./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh --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 ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 --- 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-2329fc7 [2022-12-14 12:51:23,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:51:23,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:51:23,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:51:23,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:51:23,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:51:23,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:51:23,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:51:23,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:51:23,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:51:23,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:51:23,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:51:23,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:51:23,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:51:23,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:51:23,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:51:23,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:51:23,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:51:23,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:51:23,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:51:23,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:51:23,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:51:23,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:51:23,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:51:23,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:51:23,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:51:23,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:51:23,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:51:23,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:51:23,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:51:23,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:51:23,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:51:23,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:51:23,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:51:23,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:51:23,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:51:23,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:51:23,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:51:23,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:51:23,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:51:23,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:51:23,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:51:23,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:51:23,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:51:23,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:51:23,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:51:23,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:51:23,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:51:23,361 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:51:23,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:51:23,361 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:51:23,361 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:51:23,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:51:23,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:51:23,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:51:23,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:51:23,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:51:23,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:51:23,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:51:23,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:51:23,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:51:23,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:51:23,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:51:23,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:51:23,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:51:23,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:51:23,366 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_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 [2022-12-14 12:51:23,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:51:23,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:51:23,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:51:23,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:51:23,557 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:51:23,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2022-12-14 12:51:26,143 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:51:26,713 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:51:26,714 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2022-12-14 12:51:26,758 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/data/0f14e6126/5088739bcfbd4e24b5f6afd635dfdfea/FLAGdee31dfff [2022-12-14 12:51:26,769 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/data/0f14e6126/5088739bcfbd4e24b5f6afd635dfdfea [2022-12-14 12:51:26,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:51:26,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:51:26,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:51:26,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:51:26,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:51:26,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:51:26" (1/1) ... [2022-12-14 12:51:26,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509325fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:26, skipping insertion in model container [2022-12-14 12:51:26,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:51:26" (1/1) ... [2022-12-14 12:51:26,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:51:26,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:51:28,264 WARN L237 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_ed933483-0fda-4da1-9d3e-f39503414445/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2022-12-14 12:51:28,288 WARN L237 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_ed933483-0fda-4da1-9d3e-f39503414445/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2022-12-14 12:51:28,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:51:28,479 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:51:29,303 WARN L237 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_ed933483-0fda-4da1-9d3e-f39503414445/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2022-12-14 12:51:29,307 WARN L237 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_ed933483-0fda-4da1-9d3e-f39503414445/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2022-12-14 12:51:29,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:51:29,363 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:51:29,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29 WrapperNode [2022-12-14 12:51:29,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:51:29,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:51:29,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:51:29,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:51:29,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,649 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12914 [2022-12-14 12:51:29,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:51:29,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:51:29,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:51:29,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:51:29,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:51:29,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:51:29,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:51:29,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:51:29,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (1/1) ... [2022-12-14 12:51:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:51:29,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:29,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:51:29,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:51:29,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:51:29,984 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 12:51:29,984 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 12:51:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:51:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:51:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 12:51:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 12:51:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 12:51:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 12:51:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 12:51:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 12:51:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 12:51:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 12:51:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 12:51:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 12:51:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:51:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:51:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:51:30,100 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:51:30,102 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:51:35,687 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:51:37,035 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:51:37,035 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 12:51:37,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:51:37 BoogieIcfgContainer [2022-12-14 12:51:37,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:51:37,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:51:37,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:51:37,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:51:37,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:51:26" (1/3) ... [2022-12-14 12:51:37,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2810afa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:51:37, skipping insertion in model container [2022-12-14 12:51:37,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:51:29" (2/3) ... [2022-12-14 12:51:37,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2810afa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:51:37, skipping insertion in model container [2022-12-14 12:51:37,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:51:37" (3/3) ... [2022-12-14 12:51:37,047 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.07.cil-2.c [2022-12-14 12:51:37,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:51:37,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:51:37,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:51:37,140 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;@623f0483, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:51:37,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:51:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 12:51:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:51:37,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:37,158 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] [2022-12-14 12:51:37,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2084527391, now seen corresponding path program 1 times [2022-12-14 12:51:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588713225] [2022-12-14 12:51:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:51:37,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588713225] [2022-12-14 12:51:37,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588713225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:37,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:51:37,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:51:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445195747] [2022-12-14 12:51:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:37,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:51:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:51:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:51:37,560 INFO L87 Difference]: Start difference. First operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:51:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:38,290 INFO L93 Difference]: Finished difference Result 3679 states and 7167 transitions. [2022-12-14 