./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI --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 0385e1d16d423c194d4048fc3b294994e5a7e416b8435d95ed6181aeb075af1b --- 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-5e519f3 [2022-11-03 02:10:12,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:10:12,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:10:12,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:10:12,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:10:12,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:10:12,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:10:12,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:10:12,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:10:12,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:10:12,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:10:12,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:10:12,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:10:12,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:10:12,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:10:12,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:10:12,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:10:12,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:10:12,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:10:12,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:10:12,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:10:12,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:10:12,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:10:12,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:10:12,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:10:12,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:10:12,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:10:12,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:10:12,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:10:12,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:10:12,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:10:12,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:10:12,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:10:12,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:10:12,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:10:12,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:10:12,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:10:12,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:10:12,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:10:12,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:10:12,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:10:12,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:10:12,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:10:12,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:10:12,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:10:12,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:10:12,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:10:12,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:10:12,352 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:10:12,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:10:12,353 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:10:12,353 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:10:12,354 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:10:12,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:10:12,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:10:12,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:10:12,355 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:10:12,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:10:12,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:10:12,355 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:10:12,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:10:12,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:10:12,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:10:12,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:10:12,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:10:12,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:10:12,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:10:12,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:10:12,359 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:10:12,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:10:12,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:10:12,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:10:12,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:10:12,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:10:12,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:12,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:10:12,361 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:10:12,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:10:12,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:10:12,362 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:10:12,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:10:12,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:10:12,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:10:12,362 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_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0385e1d16d423c194d4048fc3b294994e5a7e416b8435d95ed6181aeb075af1b [2022-11-03 02:10:12,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:10:12,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:10:12,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:10:12,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:10:12,689 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:10:12,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c [2022-11-03 02:10:12,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/data/036fdd251/0d365a7ce8124594bb9c6cff94829863/FLAG8b9b528de [2022-11-03 02:10:13,789 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:10:13,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c [2022-11-03 02:10:13,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/data/036fdd251/0d365a7ce8124594bb9c6cff94829863/FLAG8b9b528de [2022-11-03 02:10:14,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/data/036fdd251/0d365a7ce8124594bb9c6cff94829863 [2022-11-03 02:10:14,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:10:14,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:10:14,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:14,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:10:14,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:10:14,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:14" (1/1) ... [2022-11-03 02:10:14,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8574067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:14, skipping insertion in model container [2022-11-03 02:10:14,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:14" (1/1) ... [2022-11-03 02:10:14,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:10:14,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:10:16,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[382357,382370] [2022-11-03 02:10:17,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[383339,383352] [2022-11-03 02:10:17,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:17,332 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:10:18,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[382357,382370] [2022-11-03 02:10:18,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[383339,383352] [2022-11-03 02:10:18,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:18,671 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:10:18,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18 WrapperNode [2022-11-03 02:10:18,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:18,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:18,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:10:18,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:10:18,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:18,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,151 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-11-03 02:10:19,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:19,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:10:19,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:10:19,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:10:19,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,540 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:10:19,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:10:19,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:10:19,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:10:19,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (1/1) ... [2022-11-03 02:10:19,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:19,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:19,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:10:19,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:10:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:10:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:10:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:10:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:10:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:10:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:10:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:10:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:10:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:10:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:10:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:10:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:10:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:10:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:10:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:10:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:10:19,943 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:10:19,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:10:29,012 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:10:31,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:10:31,147 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 02:10:31,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:31 BoogieIcfgContainer [2022-11-03 02:10:31,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:10:31,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:10:31,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:10:31,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:10:31,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:10:14" (1/3) ... [2022-11-03 02:10:31,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63185825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:31, skipping