876404494382023) internal successors, (10314), 8010 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 10314 transitions. [2022-11-19 07:16:27,101 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 10314 transitions. Word has length 215 [2022-11-19 07:16:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:27,101 INFO L495 AbstractCegarLoop]: Abstraction has 8011 states and 10314 transitions. [2022-11-19 07:16:27,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 10314 transitions. [2022-11-19 07:16:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-19 07:16:27,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:27,112 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:27,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:16:27,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:27,319 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2087246553, now seen corresponding path program 1 times [2022-11-19 07:16:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820279341] [2022-11-19 07:16:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:16:27,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820279341] [2022-11-19 07:16:27,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820279341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446847787] [2022-11-19 07:16:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:27,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:27,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:16:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:16:28,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:28,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446847787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:28,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:28,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:16:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520145898] [2022-11-19 07:16:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:28,387 INFO L87 Difference]: Start difference. First operand 8011 states and 10314 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:29,208 INFO L93 Difference]: Finished difference Result 16879 states and 21988 transitions. [2022-11-19 07:16:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-11-19 07:16:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:29,226 INFO L225 Difference]: With dead ends: 16879 [2022-11-19 07:16:29,226 INFO L226 Difference]: Without dead ends: 9155 [2022-11-19 07:16:29,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:29,235 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:29,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2022-11-19 07:16:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 9012. [2022-11-19 07:16:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9012 states, 9011 states have (on average 1.266008212185107) internal successors, (11408), 9011 states have internal predecessors, (11408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 11408 transitions. [2022-11-19 07:16:29,410 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 11408 transitions. Word has length 235 [2022-11-19 07:16:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:29,411 INFO L495 AbstractCegarLoop]: Abstraction has 9012 states and 11408 transitions. [2022-11-19 07:16:29,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 11408 transitions. [2022-11-19 07:16:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-19 07:16:29,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:29,424 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:29,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:16:29,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:16:29,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -441783715, now seen corresponding path program 1 times [2022-11-19 07:16:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88753111] [2022-11-19 07:16:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:30,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:30,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88753111] [2022-11-19 07:16:30,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88753111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:30,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:30,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:30,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756669315] [2022-11-19 07:16:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:30,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:30,157 INFO L87 Difference]: Start difference. First operand 9012 states and 11408 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:30,937 INFO L93 Difference]: Finished difference Result 18166 states and 22961 transitions. [2022-11-19 07:16:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-19 07:16:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:30,952 INFO L225 Difference]: With dead ends: 18166 [2022-11-19 07:16:30,952 INFO L226 Difference]: Without dead ends: 8869 [2022-11-19 07:16:30,960 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 07:16:30,960 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:30,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 236 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2022-11-19 07:16:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8154. [2022-11-19 07:16:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 1.1707346988838465) internal successors, (9545), 8153 states have internal predecessors, (9545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 9545 transitions. [2022-11-19 07:16:31,104 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 9545 transitions. Word has length 236 [2022-11-19 07:16:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:31,105 INFO L495 AbstractCegarLoop]: Abstraction has 8154 states and 9545 transitions. [2022-11-19 07:16:31,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 9545 transitions. [2022-11-19 07:16:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-19 07:16:31,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:31,117 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:31,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:16:31,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1282086497, now seen corresponding path program 1 times [2022-11-19 07:16:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312152123] [2022-11-19 07:16:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:16:31,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312152123] [2022-11-19 07:16:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312152123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:31,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:31,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530759848] [2022-11-19 07:16:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:31,690 INFO L87 Difference]: Start difference. First operand 8154 states and 9545 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:32,448 INFO L93 Difference]: Finished difference Result 19024 states and 22337 transitions. [2022-11-19 07:16:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-11-19 07:16:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:32,466 INFO L225 Difference]: With dead ends: 19024 [2022-11-19 07:16:32,467 INFO L226 Difference]: Without dead ends: 11157 [2022-11-19 07:16:32,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:32,474 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:32,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 54 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2022-11-19 07:16:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11014. [2022-11-19 07:16:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 1.1701625351856897) internal successors, (12887), 11013 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 12887 transitions. [2022-11-19 07:16:32,662 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 12887 transitions. Word has length 249 [2022-11-19 07:16:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 11014 states and 12887 transitions. [2022-11-19 07:16:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 12887 transitions. [2022-11-19 07:16:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-19 07:16:32,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:32,677 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:32,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:16:32,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -6307023, now seen corresponding path program 1 times [2022-11-19 07:16:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023555752] [2022-11-19 07:16:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:16:33,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023555752] [2022-11-19 