12:51:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:51:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-12-14 12:51:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:38,307 INFO L225 Difference]: With dead ends: 3679 [2022-12-14 12:51:38,307 INFO L226 Difference]: Without dead ends: 1896 [2022-12-14 12:51:38,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:51:38,315 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 3622 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3622 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:38,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3622 Valid, 6656 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:51:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-12-14 12:51:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1895. [2022-12-14 12:51:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1841 states have (on average 1.9369907658881043) internal successors, (3566), 1845 states have internal predecessors, (3566), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 12:51:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3644 transitions. [2022-12-14 12:51:38,427 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3644 transitions. Word has length 53 [2022-12-14 12:51:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:38,428 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 3644 transitions. [2022-12-14 12:51:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:51:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3644 transitions. [2022-12-14 12:51:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:51:38,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:38,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:51:38,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1767948784, now seen corresponding path program 1 times [2022-12-14 12:51:38,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:38,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617365861] [2022-12-14 12:51:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:38,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617365861] [2022-12-14 12:51:38,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617365861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415219495] [2022-12-14 12:51:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:38,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:38,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:38,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:51:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:51:38,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:38,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415219495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:38,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:38,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145625996] [2022-12-14 12:51:38,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:38,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:38,838 INFO L87 Difference]: Start difference. First operand 1895 states and 3644 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:39,224 INFO L93 Difference]: Finished difference Result 2386 states and 4389 transitions. [2022-12-14 12:51:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:39,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 12:51:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:39,232 INFO L225 Difference]: With dead ends: 2386 [2022-12-14 12:51:39,232 INFO L226 Difference]: Without dead ends: 2137 [2022-12-14 12:51:39,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:39,235 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:39,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3429 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-12-14 12:51:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2131. [2022-12-14 12:51:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2033 states have (on average 1.8932611903590753) internal successors, (3849), 2038 states have internal predecessors, (3849), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 12:51:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3991 transitions. [2022-12-14 12:51:39,280 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3991 transitions. Word has length 102 [2022-12-14 12:51:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:39,281 INFO L495 AbstractCegarLoop]: Abstraction has 2131 states and 3991 transitions. [2022-12-14 12:51:39,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3991 transitions. [2022-12-14 12:51:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:51:39,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:39,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:39,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:39,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 977486094, now seen corresponding path program 1 times [2022-12-14 12:51:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948117132] [2022-12-14 12:51:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:39,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:39,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948117132] [2022-12-14 12:51:39,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948117132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:39,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273366181] [2022-12-14 12:51:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:39,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:39,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:39,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:39,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:51:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:51:39,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:39,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273366181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:39,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:39,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814086987] [2022-12-14 12:51:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:39,761 INFO L87 Difference]: Start difference. First operand 2131 states and 3991 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:40,155 INFO L93 Difference]: Finished difference Result 3088 states and 5438 transitions. [2022-12-14 12:51:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 12:51:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:40,164 INFO L225 Difference]: With dead ends: 3088 [2022-12-14 12:51:40,164 INFO L226 Difference]: Without dead ends: 2603 [2022-12-14 12:51:40,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:40,167 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3443 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-12-14 12:51:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2595. [2022-12-14 12:51:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2411 states have (on average 1.8262131895479055) internal successors, (4403), 2418 states have internal predecessors, (4403), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-12-14 12:51:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 4669 transitions. [2022-12-14 12:51:40,226 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 4669 transitions. Word has length 102 [2022-12-14 12:51:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:40,226 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 4669 transitions. [2022-12-14 12:51:40,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 4669 transitions. [2022-12-14 12:51:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:51:40,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:40,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:40,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:51:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 12:51:40,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash -607351412, now seen corresponding path program 1 times [2022-12-14 12:51:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:40,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054627324] [2022-12-14 12:51:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:40,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054627324] [2022-12-14 12:51:40,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054627324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379873043] [2022-12-14 12:51:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:40,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:40,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:40,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:51:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:51:40,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:40,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379873043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:40,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:40,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540218753] [2022-12-14 12:51:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:40,713 INFO L87 Difference]: Start difference. First operand 2595 states and 4669 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:41,078 INFO L93 Difference]: Finished difference Result 4468 states and 7486 transitions. [2022-12-14 12:51:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 12:51:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:41,094 INFO L225 Difference]: With dead ends: 4468 [2022-12-14 12:51:41,094 INFO L226 Difference]: Without dead ends: 3519 [2022-12-14 12:51:41,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:41,100 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3446 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:41,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2022-12-14 12:51:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3507. [2022-12-14 12:51:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3155 states have (on average 1.7391442155309034) internal successors, (5487), 3166 states have internal predecessors, (5487), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 12:51:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5993 transitions. [2022-12-14 12:51:41,231 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5993 transitions. Word has length 102 [2022-12-14 12:51:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 5993 transitions. [2022-12-14 12:51:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5993 transitions. [2022-12-14 12:51:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:51:41,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:41,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:41,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:51:41,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:41,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash 73992270, now seen corresponding path program 1 times [2022-12-14 12:51:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920008362] [2022-12-14 12:51:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:41,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920008362] [2022-12-14 12:51:41,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920008362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686802252] [2022-12-14 12:51:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:41,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:41,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:41,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:41,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:51:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:41,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:51:41,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686802252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:41,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:41,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772242288] [2022-12-14 12:51:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:41,763 INFO L87 Difference]: Start difference. First operand 3507 states and 5993 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:42,186 INFO L93 Difference]: Finished difference Result 7180 states and 11482 transitions. [2022-12-14 12:51:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-12-14 12:51:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:42,210 INFO L225 Difference]: With dead