insertion in model container [2022-11-03 02:10:31,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:18" (2/3) ... [2022-11-03 02:10:31,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63185825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:31, skipping insertion in model container [2022-11-03 02:10:31,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:31" (3/3) ... [2022-11-03 02:10:31,165 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.08.cil-1.c [2022-11-03 02:10:31,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:10:31,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:10:31,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:10:31,293 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;@2283f43a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:10:31,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:10:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 02:10:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:10:31,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:31,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:31,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2067760076, now seen corresponding path program 1 times [2022-11-03 02:10:31,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:31,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25767632] [2022-11-03 02:10:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:31,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25767632] [2022-11-03 02:10:31,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25767632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:31,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:31,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182822174] [2022-11-03 02:10:31,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:31,871 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:10:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:32,854 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-11-03 02:10:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:10:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-11-03 02:10:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:32,878 INFO L225 Difference]: With dead ends: 3701 [2022-11-03 02:10:32,879 INFO L226 Difference]: Without dead ends: 1913 [2022-11-03 02:10:32,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:32,889 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3593 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:32,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:10:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-03 02:10:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-11-03 02:10:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:10:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-11-03 02:10:33,031 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-11-03 02:10:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:33,032 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-11-03 02:10:33,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:10:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-11-03 02:10:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:10:33,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:33,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:10:33,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash -202779791, now seen corresponding path program 1 times [2022-11-03 02:10:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456577975] [2022-11-03 02:10:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:33,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:10:33,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456577975] [2022-11-03 02:10:33,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456577975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:33,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40253222] [2022-11-03 02:10:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:33,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:33,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:33,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:10:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:10:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:10:33,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40253222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:33,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:10:33,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:10:33,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29568808] [2022-11-03 02:10:33,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:33,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:33,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:33,660 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:34,177 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-11-03 02:10:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:10:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:34,193 INFO L225 Difference]: With dead ends: 2437 [2022-11-03 02:10:34,194 INFO L226 Difference]: Without dead ends: 2171 [2022-11-03 02:10:34,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:34,198 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:34,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-03 02:10:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-11-03 02:10:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:10:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-11-03 02:10:34,294 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-11-03 02:10:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:34,294 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-11-03 02:10:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-11-03 02:10:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:10:34,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:34,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:34,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:10:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:34,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1062348527, now seen corresponding path program 1 times [2022-11-03 02:10:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:34,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522747441] [2022-11-03 02:10:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:10:34,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522747441] [2022-11-03 02:10:34,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522747441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:34,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646096375] [2022-11-03 02:10:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:34,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:34,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:34,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:10:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:10:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:10:35,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646096375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:35,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:10:35,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:10:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123158248] [2022-11-03 02:10:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:35,153 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:35,707 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-11-03 02:10:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:10:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:35,725 INFO L225 Difference]: With dead ends: 3196 [2022-11-03 02:10:35,726 INFO L226 Difference]: Without dead ends: 2675 [2022-11-03 02:10:35,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:35,732 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3456 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:35,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-03 02:10:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-11-03 02:10:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-03 02:10:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-11-03 02:10:35,854 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-11-03 02:10:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:35,856 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-11-03 02:10:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-11-03 02:10:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:10:35,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:35,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:35,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:36,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 763766641, now seen corresponding path program 1 times [2022-11-03 02:10:36,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:36,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88668633] [2022-11-03 02:10:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:10:36,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:36,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88668633] [2022-11-03 02:10:36,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88668633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613043463] [2022-11-03 02:10:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:36,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:36,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:36,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:10:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:10:36,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613043463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:36,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:10:36,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:10:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266433318] [2022-11-03 02:10:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:36,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:36,579 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:37,110 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-11-03 02:10:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:10:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:37,132 INFO L225 Difference]: With dead ends: 4690 [2022-11-03 02:10:37,132 INFO L226 Difference]: Without dead ends: 3667 [2022-11-03 02:10:37,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:37,141 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 3453 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:37,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3438 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-11-03 02:10:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-11-03 02:10:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-03 02:10:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-11-03 02:10:37,300 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-11-03 02:10:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:37,300 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-11-03 02:10:37,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-11-03 02:10:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:10:37,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:37,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:37,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 02:10:37,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -430476015, now seen corresponding path program 1 times [2022-11-03 02:10:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:37,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375159791] [2022-11-03 02:10:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:10:37,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375159791] [2022-11-03 02:10:37,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375159791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124093009] [2022-11-03 02:10:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:37,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:37,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:10:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:10:37,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:10:37,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:37,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124093009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:37,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:10:37,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:10:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685170964] [2022-11-03 02:10:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:37,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:37,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:37,939 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:38,530 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-11-03 02:10:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-11-03 02:10:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:38,554 INFO L225 Difference]: With dead ends: 7630 [2022-11-03 02:10:38,554 INFO L226 Difference]: Without dead ends: 5619 [2022-11-03 02:10:38,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:38,563 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:38,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-11-03 02:10:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-11-03 02:10:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-03 02:10:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-11-03 02:10:38,949 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-11-03 02:10:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:38,949 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-11-03 02:10:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:10:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-11-03 02:10:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:10:38,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:38,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:39,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2122829135, now seen corresponding path program 1 times [2022-11-03 02:10:39,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484401834] [2022-11-03 02:10:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:10:39,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:39,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484401834] [2022-11-03 02:10:39,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484401834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:39,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:39,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874581425] [2022-11-03 02:10:39,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:39,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:39,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:39,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:39,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:39,269 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:10:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:39,903 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-11-03 02:10:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-11-03 02:10:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:39,966 INFO L225 Difference]: With dead ends: 8675 [2022-11-03 02:10:39,966 INFO L226 Difference]: Without dead ends: 6657 [2022-11-03 02:10:39,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:39,976 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3482 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 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 [2022-11-03 02:10:39,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-11-03 02:10:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-11-03 02:10:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 02:10:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-11-03 02:10:40,294 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-11-03 02:10:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:40,295 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-11-03 02:10:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:10:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-11-03 02:10:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:10:40,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:40,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:40,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:10:40,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1660420407, now seen corresponding path program 1 times [2022-11-03 02:10:40,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127076548] [2022-11-03 02:10:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:10:40,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127076548] [2022-11-03 02:10:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127076548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:40,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034738298] [2022-11-03 02:10:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:40,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:40,427 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:41,159 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-11-03 02:10:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:10:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:41,196 INFO L225 Difference]: With dead ends: 15526 [2022-11-03 02:10:41,196 INFO L226 Difference]: Without dead ends: 10851 [2022-11-03 02:10:41,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:41,212 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:41,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-11-03 02:10:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-11-03 02:10:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-03 02:10:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-11-03 02:10:41,767 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-11-03 02:10:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:41,767 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-11-03 02:10:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-11-03 02:10:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:10:41,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:41,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:41,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:10:41,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:41,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2044633071, now seen corresponding path program 1 times [2022-11-03 02:10:41,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:41,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705727005] [2022-11-03 02:10:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:41,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:10:41,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:41,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705727005] [2022-11-03 02:10:41,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705727005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:41,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:41,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458923470] [2022-11-03 02:10:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:41,883 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:42,904 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-11-03 02:10:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:10:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:42,983 INFO L225 Difference]: With dead ends: 28822 [2022-11-03 02:10:42,983 INFO L226 Difference]: Without dead ends: 19667 [2022-11-03 02:10:43,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:43,182 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:43,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-11-03 02:10:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-11-03 02:10:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-03 02:10:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-11-03 02:10:44,002 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-11-03 02:10:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:44,003 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-11-03 02:10:44,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-11-03 02:10:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:10:44,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:44,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:44,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:10:44,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash -756606270, now seen corresponding path program 1 times [2022-11-03 02:10:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:44,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322548784] [2022-11-03 02:10:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:10:44,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322548784] [2022-11-03 02:10:44,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322548784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:44,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:44,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215489133] [2022-11-03 02:10:44,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:44,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:44,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:44,144 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:46,429 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-11-03 02:10:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:10:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:46,601 INFO L225 Difference]: With dead ends: 54838 [2022-11-03 02:10:46,601 INFO L226 Difference]: Without dead ends: 36915 [2022-11-03 02:10:46,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:46,683 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:46,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-11-03 02:10:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-11-03 02:10:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-03 02:10:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-11-03 02:10:48,509 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-11-03 02:10:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:48,510 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-11-03 02:10:48,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-11-03 02:10:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:10:48,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:48,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:10:48,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2085925580, now seen corresponding path program 1 times [2022-11-03 02:10:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781460490] [2022-11-03 02:10:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:10:48,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781460490] [2022-11-03 02:10:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781460490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:48,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:48,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485367201] [2022-11-03 02:10:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:48,712 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:52,106 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-11-03 02:10:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-11-03 02:10:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:52,415 INFO L225 Difference]: With dead ends: 105718 [2022-11-03 02:10:52,415 INFO L226 Difference]: Without dead ends: 70643 [2022-11-03 02:10:52,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:52,528 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:52,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-11-03 02:10:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-11-03 02:10:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-03 02:10:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-11-03 02:10:55,728 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-11-03 02:10:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:55,728 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-11-03 02:10:55,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:10:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-11-03 02:10:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:10:56,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:56,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:56,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:10:56,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash -929720823, now seen corresponding path program 1 times [2022-11-03 02:10:56,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070815454] [2022-11-03 02:10:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:10:56,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070815454] [2022-11-03 02:10:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070815454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923036088] [2022-11-03 02:10:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:56,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:56,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:56,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:56,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:10:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:10:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:10:57,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:57,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923036088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:57,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:10:57,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:10:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503601385] [2022-11-03 02:10:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:57,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:57,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:57,149 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:11:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:01,833 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-11-03 02:11:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-11-03 02:11:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:02,206 INFO L225 Difference]: With dead ends: 133109 [2022-11-03 02:11:02,206 INFO L226 Difference]: Without dead ends: 98035 [2022-11-03 02:11:02,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:02,285 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3483 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:02,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:11:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-11-03 02:11:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-11-03 02:11:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-03 02:11:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-11-03 02:11:06,739 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-11-03 02:11:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:06,741 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-11-03 02:11:06,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:11:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-11-03 02:11:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:11:07,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:07,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:07,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:07,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:11:07,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash -490917437, now seen corresponding path program 2 times [2022-11-03 02:11:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:07,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300982040] [2022-11-03 02:11:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:07,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:11:07,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300982040] [2022-11-03 02:11:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300982040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:07,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546160030] [2022-11-03 02:11:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:11:07,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:07,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:07,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:07,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:11:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:11:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:11:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:11:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:11:08,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:08,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546160030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:08,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:11:08,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:11:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122953042] [2022-11-03 02:11:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:08,171 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:11:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:12,036 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-11-03 02:11:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-11-03 02:11:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:12,331 INFO L225 Difference]: With dead ends: 135285 [2022-11-03 02:11:12,332 INFO L226 Difference]: Without dead ends: 85363 [2022-11-03 02:11:12,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:12,415 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:12,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:11:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-11-03 02:11:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-11-03 02:11:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-03 02:11:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-11-03 02:11:16,070 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-11-03 02:11:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:16,071 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-11-03 02:11:16,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:11:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions. [2022-11-03 02:11:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:11:16,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:16,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:16,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:11:16,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:16,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash 25723333, now seen corresponding path program 1 times [2022-11-03 02:11:16,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470102805] [2022-11-03 02:11:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:11:17,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470102805] [2022-11-03 02:11:17,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470102805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968313182] [2022-11-03 02:11:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:17,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:17,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:17,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5303907d-c116-4123-a82e-bafef026022a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:11:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:11:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:11:17,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968313182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:17,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:11:17,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:11:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241084070] [2022-11-03 02:11:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:17,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:17,397 INFO L87 Difference]: Start difference. First operand 84849 states and 126159 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)