07:16:33,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023555752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:33,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:33,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:33,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042077965] [2022-11-19 07:16:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:33,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:33,320 INFO L87 Difference]: Start difference. First operand 11014 states and 12887 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:34,080 INFO L93 Difference]: Finished difference Result 24744 states and 28998 transitions. [2022-11-19 07:16:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-11-19 07:16:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:34,108 INFO L225 Difference]: With dead ends: 24744 [2022-11-19 07:16:34,108 INFO L226 Difference]: Without dead ends: 14017 [2022-11-19 07:16:34,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:34,119 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:34,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 71 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:16:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14017 states. [2022-11-19 07:16:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14017 to 13874. [2022-11-19 07:16:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13874 states, 13873 states have (on average 1.167375477546313) internal successors, (16195), 13873 states have internal predecessors, (16195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13874 states to 13874 states and 16195 transitions. [2022-11-19 07:16:34,390 INFO L78 Accepts]: Start accepts. Automaton has 13874 states and 16195 transitions. Word has length 255 [2022-11-19 07:16:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:34,390 INFO L495 AbstractCegarLoop]: Abstraction has 13874 states and 16195 transitions. [2022-11-19 07:16:34,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 13874 states and 16195 transitions. [2022-11-19 07:16:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-19 07:16:34,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:34,407 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:16:34,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2075699126, now seen corresponding path program 1 times [2022-11-19 07:16:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:34,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903824463] [2022-11-19 07:16:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:16:35,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903824463] [2022-11-19 07:16:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903824463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313672020] [2022-11-19 07:16:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:35,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:35,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:35,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:35,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:16:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 07:16:35,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:35,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313672020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:35,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:35,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-19 07:16:35,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486513591] [2022-11-19 07:16:35,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:35,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:35,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:35,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:35,693 INFO L87 Difference]: Start difference. First operand 13874 states and 16195 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:36,530 INFO L93 Difference]: Finished difference Result 31179 states and 36787 transitions. [2022-11-19 07:16:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2022-11-19 07:16:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:36,561 INFO L225 Difference]: With dead ends: 31179 [2022-11-19 07:16:36,561 INFO L226 Difference]: Without dead ends: 17592 [2022-11-19 07:16:36,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:36,572 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:36,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 61 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17592 states. [2022-11-19 07:16:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17592 to 17163. [2022-11-19 07:16:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17163 states, 17162 states have (on average 1.13524064794313) internal successors, (19483), 17162 states have internal predecessors, (19483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17163 states to 17163 states and 19483 transitions. [2022-11-19 07:16:36,848 INFO L78 Accepts]: Start accepts. Automaton has 17163 states and 19483 transitions. Word has length 262 [2022-11-19 07:16:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:36,848 INFO L495 AbstractCegarLoop]: Abstraction has 17163 states and 19483 transitions. [2022-11-19 07:16:36,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17163 states and 19483 transitions. [2022-11-19 07:16:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-19 07:16:36,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:36,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:16:36,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:16:37,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1908392293, now seen corresponding path program 1 times [2022-11-19 07:16:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:37,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837506626] [2022-11-19 07:16:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:37,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837506626] [2022-11-19 07:16:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837506626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:37,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:37,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393791012] [2022-11-19 07:16:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:37,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:37,623 INFO L87 Difference]: Start difference. First operand 17163 states and 19483 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:38,458 INFO L93 Difference]: Finished difference Result 34325 states and 39172 transitions. [2022-11-19 07:16:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-11-19 07:16:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:38,493 INFO L225 Difference]: With dead ends: 34325 [2022-11-19 07:16:38,493 INFO L226 Difference]: Without dead ends: 17735 [2022-11-19 07:16:38,504 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 07:16:38,505 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:38,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 173 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17735 states. [2022-11-19 07:16:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17735 to 17592. [2022-11-19 07:16:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17592 states, 17591 states have (on average 1.1435393098743676) internal successors, (20116), 17591 states have internal predecessors, (20116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17592 states to 17592 states and 20116 transitions. [2022-11-19 07:16:38,789 INFO L78 Accepts]: Start accepts. Automaton has 17592 states and 20116 transitions. Word has length 271 [2022-11-19 07:16:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:38,789 INFO L495 AbstractCegarLoop]: Abstraction has 17592 states and 20116 transitions. [2022-11-19 07:16:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17592 states and 20116 transitions. [2022-11-19 07:16:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-19 07:16:38,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:38,806 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:16:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:16:38,806 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1853994794, now seen corresponding path program 1 times [2022-11-19 07:16:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:38,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940339728] [2022-11-19 07:16:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:38,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:16:39,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:39,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940339728] [2022-11-19 