ends: 7180 [2022-12-14 12:51:42,210 INFO L226 Difference]: Without dead ends: 5319 [2022-12-14 12:51:42,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:42,218 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3431 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:42,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-12-14 12:51:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5299. [2022-12-14 12:51:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 4619 states have (on average 1.6468932669408962) internal successors, (7607), 4638 states have internal predecessors, (7607), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-12-14 12:51:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 8577 transitions. [2022-12-14 12:51:42,395 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 8577 transitions. Word has length 102 [2022-12-14 12:51:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:42,395 INFO L495 AbstractCegarLoop]: Abstraction has 5299 states and 8577 transitions. [2022-12-14 12:51:42,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:51:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 8577 transitions. [2022-12-14 12:51:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:51:42,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:42,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:42,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:42,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:42,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash 672309708, now seen corresponding path program 1 times [2022-12-14 12:51:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376047889] [2022-12-14 12:51:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:51:42,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:42,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376047889] [2022-12-14 12:51:42,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376047889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:42,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:51:42,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:51:42,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532282335] [2022-12-14 12:51:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:51:42,673 INFO L87 Difference]: Start difference. First operand 5299 states and 8577 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:51:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:43,134 INFO L93 Difference]: Finished difference Result 8151 states and 12868 transitions. [2022-12-14 12:51:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:43,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2022-12-14 12:51:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:43,158 INFO L225 Difference]: With dead ends: 8151 [2022-12-14 12:51:43,159 INFO L226 Difference]: Without dead ends: 6259 [2022-12-14 12:51:43,166 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 [2022-12-14 12:51:43,166 INFO L413 NwaCegarLoop]: 3307 mSDtfsCounter, 82 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:43,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6536 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2022-12-14 12:51:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 5939. [2022-12-14 12:51:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6542950066960016) internal successors, (8647), 5246 states have internal predecessors, (8647), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 12:51:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9649 transitions. [2022-12-14 12:51:43,403 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9649 transitions. Word has length 102 [2022-12-14 12:51:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:43,404 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 9649 transitions. [2022-12-14 12:51:43,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:51:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9649 transitions. [2022-12-14 12:51:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:51:43,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:43,416 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, 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] [2022-12-14 12:51:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:51:43,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1902000354, now seen corresponding path program 1 times [2022-12-14 12:51:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478448103] [2022-12-14 12:51:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 12:51:43,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478448103] [2022-12-14 12:51:43,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478448103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:43,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:51:43,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:51:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332146500] [2022-12-14 12:51:43,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:51:43,487 INFO L87 Difference]: Start difference. First operand 5939 states and 9649 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:44,096 INFO L93 Difference]: Finished difference Result 14380 states and 22394 transitions. [2022-12-14 12:51:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:44,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 12:51:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:44,121 INFO L225 Difference]: With dead ends: 14380 [2022-12-14 12:51:44,121 INFO L226 Difference]: Without dead ends: 10087 [2022-12-14 12:51:44,130 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 [2022-12-14 12:51:44,131 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3435 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:44,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2022-12-14 12:51:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 10035. [2022-12-14 12:51:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10035 states, 8651 states have (on average 1.5839787307825686) internal successors, (13703), 8686 states have internal predecessors, (13703), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 12:51:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 15633 transitions. [2022-12-14 12:51:44,378 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 15633 transitions. Word has length 137 [2022-12-14 12:51:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:44,378 INFO L495 AbstractCegarLoop]: Abstraction has 10035 states and 15633 transitions. [2022-12-14 12:51:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 15633 transitions. [2022-12-14 12:51:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:51:44,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:44,393 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, 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] [2022-12-14 12:51:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:51:44,393 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash -573281343, now seen corresponding path program 1 times [2022-12-14 12:51:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:44,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461589559] [2022-12-14 12:51:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 12:51:44,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:44,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461589559] [2022-12-14 12:51:44,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461589559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:44,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:51:44,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:51:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483934483] [2022-12-14 12:51:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:51:44,448 INFO L87 Difference]: Start difference. First operand 10035 states and 15633 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:45,142 INFO L93 Difference]: Finished difference Result 26524 states and 40314 transitions. [2022-12-14 12:51:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 12:51:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:45,203 INFO L225 Difference]: With dead ends: 26524 [2022-12-14 12:51:45,203 INFO L226 Difference]: Without dead ends: 18135 [2022-12-14 12:51:45,228 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 [2022-12-14 12:51:45,229 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:45,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2022-12-14 12:51:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 18035. [2022-12-14 12:51:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 15339 states have (on average 1.5317165395397354) internal successors, (23495), 15406 states have internal predecessors, (23495), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-12-14 12:51:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 27217 transitions. [2022-12-14 12:51:45,714 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 27217 transitions. Word has length 137 [2022-12-14 12:51:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:45,715 INFO L495 AbstractCegarLoop]: Abstraction has 18035 states and 27217 transitions. [2022-12-14 12:51:45,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 27217 transitions. [2022-12-14 12:51:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:51:45,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:45,737 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, 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] [2022-12-14 12:51:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:51:45,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -871544726, now seen corresponding path program 1 times [2022-12-14 12:51:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:45,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789682731] [2022-12-14 12:51:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 12:51:45,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:45,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789682731] [2022-12-14 12:51:45,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789682731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:45,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:51:45,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:51:45,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286359449] [2022-12-14 12:51:45,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:51:45,790 INFO L87 Difference]: Start difference. First operand 18035 states and 27217 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:46,908 INFO L93 Difference]: Finished difference Result 50236 states and 74970 transitions. [2022-12-14 12:51:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-12-14 12:51:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:47,020 INFO L225 Difference]: With dead ends: 50236 [2022-12-14 12:51:47,021 INFO L226 Difference]: Without dead ends: 33847 [2022-12-14 12:51:47,054 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 [2022-12-14 12:51:47,055 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3440 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3440 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:47,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3440 Valid, 3417 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2022-12-14 12:51:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33651. [2022-12-14 12:51:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 28395 states have (on average 1.4945941186828666) internal successors, (42439), 28526 states have internal predecessors, (42439), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 12:51:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 49617 transitions. [2022-12-14 12:51:47,971 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 49617 transitions. Word has length 137 [2022-12-14 12:51:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:47,971 INFO L495 AbstractCegarLoop]: Abstraction has 33651 states and 49617 transitions. [2022-12-14 12:51:47,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:51:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 49617 transitions. [2022-12-14 12:51:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:51:48,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:48,023 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, 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] [2022-12-14 12:51:48,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:51:48,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1315571682, now seen corresponding path program 1 times [2022-12-14 12:51:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:48,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351062782] [2022-12-14 12:51:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:51:48,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351062782] [2022-12-14 12:51:48,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351062782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675605632] [2022-12-14 12:51:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:48,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:48,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:48,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:51:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:51:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:51:48,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:48,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675605632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:48,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:48,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:51:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166567111] [2022-12-14 12:51:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:48,427 INFO L87 Difference]: Start difference. First operand 33651 states and 49617 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:51:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:49,746 INFO L93 Difference]: Finished difference Result 50171 states and 74711 transitions. [2022-12-14 12:51:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 157 [2022-12-14 12:51:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:49,822 INFO L225 Difference]: With dead ends: 50171 [2022-12-14 12:51:49,822 INFO L226 Difference]: Without dead ends: 33783 [2022-12-14 12:51:49,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:49,852 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 164 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 6568 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:51:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33783 states. [2022-12-14 12:51:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33783 to 33523. [2022-12-14 12:51:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33523 states, 28267 states have (on average 1.4787207698022429) internal successors, (41799), 28398 states have internal predecessors, (41799), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 12:51:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33523 states to 33523 states and 48977 transitions. [2022-12-14 12:51:50,805 INFO L78 Accepts]: Start accepts. Automaton has 33523 states and 48977 transitions. Word has length 157 [2022-12-14 12:51:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:50,806 INFO L495 AbstractCegarLoop]: Abstraction has 33523 states and 48977 transitions. [2022-12-14 12:51:50,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:51:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 33523 states and 48977 transitions. [2022-12-14 12:51:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:51:50,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:50,851 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, 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] [2022-12-14 12:51:50,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:51:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:51:51,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 812506144, now seen corresponding path program 1 times [2022-12-14 12:51:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978585528] [2022-12-14 12:51:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:51,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:51:51,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:51,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978585528] [2022-12-14 12:51:51,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978585528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:51,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000756431] [2022-12-14 12:51:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:51,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:51,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:51,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:51:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 12:51:51,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:51,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000756431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:51,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:51,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:51:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735263906] [2022-12-14 12:51:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:51,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:51,413 INFO L87 Difference]: Start difference. First operand 33523 states and 48977 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:51:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:52,817 INFO L93 Difference]: Finished difference Result 58161 states and 83086 transitions. [2022-12-14 12:51:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 157 [2022-12-14 12:51:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:52,911 INFO L225 Difference]: With dead ends: 58161 [2022-12-14 12:51:52,911 INFO L226 Difference]: Without dead ends: 41965 [2022-12-14 12:51:52,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:52,948 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3443 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:52,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3290 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41965 states. [2022-12-14 12:51:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41965 to 41965. [2022-12-14 12:51:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41965 states, 35945 states have (on average 1.4227569898455974) internal successors, (51141), 36076 states have internal predecessors, (51141), 3844 states have call successors, (3844), 2175 states have call predecessors, (3844), 2174 states have return successors, (3842), 3714 states have call predecessors, (3842), 3842 states have call successors, (3842) [2022-12-14 12:51:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41965 states to 41965 states and 58827 transitions. [2022-12-14 12:51:54,251 INFO L78 Accepts]: Start accepts. Automaton has 41965 states and 58827 transitions. Word has length 157 [2022-12-14 12:51:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:54,251 INFO L495 AbstractCegarLoop]: Abstraction has 41965 states and 58827 transitions. [2022-12-14 12:51:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:51:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 41965 states and 58827 transitions. [2022-12-14 12:51:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 12:51:54,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:54,306 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, 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] [2022-12-14 12:51:54,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:51:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:51:54,508 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash -826233207, now seen corresponding path program 1 times [2022-12-14 12:51:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:54,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205424716] [2022-12-14 12:51:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:51:54,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205424716] [2022-12-14 12:51:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205424716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184108766] [2022-12-14 12:51:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:54,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:54,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:54,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:54,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:51:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:51:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:51:54,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:54,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184108766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:54,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:54,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 12:51:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933471616] [2022-12-14 12:51:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:54,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:51:54,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:51:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:51:54,913 INFO L87 Difference]: Start difference. First operand 41965 states and 58827 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:51:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:57,619 INFO L93 Difference]: Finished difference Result 124387 states and 172223 transitions. [2022-12-14 12:51:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:51:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 158 [2022-12-14 12:51:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:57,846 INFO L225 Difference]: With dead ends: 124387 [2022-12-14 12:51:57,846 INFO L226 Difference]: Without dead ends: 84069 [2022-12-14 12:51:57,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:51:57,913 INFO L413 NwaCegarLoop]: 3408 mSDtfsCounter, 3465 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 6945 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:57,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 6945 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:51:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84069 states. [2022-12-14 12:52:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84069 to 83937. [2022-12-14 12:52:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83937 states, 71909 states have (on average 1.4000055625860464) internal successors, (100673), 72296 states have internal predecessors, (100673), 7552 states have call successors, (7552), 4347 states have call predecessors, (7552), 4474 states have return successors, (7934), 7294 states have call predecessors, (7934), 7550 states have call successors, (7934) [2022-12-14 12:52:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83937 states to 83937 states and 116159 transitions. [2022-12-14 12:52:00,771 INFO L78 Accepts]: Start accepts. Automaton has 83937 states and 116159 transitions. Word has length 158 [2022-12-14 12:52:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:00,772 INFO L495 AbstractCegarLoop]: Abstraction has 83937 states and 116159 transitions. [2022-12-14 12:52:00,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:52:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 83937 states and 116159 transitions. [2022-12-14 12:52:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 12:52:00,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:00,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:52:00,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:52:01,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:01,096 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1863668986, now seen corresponding path program 1 times [2022-12-14 12:52:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271147858] [2022-12-14 12:52:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:52:01,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271147858] [2022-12-14 12:52:01,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271147858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837422439] [2022-12-14 12:52:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:01,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:01,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:52:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:52:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:52:01,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:01,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837422439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:01,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:01,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:52:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107615631] [2022-12-14 12:52:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:52:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:52:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:52:01,445 INFO L87 Difference]: Start difference. First operand 83937 states and 116159 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:52:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:05,233 INFO L93 Difference]: Finished difference Result 193485 states and 271012 transitions. [2022-12-14 12:52:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:52:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 158 [2022-12-14 12:52:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:05,569 INFO L225 Difference]: With dead ends: 193485 [2022-12-14 12:52:05,569 INFO L226 Difference]: Without dead ends: 111195 [2022-12-14 12:52:05,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:52:05,707 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 93 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6463 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:05,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6463 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:52:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111195 states. [2022-12-14 12:52:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111195 to 92909. [2022-12-14 12:52:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92909 states, 80363 states have (on average 1.4280079140898174) internal successors, (114759), 80752 states have internal predecessors, (114759), 7811 states have call successors, (7811), 4606 states have call predecessors, (7811), 4733 states have return successors, (8193), 7551 states have call predecessors, (8193), 7809 states have call successors, (8193) [2022-12-14 12:52:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92909 states to 92909 states and 130763 transitions. [2022-12-14 12:52:09,200 INFO L78 Accepts]: Start accepts. Automaton has 92909 states and 130763 transitions. Word has length 158 [2022-12-14 12:52:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:09,200 INFO L495 AbstractCegarLoop]: Abstraction has 92909 states and 130763 transitions. [2022-12-14 12:52:09,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:52:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 92909 states and 130763 transitions. [2022-12-14 12:52:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 12:52:09,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:09,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:52:09,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:52:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:52:09,529 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2136340237, now seen corresponding path program 2 times [2022-12-14 12:52:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120511636] [2022-12-14 12:52:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 12:52:09,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:09,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120511636] [2022-12-14 12:52:09,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120511636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:09,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940524165] [2022-12-14 12:52:09,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:52:09,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:09,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:09,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:09,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:52:09,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:52:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:52:09,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:52:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:52:09,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:09,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940524165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:09,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:09,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:52:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541970852] [2022-12-14 12:52:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:09,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:52:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:52:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:52:09,783 INFO L87 Difference]: Start difference. First operand 92909 states and 130763 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:52:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:13,648 INFO L93 Difference]: Finished difference Result 177327 states and 251589 transitions. [2022-12-14 12:52:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:52:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 158 [2022-12-14 12:52:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:13,951 INFO L225 Difference]: With dead ends: 177327 [2022-12-14 12:52:13,951 INFO L226 Difference]: Without dead ends: 130891 [2022-12-14 12:52:14,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:52:14,037 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 132 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6581 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:14,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6581 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:52:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130891 states. [2022-12-14 12:52:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130891 to 109293. [2022-12-14 12:52:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109293 states, 95723 states have (on average 1.4636294307533195) internal successors, (140103), 96112 states have internal predecessors, (140103), 8323 states have call successors, (8323), 5118 states have call predecessors, (8323), 5245 states have return successors, (8705), 8063 states have call predecessors, (8705), 8321 states have call successors, (8705) [2022-12-14 12:52:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109293 states to 109293 states and 157131 transitions. [2022-12-14 12:52:18,653 INFO L78 Accepts]: Start accepts. Automaton has 109293 states and 157131 transitions. Word has length 158 [2022-12-14 12:52:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:18,654 INFO L495 AbstractCegarLoop]: Abstraction has 109293 states and 157131 transitions. [2022-12-14 12:52:18,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:52:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 109293 states and 157131 transitions. [2022-12-14 12:52:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 12:52:18,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:18,794 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, 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] [2022-12-14 12:52:18,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:52:18,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:52:18,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -762181207, now seen corresponding path program 1 times [2022-12-14 12:52:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:18,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582726354] [2022-12-14 12:52:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:18,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:52:19,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582726354] [2022-12-14 12:52:19,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582726354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264904017] [2022-12-14 12:52:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:19,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:19,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:19,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:52:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:52:19,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 12:52:19,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:19,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264904017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:19,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:52:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957509138] [2022-12-14 12:52:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:52:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:52:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:52:19,424 INFO L87 Difference]: Start difference. First operand 109293 states and 157131 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:52:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:25,555 INFO L93 Difference]: Finished difference Result 268477 states and 384537 transitions. [2022-12-14 12:52:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:52:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-12-14 12:52:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:25,910 INFO L225 Difference]: With dead ends: 268477 [2022-12-14 12:52:25,910 INFO L226 Difference]: Without dead ends: 160831 [2022-12-14 12:52:26,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:52:26,028 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 7181 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7197 SdHoareTripleChecker+Valid, 9557 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:26,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7197 Valid, 9557 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:52:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160831 states. [2022-12-14 12:52:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160831 to 160827. [2022-12-14 12:52:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160827 states, 140613 states have (on average 1.4498872792700532) internal successors, (203873), 141194 states have internal predecessors, (203873), 12349 states have call successors, (12349), 7672 states have call predecessors, (12349), 7863 states have return successors, (12923), 11961 states have call predecessors, (12923), 12347 states have call successors, (12923) [2022-12-14 12:52:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160827 states to 160827 states and 229145 transitions. [2022-12-14 12:52:32,421 INFO L78 Accepts]: Start accepts. Automaton has 160827 states and 229145 transitions. Word has length 159 [2022-12-14 12:52:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:32,421 INFO L495 AbstractCegarLoop]: Abstraction has 160827 states and 229145 transitions. [2022-12-14 12:52:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:52:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 160827 states and 229145 transitions. [2022-12-14 12:52:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 12:52:32,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:32,755 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, 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] [2022-12-14 12:52:32,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:52:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:52:32,957 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash -858972717, now seen corresponding path program 1 times [2022-12-14 12:52:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:32,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21571391] [2022-12-14 12:52:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:52:33,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21571391] [2022-12-14 12:52:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21571391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695142767] [2022-12-14 12:52:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:33,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:33,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:33,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:52:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:52:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 12:52:33,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:33,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695142767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:33,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:33,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:52:33,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8314943] [2022-12-14 12:52:33,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:33,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:52:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:52:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:52:33,389 INFO L87 Difference]: Start difference. First operand 160827 states and 229145 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:52:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:43,446 INFO L93 Difference]: Finished difference Result 395591 states and 561731 transitions. [2022-12-14 12:52:43,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:52:43,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-12-14 12:52:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:44,033 INFO L225 Difference]: With dead ends: 395591 [2022-12-14 12:52:44,033 INFO L226 Difference]: Without dead ends: 236411 [2022-12-14 12:52:44,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:52:44,354 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 7177 mSDsluCounter, 6332 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7193 SdHoareTripleChecker+Valid, 9552 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:44,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7193 Valid, 9552 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:52:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236411 states. [2022-12-14 12:52:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236411 to 236407. [2022-12-14 12:52:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236407 states, 206297 states have (on average 1.4350814602248214) internal successors, (296053), 207166 states have internal predecessors, (296053), 18321 states have call successors, (18321), 11500 states have call predecessors, (18321), 11787 states have return successors, (19183), 17741 states have call predecessors, (19183), 18319 states have call successors, (19183) [2022-12-14 12:52:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236407 states to 236407 states and 333557 transitions. [2022-12-14 12:52:54,682 INFO L78 Accepts]: Start accepts. Automaton has 236407 states and 333557 transitions. Word has length 161 [2022-12-14 12:52:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 236407 states and 333557 transitions. [2022-12-14 12:52:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:52:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 236407 states and 333557 transitions. [2022-12-14 12:52:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 12:52:55,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:55,139 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, 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] [2022-12-14 12:52:55,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:52:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:55,341 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409321, now seen corresponding path program 1 times [2022-12-14 12:52:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084670968] [2022-12-14 12:52:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 12:52:55,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084670968] [2022-12-14 12:52:55,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084670968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264662748] [2022-12-14 12:52:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:55,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:55,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:52:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:52:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 12:52:55,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:55,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264662748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:55,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:55,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 12:52:55,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142184510] [2022-12-14 12:52:55,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:55,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:52:55,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:52:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:52:55,682 INFO L87 Difference]: Start difference. First operand 236407 states and 333557 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:53:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:05,499 INFO L93 Difference]: Finished difference Result 423424 states and 594406 transitions. [2022-12-14 12:53:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:53:05,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 163 [2022-12-14 12:53:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:06,024 INFO L225 Difference]: With dead ends: 423424 [2022-12-14 12:53:06,024 INFO L226 Difference]: Without dead ends: 188664 [2022-12-14 12:53:06,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:53:06,251 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 7163 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7179 SdHoareTripleChecker+Valid, 9590 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:06,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7179 Valid, 9590 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:53:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188664 states. [2022-12-14 12:53:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188664 to 181469. [2022-12-14 12:53:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181469 states, 158438 states have (on average 1.4313990330602506) internal successors, (226788), 159162 states have internal predecessors, (226788), 13823 states have call successors, (13823), 8631 states have call predecessors, (13823), 9206 states have return successors, (14397), 13676 states have call predecessors, (14397), 13821 states have call successors, (14397) [2022-12-14 12:53:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181469 states to 181469 states and 255008 transitions. [2022-12-14 12:53:15,284 INFO L78 Accepts]: Start accepts. Automaton has 181469 states and 255008 transitions. Word has length 163 [2022-12-14 12:53:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:15,285 INFO L495 AbstractCegarLoop]: Abstraction has 181469 states and 255008 transitions. [2022-12-14 12:53:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:53:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 181469 states and 255008 transitions. [2022-12-14 12:53:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 12:53:15,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:15,538 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, 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] [2022-12-14 12:53:15,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:53:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:53:15,739 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -874568221, now seen corresponding path program 2 times [2022-12-14 12:53:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:15,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954457980] [2022-12-14 12:53:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 12:53:15,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954457980] [2022-12-14 12:53:15,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954457980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:53:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090133960] [2022-12-14 12:53:15,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:53:15,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:15,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:15,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:53:16,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:53:16,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:53:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:53:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 12:53:16,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:53:16,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090133960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:16,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:53:16,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:53:16,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146224531] [2022-12-14 12:53:16,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:16,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:53:16,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:53:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:53:16,057 INFO L87 Difference]: Start difference. First operand 181469 states and 255008 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:53:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:24,056 INFO L93 Difference]: Finished difference Result 243141 states and 342551 transitions. [2022-12-14 12:53:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:53:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 164 [2022-12-14 12:53:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:24,441 INFO L225 Difference]: With dead ends: 243141 [2022-12-14 12:53:24,441 INFO L226 Difference]: Without dead ends: 173309 [2022-12-14 12:53:24,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:53:24,545 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 46 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6464 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:24,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6464 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:53:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173309 states. [2022-12-14 12:53:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173309 to 162269. [2022-12-14 12:53:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162269 states, 140966 states have (on average 1.4484343742462722) internal successors, (204180), 141258 states have internal predecessors, (204180), 13247 states have call successors, (13247), 8055 states have call predecessors, (13247), 8054 states have return successors, (13245), 12956 states have call predecessors, (13245), 13245 states have call successors, (13245) [2022-12-14 12:53:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162269 states to 162269 states and 230672 transitions. [2022-12-14 12:53:32,545 INFO L78 Accepts]: Start accepts. Automaton has 162269 states and 230672 transitions. Word has length 164 [2022-12-14 12:53:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:32,545 INFO L495 AbstractCegarLoop]: Abstraction has 162269 states and 230672 transitions. [2022-12-14 12:53:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:53:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 162269 states and 230672 transitions. [2022-12-14 12:53:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 12:53:32,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:32,784 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, 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] [2022-12-14 12:53:32,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 12:53:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:53:32,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1182730874, now seen corresponding path program 1 times [2022-12-14 12:53:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:32,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704617853] [2022-12-14 12:53:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:53:33,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704617853] [2022-12-14 12:53:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704617853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:53:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498556989] [2022-12-14 12:53:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:33,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:33,363 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:33,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:53:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:53:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 12:53:33,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:53:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498556989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:33,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:53:33,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 12:53:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234408269] [2022-12-14 12:53:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:53:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:53:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:53:33,602 INFO L87 Difference]: Start difference. First operand 162269 states and 230672 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:53:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:46,242 INFO L93 Difference]: Finished difference Result 398489 states and 564306 transitions. [2022-12-14 12:53:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:53:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 164 [2022-12-14 12:53:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:46,930 INFO L225 Difference]: With dead ends: 398489 [2022-12-14 12:53:46,931 INFO L226 Difference]: Without dead ends: 237921 [2022-12-14 12:53:47,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:53:47,118 INFO L413 NwaCegarLoop]: 3219 mSDtfsCounter, 7183 mSDsluCounter, 6347 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7199 SdHoareTripleChecker+Valid, 9566 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:47,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7199 Valid, 9566 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:53:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237921 states. [2022-12-14 12:53:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237921 to 237917. [2022-12-14 12:53:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237917 states, 206206 states have (on average 1.4310931786659942) internal successors, (295100), 206642 states have internal predecessors, (295100), 19639 states have call successors, (19639), 12071 states have call predecessors, (19639), 12070 states have return successors, (19637), 19204 states have call predecessors, (19637), 19637 states have call successors, (19637) [2022-12-14 12:54:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237917 states to 237917 states and 334376 transitions. [2022-12-14 12:54:00,318 INFO L78 Accepts]: Start accepts. Automaton has 237917 states and 334376 transitions. Word has length 164 [2022-12-14 12:54:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:00,318 INFO L495 AbstractCegarLoop]: Abstraction has 237917 states and 334376 transitions. [2022-12-14 12:54:00,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:54:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 237917 states and 334376 transitions. [2022-12-14 12:54:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 12:54:00,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:00,663 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, 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] [2022-12-14 12:54:00,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:54:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:00,865 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash 204915064, now seen corresponding path program 1 times [2022-12-14 12:54:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762342612] [2022-12-14 12:54:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:54:01,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762342612] [2022-12-14 12:54:01,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762342612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:01,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877292187] [2022-12-14 12:54:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:01,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:01,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:01,014 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:01,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:54:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:01,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:54:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 12:54:01,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:01,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877292187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:01,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:01,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:54:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404529596] [2022-12-14 12:54:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:54:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:54:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:54:01,212 INFO L87 Difference]: Start difference. First operand 237917 states and 334376 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:54:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:21,819 INFO L93 Difference]: Finished difference Result 586253 states and 821814 transitions. [2022-12-14 12:54:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:54:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 166 [2022-12-14 12:54:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:22,844 INFO L225 Difference]: With dead ends: 586253 [2022-12-14 12:54:22,845 INFO L226 Difference]: Without dead ends: 350037 [2022-12-14 12:54:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:54:23,251 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 7156 mSDsluCounter, 6327 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7172 SdHoareTripleChecker+Valid, 9558 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7172 Valid, 9558 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:54:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350037 states. [2022-12-14 12:54:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350037 to 350033. [2022-12-14 12:54:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350033 states, 302834 states have (on average 1.415508166190058) internal successors, (428664), 303486 states have internal predecessors, (428664), 29111 states have call successors, (29111), 18087 states have call predecessors, (29111), 18086 states have return successors, (29109), 28460 states have call predecessors, (29109), 29109 states have call successors, (29109) [2022-12-14 12:54:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350033 states to 350033 states and 486884 transitions. [2022-12-14 12:54:44,668 INFO L78 Accepts]: Start accepts. Automaton has 350033 states and 486884 transitions. Word has length 166 [2022-12-14 12:54:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:44,668 INFO L495 AbstractCegarLoop]: Abstraction has 350033 states and 486884 transitions. [2022-12-14 12:54:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:54:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 350033 states and 486884 transitions. [2022-12-14 12:54:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 12:54:45,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:45,339 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, 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] [2022-12-14 12:54:45,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:54:45,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:45,541 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1673718958, now seen corresponding path program 1 times [2022-12-14 12:54:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974509201] [2022-12-14 12:54:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:54:45,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974509201] [2022-12-14 12:54:45,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974509201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254638206] [2022-12-14 12:54:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:45,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:45,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:54:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:54:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:54:45,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254638206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:45,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:45,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:54:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499514176] [2022-12-14 12:54:45,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:45,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:54:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:54:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:54:45,967 INFO L87 Difference]: Start difference. First operand 350033 states and 486884 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:55:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:11,789 INFO L93 Difference]: Finished difference Result 678233 states and 950914 transitions. [2022-12-14 12:55:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:11,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 164 [2022-12-14 12:55:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:13,142 INFO L225 Difference]: With dead ends: 678233 [2022-12-14 12:55:13,142 INFO L226 Difference]: Without dead ends: 444829 [2022-12-14 12:55:13,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:55:13,479 INFO L413 NwaCegarLoop]: 3345 mSDtfsCounter, 123 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:13,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 6575 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:55:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444829 states. [2022-12-14 12:55:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444829 to 405113. [2022-12-14 12:55:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405113 states, 354026 states have (on average 1.4350471434301435) internal successors, (508044), 354678 states have internal predecessors, (508044), 31055 states have call successors, (31055), 20031 states have call predecessors, (31055), 20030 states have return successors, (31053), 30404 states have call predecessors, (31053), 31053 states have call successors, (31053) [2022-12-14 12:55:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405113 states to 405113 states and 570152 transitions. [2022-12-14 12:55:37,786 INFO L78 Accepts]: Start accepts. Automaton has 405113 states and 570152 transitions. Word has length 164 [2022-12-14 12:55:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:37,787 INFO L495 AbstractCegarLoop]: Abstraction has 405113 states and 570152 transitions. [2022-12-14 12:55:37,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:55:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 405113 states and 570152 transitions. [2022-12-14 12:55:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 12:55:38,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:38,351 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, 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] [2022-12-14 12:55:38,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:55:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 12:55:38,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1591206062, now seen corresponding path program 1 times [2022-12-14 12:55:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:38,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656118794] [2022-12-14 12:55:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:55:38,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656118794] [2022-12-14 12:55:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656118794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442415682] [2022-12-14 12:55:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:38,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:38,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:38,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:55:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:55:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:55:38,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442415682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:38,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:38,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:55:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009010209] [2022-12-14 12:55:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:55:38,975 INFO L87 Difference]: Start difference. First operand 405113 states and 570152 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:56:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:02,245 INFO L93 Difference]: Finished difference Result 694249 states and 989826 