07:16:39,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940339728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:39,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:39,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255086727] [2022-11-19 07:16:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:39,323 INFO L87 Difference]: Start difference. First operand 17592 states and 20116 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:40,006 INFO L93 Difference]: Finished difference Result 35326 states and 40375 transitions. [2022-11-19 07:16:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2022-11-19 07:16:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:40,033 INFO L225 Difference]: With dead ends: 35326 [2022-11-19 07:16:40,033 INFO L226 Difference]: Without dead ends: 18164 [2022-11-19 07:16:40,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:40,043 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:40,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 72 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:16:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18164 states. [2022-11-19 07:16:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18164 to 18164. [2022-11-19 07:16:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18164 states, 18163 states have (on average 1.1406155370808788) internal successors, (20717), 18163 states have internal predecessors, (20717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18164 states to 18164 states and 20717 transitions. [2022-11-19 07:16:40,328 INFO L78 Accepts]: Start accepts. Automaton has 18164 states and 20717 transitions. Word has length 283 [2022-11-19 07:16:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:40,328 INFO L495 AbstractCegarLoop]: Abstraction has 18164 states and 20717 transitions. [2022-11-19 07:16:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18164 states and 20717 transitions. [2022-11-19 07:16:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-19 07:16:40,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:40,345 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:40,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:16:40,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1619385925, now seen corresponding path program 1 times [2022-11-19 07:16:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:40,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047184263] [2022-11-19 07:16:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:40,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:16:41,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047184263] [2022-11-19 07:16:41,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047184263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:41,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459776244] [2022-11-19 07:16:41,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:41,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:41,034 INFO L87 Difference]: Start difference. First operand 18164 states and 20717 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:41,663 INFO L93 Difference]: Finished difference Result 35326 states and 40360 transitions. [2022-11-19 07:16:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-11-19 07:16:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:41,687 INFO L225 Difference]: With dead ends: 35326 [2022-11-19 07:16:41,688 INFO L226 Difference]: Without dead ends: 18164 [2022-11-19 07:16:41,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:41,699 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:41,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:16:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18164 states. [2022-11-19 07:16:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18164 to 18164. [2022-11-19 07:16:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18164 states, 18163 states have (on average 1.1404503661289433) internal successors, (20714), 18163 states have internal predecessors, (20714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18164 states to 18164 states and 20714 transitions. [2022-11-19 07:16:42,080 INFO L78 Accepts]: Start accepts. Automaton has 18164 states and 20714 transitions. Word has length 295 [2022-11-19 07:16:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:42,080 INFO L495 AbstractCegarLoop]: Abstraction has 18164 states and 20714 transitions. [2022-11-19 07:16:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18164 states and 20714 transitions. [2022-11-19 07:16:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-19 07:16:42,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:42,101 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:42,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:16:42,101 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1434590808, now seen corresponding path program 1 times [2022-11-19 07:16:42,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:42,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994263780] [2022-11-19 07:16:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:16:42,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994263780] [2022-11-19 07:16:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994263780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:42,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:42,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:42,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822938587] [2022-11-19 07:16:42,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:42,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:42,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:42,647 INFO L87 Difference]: Start difference. First operand 18164 states and 20714 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:43,435 INFO L93 Difference]: Finished difference Result 40762 states and 46654 transitions. [2022-11-19 07:16:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2022-11-19 07:16:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:43,471 INFO L225 Difference]: With dead ends: 40762 [2022-11-19 07:16:43,471 INFO L226 Difference]: Without dead ends: 23600 [2022-11-19 07:16:43,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:16:43,485 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:43,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:16:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23600 states. [2022-11-19 07:16:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23600 to 21024. [2022-11-19 07:16:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21024 states, 21023 states have (on average 1.1462208057841412) internal successors, (24097), 21023 states have internal predecessors, (24097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 24097 transitions. [2022-11-19 07:16:44,056 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 24097 transitions. Word has length 296 [2022-11-19 07:16:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:44,057 INFO L495 AbstractCegarLoop]: Abstraction has 21024 states and 24097 transitions. [2022-11-19 07:16:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 24097 transitions. [2022-11-19 07:16:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-19 07:16:44,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:44,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:16:44,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:16:44,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1787559534, now seen corresponding path program 1 times [2022-11-19 07:16:44,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:44,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243144589] [2022-11-19 07:16:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:44,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:44,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243144589] [2022-11-19 07:16:44,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243144589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231993855] [2022-11-19 07:16:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:44,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:44,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:16:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:16:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:16:45,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231993855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934944229] [2022-11-19 07:16:45,665 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-19 07:16:45,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:45,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:16:45,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:16:45,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:22:54,404 