transitions. [2022-12-14 12:56:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:56:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 166 [2022-12-14 12:56:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:03,452 INFO L225 Difference]: With dead ends: 694249 [2022-12-14 12:56:03,453 INFO L226 Difference]: Without dead ends: 405765 [2022-12-14 12:56:03,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:56:03,836 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 156 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:03,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 6566 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:56:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405765 states. [2022-12-14 12:56:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405765 to 402521. [2022-12-14 12:56:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402521 states, 351434 states have (on average 1.4210463415605776) internal successors, (499404), 352086 states have internal predecessors, (499404), 31055 states have call successors, (31055), 20031 states have call predecessors, (31055), 20030 states have return successors, (31053), 30404 states have call predecessors, (31053), 31053 states have call successors, (31053) [2022-12-14 12:56:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402521 states to 402521 states and 561512 transitions. [2022-12-14 12:56:28,745 INFO L78 Accepts]: Start accepts. Automaton has 402521 states and 561512 transitions. Word has length 166 [2022-12-14 12:56:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:28,746 INFO L495 AbstractCegarLoop]: Abstraction has 402521 states and 561512 transitions. [2022-12-14 12:56:28,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:56:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 402521 states and 561512 transitions. [2022-12-14 12:56:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 12:56:29,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:29,297 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, 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] [2022-12-14 12:56:29,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 12:56:29,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:56:29,499 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1516822060, now seen corresponding path program 1 times [2022-12-14 12:56:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670315330] [2022-12-14 12:56:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:56:29,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670315330] [2022-12-14 12:56:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670315330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:56:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112320833] [2022-12-14 12:56:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:56:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:56:29,692 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:56:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:56:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:29,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:56:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:56:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:56:30,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:56:30,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112320833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:56:30,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:56:30,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:56:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002689370] [2022-12-14 12:56:30,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:56:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:56:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:56:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:56:30,050 INFO L87 Difference]: Start difference. First operand 402521 states and 561512 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:57:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:06,153 INFO L93 Difference]: Finished difference Result 959429 states and 1332366 transitions. [2022-12-14 12:57:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:57:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 166 [2022-12-14 12:57:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:07,824 INFO L225 Difference]: With dead ends: 959429 [2022-12-14 12:57:07,824 INFO L226 Difference]: Without dead ends: 558609 [2022-12-14 12:57:08,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:57:08,320 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 7145 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7161 SdHoareTripleChecker+Valid, 9549 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:08,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7161 Valid, 9549 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:57:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558609 states. [2022-12-14 12:57:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558609 to 558605. [2022-12-14 12:57:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558605 states, 485128 states have (on average 1.400628287792088) internal successors, (679484), 486104 states have internal predecessors, (679484), 44761 states have call successors, (44761), 28715 states have call predecessors, (44761), 28714 states have return successors, (44759), 43786 states have call predecessors, (44759), 44759 states have call successors, (44759) [2022-12-14 12:57:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558605 states to 558605 states and 769004 transitions. [2022-12-14 12:57:49,926 INFO L78 Accepts]: Start accepts. Automaton has 558605 states and 769004 transitions. Word has length 166 [2022-12-14 12:57:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:49,926 INFO L495 AbstractCegarLoop]: Abstraction has 558605 states and 769004 transitions. [2022-12-14 12:57:49,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:57:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 558605 states and 769004 transitions. [2022-12-14 12:57:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 12:57:50,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:50,823 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, 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] [2022-12-14 12:57:50,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 12:57:51,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 12:57:51,025 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash -764754298, now seen corresponding path program 1 times [2022-12-14 12:57:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:51,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641133619] [2022-12-14 12:57:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:57:51,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:51,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641133619] [2022-12-14 12:57:51,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641133619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345977905] [2022-12-14 12:57:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:51,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:51,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:51,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:51,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:57:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:57:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 12:57:51,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:51,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345977905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:51,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:51,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 12:57:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331593175] [2022-12-14 12:57:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:51,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:57:51,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:57:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:51,350 INFO L87 Difference]: Start difference. First operand 558605 states and 769004 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:58:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:50,879 INFO L93 Difference]: Finished difference Result 1375382 states and 1887666 transitions. [2022-12-14 12:58:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:58:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 168 [2022-12-14 12:58:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:53,357 INFO L225 Difference]: With dead ends: 1375382 [2022-12-14 12:58:53,358 INFO L226 Difference]: Without dead ends: 818478 [2022-12-14 12:58:54,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:58:54,312 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 3785 mSDsluCounter, 6420 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 9638 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:54,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 9638 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:58:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818478 states. [2022-12-14 12:59:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818478 to 818474. [2022-12-14 12:59:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818474 states, 709127 states have (on average 1.3804974285283171) internal successors, (978948), 710589 states have internal predecessors, (978948), 66341 states have call successors, (66341), 43005 states have call predecessors, (66341), 43004 states have return successors, (66339), 64880 states have call predecessors, (66339), 66339 states have call successors, (66339) [2022-12-14 13:00:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818474 states to 818474 states and 1111628 transitions. [2022-12-14 13:00:00,184 INFO L78 Accepts]: Start accepts. Automaton has 818474 states and 1111628 transitions. Word has length 168 [2022-12-14 13:00:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:00,185 INFO L495 AbstractCegarLoop]: Abstraction has 818474 states and 1111628 transitions. [2022-12-14 13:00:00,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:00:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 818474 states and 1111628 transitions. [2022-12-14 13:00:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 13:00:01,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:01,860 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, 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] [2022-12-14 13:00:01,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:00:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:02,061 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1053956896, now seen corresponding path program 1 times [2022-12-14 13:00:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831587252] [2022-12-14 13:00:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:00:02,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831587252] [2022-12-14 13:00:02,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831587252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884071317] [2022-12-14 13:00:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:02,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:02,232 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed933483-0fda-4da1-9d3e-f39503414445/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:00:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:02,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:00:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:00:02,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:00:02,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884071317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:02,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:00:02,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 13:00:02,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626575865] [2022-12-14 13:00:02,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:02,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:00:02,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:00:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:00:02,444 INFO L87 Difference]: Start difference. First operand 818474 states and 1111628 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)