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2022-11-19 07:22:54,516 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16992 conjuctions. This might take some time... [2022-11-19 07:22:56,102 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 608 conjuctions. [2022-11-19 07:22:56,134 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2022-11-19 07:22:56,220 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16992 conjuctions. This might take some time... [2022-11-19 07:22:57,849 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 608 conjuctions. [2022-11-19 07:22:58,833 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2022-11-19 07:22:58,926 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16992 conjuctions. This might take some time... [2022-11-19 07:23:00,459 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 608 conjuctions. [2022-11-19 07:23:37,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:24:03,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [934944229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:03,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:03,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-19 07:24:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078197614] [2022-11-19 07:24:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:03,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:24:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:24:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:24:03,645 INFO L87 Difference]: Start difference. First operand 21024 states and 24097 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:10,981 INFO L93 Difference]: Finished difference Result 41345 states and 47501 transitions. [2022-11-19 07:24:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:24:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-11-19 07:24:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:11,006 INFO L225 Difference]: With dead ends: 41345 [2022-11-19 07:24:11,006 INFO L226 Difference]: Without dead ends: 21466 [2022-11-19 07:24:11,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 633 SyntacticMatches, 273 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:24:11,020 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:11,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 69 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 07:24:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21466 states. [2022-11-19 07:24:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21466 to 21285. [2022-11-19 07:24:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21285 states, 21284 states have (on average 1.1465889870325128) internal successors, (24404), 21284 states have internal predecessors, (24404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 24404 transitions. [2022-11-19 07:24:11,374 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 24404 transitions. Word has length 305 [2022-11-19 07:24:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:11,375 INFO L495 AbstractCegarLoop]: Abstraction has 21285 states and 24404 transitions. [2022-11-19 07:24:11,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 24404 transitions. [2022-11-19 07:24:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-19 07:24:11,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:11,392 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:11,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:11,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:11,599 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash -85647653, now seen corresponding path program 1 times [2022-11-19 07:24:11,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:11,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834142403] [2022-11-19 07:24:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-19 07:24:12,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834142403] [2022-11-19 07:24:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834142403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:12,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439557974] [2022-11-19 07:24:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:12,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:12,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:12,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:12,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:24:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:12,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:24:12,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:12,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439557974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:12,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:12,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:24:12,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548375169] [2022-11-19 07:24:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:12,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:12,536 INFO L87 Difference]: Start difference. First operand 21285 states and 24404 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:13,276 INFO L93 Difference]: Finished difference Result 43025 states and 49442 transitions. [2022-11-19 07:24:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2022-11-19 07:24:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:13,294 INFO L225 Difference]: With dead ends: 43025 [2022-11-19 07:24:13,294 INFO L226 Difference]: Without dead ends: 23003 [2022-11-19 07:24:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:13,305 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 86 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:13,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 50 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23003 states. [2022-11-19 07:24:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23003 to 22715. [2022-11-19 07:24:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22715 states, 22714 states have (on average 1.1296557189398608) internal successors, (25659), 22714 states have internal predecessors, (25659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22715 states to 22715 states and 25659 transitions. [2022-11-19 07:24:13,666 INFO L78 Accepts]: Start accepts. Automaton has 22715 states and 25659 transitions. Word has length 313 [2022-11-19 07:24:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:13,667 INFO L495 AbstractCegarLoop]: Abstraction has 22715 states and 25659 transitions. [2022-11-19 07:24:13,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22715 states and 25659 transitions. [2022-11-19 07:24:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-19 07:24:13,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:13,688 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:13,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:13,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:13,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash 658717838, now seen corresponding path program 1 times [2022-11-19 07:24:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:13,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723852099] [2022-11-19 07:24:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:14,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723852099] [2022-11-19 07:24:14,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723852099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:14,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:14,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012881696] [2022-11-19 07:24:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:24:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:24:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:24:14,353 INFO L87 Difference]: Start difference. First operand 22715 states and 25659 transitions. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:15,399 INFO L93 Difference]: Finished difference Result 45454 states and 51376 transitions. [2022-11-19 07:24:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:24:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2022-11-19 07:24:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:15,420 INFO L225 Difference]: With dead ends: 45454 [2022-11-19 07:24:15,420 INFO L226 Difference]: Without dead ends: 23859 [2022-11-19 07:24:15,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:24:15,433 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 125 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:15,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 53 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:24:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23859 states. [2022-11-19 07:24:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23859 to 23001. [2022-11-19 07:24:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23001 states, 23000 states have (on average 1.1293478260869565) internal successors, (25975), 23000 states have internal predecessors, (25975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23001 states to 23001 states and 25975 transitions. [2022-11-19 07:24:15,686 INFO L78 Accepts]: Start accepts. Automaton has 23001 states and 25975 transitions. Word has length 317 [2022-11-19 07:24:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:15,687 INFO L495 AbstractCegarLoop]: Abstraction has 23001 states and 25975 transitions. [2022-11-19 07:24:15,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 23001 states and 25975 transitions. [2022-11-19 07:24:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-19 07:24:15,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:15,707 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 07:24:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:24:15,707 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1079487395, now seen corresponding path program 1 times [2022-11-19 07:24:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962528616] [2022-11-19 07:24:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:24:17,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962528616] [2022-11-19 07:24:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962528616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256924103] [2022-11-19 07:24:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:17,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:17,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:17,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:24:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 07:24:17,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:17,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256924103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:17,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:17,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-19 07:24:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841753896] [2022-11-19 07:24:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:17,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:17,512 INFO L87 Difference]: Start difference. First operand 23001 states and 25975 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:18,243 INFO L93 Difference]: Finished difference Result 46312 states and 52717 transitions. [2022-11-19 07:24:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2022-11-19 07:24:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:18,266 INFO L225 Difference]: With dead ends: 46312 [2022-11-19 07:24:18,266 INFO L226 Difference]: Without dead ends: 24717 [2022-11-19 07:24:18,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:18,276 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:18,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24717 states. [2022-11-19 07:24:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24717 to 24143. [2022-11-19 07:24:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24143 states, 24142 states have (on average 1.1376439400215392) internal successors, (27465), 24142 states have internal predecessors, (27465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24143 states to 24143 states and 27465 transitions. [2022-11-19 07:24:18,534 INFO L78 Accepts]: Start accepts. Automaton has 24143 states and 27465 transitions. Word has length 331 [2022-11-19 07:24:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:18,534 INFO L495 AbstractCegarLoop]: Abstraction has 24143 states and 27465 transitions. [2022-11-19 07:24:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 24143 states and 27465 transitions. [2022-11-19 07:24:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-19 07:24:18,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:18,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:24:18,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:18,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:24:18,758 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash 131600867, now seen corresponding path program 1 times [2022-11-19 07:24:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148509292] [2022-11-19 07:24:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:19,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148509292] [2022-11-19 07:24:19,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148509292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707825175] [2022-11-19 07:24:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:19,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:24:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:24:19,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707825175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:19,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:19,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-19 07:24:19,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814245062] [2022-11-19 07:24:19,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:19,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:19,743 INFO L87 Difference]: Start difference. First operand 24143 states and 27465 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:20,515 INFO L93 Difference]: Finished difference Result 49423 states and 56245 transitions. [2022-11-19 07:24:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-11-19 07:24:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:20,538 INFO L225 Difference]: With dead ends: 49423 [2022-11-19 07:24:20,538 INFO L226 Difference]: Without dead ends: 26002 [2022-11-19 07:24:20,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:24:20,547 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:20,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 213 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:24:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2022-11-19 07:24:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 24286. [2022-11-19 07:24:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24286 states, 24285 states have (on average 1.1367510809141446) internal successors, (27606), 24285 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24286 states to 24286 states and 27606 transitions. [2022-11-19 07:24:20,954 INFO L78 Accepts]: Start accepts. Automaton has 24286 states and 27606 transitions. Word has length 332 [2022-11-19 07:24:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:20,954 INFO L495 AbstractCegarLoop]: Abstraction has 24286 states and 27606 transitions. [2022-11-19 07:24:20,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 24286 states and 27606 transitions. [2022-11-19 07:24:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-11-19 07:24:20,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:20,967 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:20,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:21,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:21,168 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1303626149, now seen corresponding path program 1 times [2022-11-19 07:24:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:21,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621941321] [2022-11-19 07:24:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:21,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-19 07:24:21,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621941321] [2022-11-19 07:24:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621941321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472645029] [2022-11-19 07:24:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:21,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:21,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d27098-a36e-404f-838e-d5e44be60583/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:24:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:24:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 205 proven. 71 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:24:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 205 proven. 71 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:24:22,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472645029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:22,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303318094] [2022-11-19 07:24:22,480 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-19 07:24:22,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:22,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:22,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:22,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs