./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/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_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/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_044532e3-8311-46f0-95e1-f201fdb3daa4/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 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- 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 02:25:43,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:43,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:43,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:43,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:44,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:44,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:44,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:44,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:44,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:44,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:44,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:44,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:44,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:44,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:44,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:44,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:44,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:44,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:44,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:44,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:44,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:44,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:44,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:44,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:44,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:44,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:44,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:44,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:44,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:44,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:44,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:44,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:44,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:44,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:44,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:44,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:44,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:44,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:44,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:44,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:44,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:25:44,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:44,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:44,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:44,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:44,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:44,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:44,103 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:44,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:44,104 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:44,104 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:25:44,105 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:44,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:44,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:25:44,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:25:44,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:44,106 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:25:44,106 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:25:44,107 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:25:44,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:44,107 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:44,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:25:44,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:44,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:44,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:44,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:44,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:44,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:44,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:44,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:44,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:44,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:44,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:44,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:44,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:44,111 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:25:44,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:44,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:44,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:25:44,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:25:44,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:44,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:44,112 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_044532e3-8311-46f0-95e1-f201fdb3daa4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2022-11-03 02:25:44,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:44,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:44,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:44,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:44,392 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:44,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-03 02:25:44,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/data/09ef80e8b/69c6090d66b54aebafbd0dcf66f909b9/FLAG968d5a26f [2022-11-03 02:25:45,184 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:45,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-03 02:25:45,205 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/data/09ef80e8b/69c6090d66b54aebafbd0dcf66f909b9/FLAG968d5a26f [2022-11-03 02:25:45,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/data/09ef80e8b/69c6090d66b54aebafbd0dcf66f909b9 [2022-11-03 02:25:45,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:45,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:45,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:45,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:45,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:45,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:45" (1/1) ... [2022-11-03 02:25:45,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33744a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:45, skipping insertion in model container [2022-11-03 02:25:45,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:45" (1/1) ... [2022-11-03 02:25:45,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:45,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:45,875 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_044532e3-8311-46f0-95e1-f201fdb3daa4/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-03 02:25:46,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:46,084 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:46,180 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_044532e3-8311-46f0-95e1-f201fdb3daa4/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-03 02:25:46,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:46,295 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:46,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46 WrapperNode [2022-11-03 02:25:46,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:46,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:46,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:46,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:46,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,409 INFO L138 Inliner]: procedures = 91, calls = 331, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 805 [2022-11-03 02:25:46,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:46,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:46,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:46,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:46,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:46,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:46,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:46,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:46,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (1/1) ... [2022-11-03 02:25:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:46,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:25:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:25:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:25:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:25:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:25:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:25:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:25:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:25:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:25:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:25:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:25:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:25:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:25:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:25:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:25:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:25:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:25:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:25:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:25:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:25:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:25:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:25:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:25:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:25:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:25:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:25:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:25:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:25:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:25:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:25:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:25:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:25:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-03 02:25:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-03 02:25:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:25:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:25:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:25:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:25:46,576 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:25:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:25:46,576 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:25:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:25:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:25:46,772 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:46,774 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:25:48,136 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:25:48,968 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:25:48,968 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:25:48,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:48 BoogieIcfgContainer [2022-11-03 02:25:48,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:25:48,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:25:48,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:25:48,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:25:48,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:45" (1/3) ... [2022-11-03 02:25:48,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c40cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:48, skipping insertion in model container [2022-11-03 02:25:48,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:46" (2/3) ... [2022-11-03 02:25:48,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c40cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:48, skipping insertion in model container [2022-11-03 02:25:48,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:48" (3/3) ... [2022-11-03 02:25:48,984 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2022-11-03 02:25:49,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:25:49,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:25:49,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:25:49,097 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;@6da6d472, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:25:49,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:25:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-11-03 02:25:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:25:49,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:49,135 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] [2022-11-03 02:25:49,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336334, now seen corresponding path program 1 times [2022-11-03 02:25:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:49,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41741765] [2022-11-03 02:25:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:49,627 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 02:25:49,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:49,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41741765] [2022-11-03 02:25:49,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41741765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:49,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:49,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:25:49,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164931140] [2022-11-03 02:25:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:25:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:25:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:25:49,679 INFO L87 Difference]: Start difference. First operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:25:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:49,882 INFO L93 Difference]: Finished difference Result 356 states and 570 transitions. [2022-11-03 02:25:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:25:49,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-03 02:25:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:49,900 INFO L225 Difference]: With dead ends: 356 [2022-11-03 02:25:49,901 INFO L226 Difference]: Without dead ends: 334 [2022-11-03 02:25:49,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:25:49,907 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:49,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 499 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-03 02:25:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-11-03 02:25:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 247 states have internal predecessors, (367), 85 states have call successors, (85), 21 states have call predecessors, (85), 20 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-03 02:25:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 532 transitions. [2022-11-03 02:25:50,033 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 532 transitions. Word has length 51 [2022-11-03 02:25:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:50,038 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 532 transitions. [2022-11-03 02:25:50,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:25:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 532 transitions. [2022-11-03 02:25:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:25:50,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:50,043 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] [2022-11-03 02:25:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:50,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1772609343, now seen corresponding path program 1 times [2022-11-03 02:25:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:50,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449500960] [2022-11-03 02:25:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:50,414 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 02:25:50,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449500960] [2022-11-03 02:25:50,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449500960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:50,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:50,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:25:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518456585] [2022-11-03 02:25:50,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:25:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:25:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:50,421 INFO L87 Difference]: Start difference. First operand 334 states and 532 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 02:25:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:53,012 INFO L93 Difference]: Finished difference Result 1111 states and 1803 transitions. [2022-11-03 02:25:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:25:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-03 02:25:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:53,020 INFO L225 Difference]: With dead ends: 1111 [2022-11-03 02:25:53,020 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 02:25:53,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:25:53,031 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 1584 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1639 Valid, 1774 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:25:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 02:25:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-03 02:25:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 536 states have (on average 1.6399253731343284) internal successors, (879), 571 states have internal predecessors, (879), 175 states have call successors, (175), 41 states have call predecessors, (175), 43 states have return successors, (176), 167 states have call predecessors, (176), 170 states have call successors, (176) [2022-11-03 02:25:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1230 transitions. [2022-11-03 02:25:53,116 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1230 transitions. Word has length 52 [2022-11-03 02:25:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:53,117 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1230 transitions. [2022-11-03 02:25:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 02:25:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1230 transitions. [2022-11-03 02:25:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:25:53,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:53,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:53,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:53,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash -292034412, now seen corresponding path program 1 times [2022-11-03 02:25:53,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:53,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116490409] [2022-11-03 02:25:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:53,328 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 02:25:53,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:53,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116490409] [2022-11-03 02:25:53,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116490409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:53,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:53,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:25:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488097460] [2022-11-03 02:25:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:25:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:25:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:53,333 INFO L87 Difference]: Start difference. First operand 755 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:25:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:53,566 INFO L93 Difference]: Finished difference Result 1249 states and 2039 transitions. [2022-11-03 02:25:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:25:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-03 02:25:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:53,572 INFO L225 Difference]: With dead ends: 1249 [2022-11-03 02:25:53,572 INFO L226 Difference]: Without dead ends: 803 [2022-11-03 02:25:53,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:53,582 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 30 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:53,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2021 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-03 02:25:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 767. [2022-11-03 02:25:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 545 states have (on average 1.6293577981651377) internal successors, (888), 580 states have internal predecessors, (888), 175 states have call successors, (175), 41 states have call predecessors, (175), 46 states have return successors, (182), 170 states have call predecessors, (182), 170 states have call successors, (182) [2022-11-03 02:25:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1245 transitions. [2022-11-03 02:25:53,649 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1245 transitions. Word has length 56 [2022-11-03 02:25:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:53,651 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1245 transitions. [2022-11-03 02:25:53,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:25:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1245 transitions. [2022-11-03 02:25:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:25:53,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:53,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:25:53,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 323491644, now seen corresponding path program 1 times [2022-11-03 02:25:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:53,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009045067] [2022-11-03 02:25:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:54,050 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 02:25:54,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009045067] [2022-11-03 02:25:54,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009045067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:54,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:54,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:25:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15191709] [2022-11-03 02:25:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:25:54,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:25:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:54,053 INFO L87 Difference]: Start difference. First operand 767 states and 1245 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:25:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:56,275 INFO L93 Difference]: Finished difference Result 1713 states and 2771 transitions. [2022-11-03 02:25:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:25:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-03 02:25:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:56,284 INFO L225 Difference]: With dead ends: 1713 [2022-11-03 02:25:56,285 INFO L226 Difference]: Without dead ends: 1159 [2022-11-03 02:25:56,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:25:56,289 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 2025 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2157 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:56,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2157 Valid, 1326 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:25:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-03 02:25:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1087. [2022-11-03 02:25:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.5821287779237845) internal successors, (1204), 813 states have internal predecessors, (1204), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-03 02:25:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1724 transitions. [2022-11-03 02:25:56,387 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1724 transitions. Word has length 60 [2022-11-03 02:25:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:56,388 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1724 transitions. [2022-11-03 02:25:56,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 02:25:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1724 transitions. [2022-11-03 02:25:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:25:56,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:56,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:25:56,392 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1760328155, now seen corresponding path program 1 times [2022-11-03 02:25:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732246595] [2022-11-03 02:25:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:56,537 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 02:25:56,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732246595] [2022-11-03 02:25:56,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732246595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:56,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:56,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:25:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467613147] [2022-11-03 02:25:56,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:25:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:25:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:25:56,542 INFO L87 Difference]: Start difference. First operand 1087 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:25:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:56,791 INFO L93 Difference]: Finished difference Result 2105 states and 3396 transitions. [2022-11-03 02:25:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:25:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-03 02:25:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:56,800 INFO L225 Difference]: With dead ends: 2105 [2022-11-03 02:25:56,800 INFO L226 Difference]: Without dead ends: 1087 [2022-11-03 02:25:56,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:56,809 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 210 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:56,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1338 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-11-03 02:25:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2022-11-03 02:25:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.540078843626807) internal successors, (1172), 813 states have internal predecessors, (1172), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-03 02:25:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1692 transitions. [2022-11-03 02:25:56,912 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1692 transitions. Word has length 63 [2022-11-03 02:25:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:56,912 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1692 transitions. [2022-11-03 02:25:56,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:25:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1692 transitions. [2022-11-03 02:25:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:25:56,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:56,916 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:25:56,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -670883309, now seen corresponding path program 1 times [2022-11-03 02:25:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:56,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159656092] [2022-11-03 02:25:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:25:57,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159656092] [2022-11-03 02:25:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159656092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:57,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:25:57,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313177034] [2022-11-03 02:25:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:25:57,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:25:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:25:57,219 INFO L87 Difference]: Start difference. First operand 1087 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:25:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:59,134 INFO L93 Difference]: Finished difference Result 2037 states and 3179 transitions. [2022-11-03 02:25:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:25:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-03 02:25:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:59,143 INFO L225 Difference]: With dead ends: 2037 [2022-11-03 02:25:59,143 INFO L226 Difference]: Without dead ends: 1220 [2022-11-03 02:25:59,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:25:59,147 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 865 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:59,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 1489 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:25:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-03 02:25:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1114. [2022-11-03 02:25:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 779 states have (on average 1.532734274711168) internal successors, (1194), 835 states have internal predecessors, (1194), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-03 02:25:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1726 transitions. [2022-11-03 02:25:59,223 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1726 transitions. Word has length 65 [2022-11-03 02:25:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:59,224 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1726 transitions. [2022-11-03 02:25:59,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:25:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1726 transitions. [2022-11-03 02:25:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:25:59,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:59,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:25:59,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 433843279, now seen corresponding path program 1 times [2022-11-03 02:25:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270406665] [2022-11-03 02:25:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:25:59,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270406665] [2022-11-03 02:25:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270406665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:59,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:59,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:25:59,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046035314] [2022-11-03 02:25:59,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:59,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:25:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:25:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:25:59,514 INFO L87 Difference]: Start difference. First operand 1114 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:25:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:59,974 INFO L93 Difference]: Finished difference Result 1186 states and 1839 transitions. [2022-11-03 02:25:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:25:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-03 02:25:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:59,985 INFO L225 Difference]: With dead ends: 1186 [2022-11-03 02:25:59,985 INFO L226 Difference]: Without dead ends: 1171 [2022-11-03 02:25:59,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:59,990 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 615 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:59,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1287 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:25:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-03 02:26:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1118. [2022-11-03 02:26:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5300127713920817) internal successors, (1198), 839 states have internal predecessors, (1198), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-03 02:26:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1730 transitions. [2022-11-03 02:26:00,076 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1730 transitions. Word has length 69 [2022-11-03 02:26:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:00,076 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1730 transitions. [2022-11-03 02:26:00,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:26:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1730 transitions. [2022-11-03 02:26:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:26:00,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:00,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:00,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:26:00,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1208809672, now seen corresponding path program 1 times [2022-11-03 02:26:00,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:00,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454719727] [2022-11-03 02:26:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:00,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:26:00,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:00,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454719727] [2022-11-03 02:26:00,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454719727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:00,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:00,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:26:00,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399878622] [2022-11-03 02:26:00,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:00,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:26:00,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:26:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:26:00,410 INFO L87 Difference]: Start difference. First operand 1118 states and 1730 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:26:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:00,704 INFO L93 Difference]: Finished difference Result 1137 states and 1754 transitions. [2022-11-03 02:26:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:26:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-03 02:26:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:00,712 INFO L225 Difference]: With dead ends: 1137 [2022-11-03 02:26:00,712 INFO L226 Difference]: Without dead ends: 1122 [2022-11-03 02:26:00,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:26:00,714 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 257 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:00,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2574 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-03 02:26:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1118. [2022-11-03 02:26:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5261813537675606) internal successors, (1195), 839 states have internal predecessors, (1195), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-03 02:26:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1727 transitions. [2022-11-03 02:26:00,815 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1727 transitions. Word has length 74 [2022-11-03 02:26:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:00,816 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1727 transitions. [2022-11-03 02:26:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:26:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1727 transitions. [2022-11-03 02:26:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:26:00,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:00,824 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:00,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:26:00,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash -687954906, now seen corresponding path program 1 times [2022-11-03 02:26:00,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:00,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490384334] [2022-11-03 02:26:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:00,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:26:00,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490384334] [2022-11-03 02:26:00,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490384334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:00,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:00,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101869628] [2022-11-03 02:26:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:00,938 INFO L87 Difference]: Start difference. First operand 1118 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:01,220 INFO L93 Difference]: Finished difference Result 3277 states and 5104 transitions. [2022-11-03 02:26:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-03 02:26:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:01,235 INFO L225 Difference]: With dead ends: 3277 [2022-11-03 02:26:01,235 INFO L226 Difference]: Without dead ends: 2175 [2022-11-03 02:26:01,240 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 02:26:01,242 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 477 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:01,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1058 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2022-11-03 02:26:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2134. [2022-11-03 02:26:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1523 states have (on average 1.5344714379514117) internal successors, (2337), 1631 states have internal predecessors, (2337), 457 states have call successors, (457), 129 states have call predecessors, (457), 153 states have return successors, (526), 429 states have call predecessors, (526), 452 states have call successors, (526) [2022-11-03 02:26:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3320 transitions. [2022-11-03 02:26:01,419 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3320 transitions. Word has length 81 [2022-11-03 02:26:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:01,421 INFO L495 AbstractCegarLoop]: Abstraction has 2134 states and 3320 transitions. [2022-11-03 02:26:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3320 transitions. [2022-11-03 02:26:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:26:01,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:01,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:26:01,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash 147821623, now seen corresponding path program 1 times [2022-11-03 02:26:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474686636] [2022-11-03 02:26:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:26:01,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474686636] [2022-11-03 02:26:01,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474686636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:01,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:01,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015687021] [2022-11-03 02:26:01,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:01,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:01,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:01,550 INFO L87 Difference]: Start difference. First operand 2134 states and 3320 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:01,923 INFO L93 Difference]: Finished difference Result 6324 states and 9926 transitions. [2022-11-03 02:26:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-03 02:26:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:01,952 INFO L225 Difference]: With dead ends: 6324 [2022-11-03 02:26:01,952 INFO L226 Difference]: Without dead ends: 4209 [2022-11-03 02:26:01,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:01,963 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 476 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:01,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1064 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2022-11-03 02:26:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 4167. [2022-11-03 02:26:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 3004 states have (on average 1.5369507323568574) internal successors, (4617), 3216 states have internal predecessors, (4617), 865 states have call successors, (865), 247 states have call predecessors, (865), 297 states have return successors, (1048), 797 states have call predecessors, (1048), 860 states have call successors, (1048) [2022-11-03 02:26:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 6530 transitions. [2022-11-03 02:26:02,309 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 6530 transitions. Word has length 82 [2022-11-03 02:26:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:02,309 INFO L495 AbstractCegarLoop]: Abstraction has 4167 states and 6530 transitions. [2022-11-03 02:26:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 6530 transitions. [2022-11-03 02:26:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:26:02,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:02,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:02,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:26:02,313 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:02,315 INFO L85 PathProgramCache]: Analyzing trace with hash -413319349, now seen corresponding path program 1 times [2022-11-03 02:26:02,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968027596] [2022-11-03 02:26:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:02,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:26:02,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968027596] [2022-11-03 02:26:02,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968027596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:02,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:02,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539639355] [2022-11-03 02:26:02,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:02,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:02,437 INFO L87 Difference]: Start difference. First operand 4167 states and 6530 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:26:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:03,155 INFO L93 Difference]: Finished difference Result 12419 states and 19701 transitions. [2022-11-03 02:26:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-03 02:26:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:03,206 INFO L225 Difference]: With dead ends: 12419 [2022-11-03 02:26:03,206 INFO L226 Difference]: Without dead ends: 8277 [2022-11-03 02:26:03,227 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 02:26:03,228 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 475 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:03,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1070 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-11-03 02:26:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8234. [2022-11-03 02:26:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8234 states, 5967 states have (on average 1.5362828892240656) internal successors, (9167), 6387 states have internal predecessors, (9167), 1681 states have call successors, (1681), 483 states have call predecessors, (1681), 585 states have return successors, (2194), 1533 states have call predecessors, (2194), 1676 states have call successors, (2194) [2022-11-03 02:26:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8234 states to 8234 states and 13042 transitions. [2022-11-03 02:26:03,920 INFO L78 Accepts]: Start accepts. Automaton has 8234 states and 13042 transitions. Word has length 86 [2022-11-03 02:26:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:03,920 INFO L495 AbstractCegarLoop]: Abstraction has 8234 states and 13042 transitions. [2022-11-03 02:26:03,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:26:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8234 states and 13042 transitions. [2022-11-03 02:26:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:26:03,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:03,924 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:26:03,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash 309579161, now seen corresponding path program 1 times [2022-11-03 02:26:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:03,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352273888] [2022-11-03 02:26:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:26:04,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352273888] [2022-11-03 02:26:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352273888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:04,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740094424] [2022-11-03 02:26:04,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:04,033 INFO L87 Difference]: Start difference. First operand 8234 states and 13042 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:05,318 INFO L93 Difference]: Finished difference Result 24610 states and 39746 transitions. [2022-11-03 02:26:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-11-03 02:26:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:05,475 INFO L225 Difference]: With dead ends: 24610 [2022-11-03 02:26:05,476 INFO L226 Difference]: Without dead ends: 16413 [2022-11-03 02:26:05,506 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 02:26:05,508 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 474 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:05,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1076 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2022-11-03 02:26:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 16369. [2022-11-03 02:26:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16369 states, 11894 states have (on average 1.5339667059021356) internal successors, (18245), 12730 states have internal predecessors, (18245), 3313 states have call successors, (3313), 955 states have call predecessors, (3313), 1161 states have return successors, (4864), 3005 states have call predecessors, (4864), 3308 states have call successors, (4864) [2022-11-03 02:26:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16369 states to 16369 states and 26422 transitions. [2022-11-03 02:26:06,739 INFO L78 Accepts]: Start accepts. Automaton has 16369 states and 26422 transitions. Word has length 84 [2022-11-03 02:26:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:06,740 INFO L495 AbstractCegarLoop]: Abstraction has 16369 states and 26422 transitions. [2022-11-03 02:26:06,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:26:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16369 states and 26422 transitions. [2022-11-03 02:26:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:26:06,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:06,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:06,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:26:06,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2075857939, now seen corresponding path program 1 times [2022-11-03 02:26:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:06,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723856962] [2022-11-03 02:26:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:26:06,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723856962] [2022-11-03 02:26:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723856962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:06,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:06,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271093671] [2022-11-03 02:26:06,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:06,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:06,845 INFO L87 Difference]: Start difference. First operand 16369 states and 26422 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:26:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:08,135 INFO L93 Difference]: Finished difference Result 17431 states and 28225 transitions. [2022-11-03 02:26:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-11-03 02:26:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:08,251 INFO L225 Difference]: With dead ends: 17431 [2022-11-03 02:26:08,251 INFO L226 Difference]: Without dead ends: 17420 [2022-11-03 02:26:08,263 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 02:26:08,265 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 460 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:08,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1074 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17420 states. [2022-11-03 02:26:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17420 to 17377. [2022-11-03 02:26:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 12627 states have (on average 1.5329056783083868) internal successors, (19356), 13515 states have internal predecessors, (19356), 3517 states have call successors, (3517), 1014 states have call predecessors, (3517), 1232 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-03 02:26:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 28148 transitions. [2022-11-03 02:26:09,678 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 28148 transitions. Word has length 88 [2022-11-03 02:26:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:09,679 INFO L495 AbstractCegarLoop]: Abstraction has 17377 states and 28148 transitions. [2022-11-03 02:26:09,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:26:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 28148 transitions. [2022-11-03 02:26:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:26:09,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:09,685 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:09,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:26:09,685 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1683573582, now seen corresponding path program 1 times [2022-11-03 02:26:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100181468] [2022-11-03 02:26:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:26:09,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100181468] [2022-11-03 02:26:09,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100181468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914449542] [2022-11-03 02:26:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:09,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:09,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:09,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:09,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:26:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:26:10,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:10,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914449542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:10,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:10,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:26:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807610901] [2022-11-03 02:26:10,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:10,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:10,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:10,315 INFO L87 Difference]: Start difference. First operand 17377 states and 28148 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:11,956 INFO L93 Difference]: Finished difference Result 36726 states and 61123 transitions. [2022-11-03 02:26:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 132 [2022-11-03 02:26:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:12,078 INFO L225 Difference]: With dead ends: 36726 [2022-11-03 02:26:12,078 INFO L226 Difference]: Without dead ends: 19366 [2022-11-03 02:26:12,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:26:12,309 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 213 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:12,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1233 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19366 states. [2022-11-03 02:26:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19366 to 19366. [2022-11-03 02:26:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19366 states, 14565 states have (on average 1.5845520082389288) internal successors, (23079), 15453 states have internal predecessors, (23079), 3517 states have call successors, (3517), 1065 states have call predecessors, (3517), 1283 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-03 02:26:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19366 states to 19366 states and 31871 transitions. [2022-11-03 02:26:13,689 INFO L78 Accepts]: Start accepts. Automaton has 19366 states and 31871 transitions. Word has length 132 [2022-11-03 02:26:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 19366 states and 31871 transitions. [2022-11-03 02:26:13,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 19366 states and 31871 transitions. [2022-11-03 02:26:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:26:13,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:13,699 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:13,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:13,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:26:13,914 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 435374254, now seen corresponding path program 1 times [2022-11-03 02:26:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497328895] [2022-11-03 02:26:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:26:15,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:15,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497328895] [2022-11-03 02:26:15,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497328895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:15,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657486367] [2022-11-03 02:26:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:15,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:15,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:26:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:26:16,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657486367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:16,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:16,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 02:26:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366595024] [2022-11-03 02:26:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:16,045 INFO L87 Difference]: Start difference. First operand 19366 states and 31871 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:17,557 INFO L93 Difference]: Finished difference Result 40704 states and 68518 transitions. [2022-11-03 02:26:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 137 [2022-11-03 02:26:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:17,778 INFO L225 Difference]: With dead ends: 40704 [2022-11-03 02:26:17,779 INFO L226 Difference]: Without dead ends: 21355 [2022-11-03 02:26:17,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:26:17,839 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 211 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:17,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1233 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21355 states. [2022-11-03 02:26:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21355 to 21355. [2022-11-03 02:26:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 16503 states have (on average 1.6240683512088712) internal successors, (26802), 17391 states have internal predecessors, (26802), 3517 states have call successors, (3517), 1116 states have call predecessors, (3517), 1334 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-03 02:26:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 35594 transitions. [2022-11-03 02:26:19,061 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 35594 transitions. Word has length 137 [2022-11-03 02:26:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:19,062 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 35594 transitions. [2022-11-03 02:26:19,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 35594 transitions. [2022-11-03 02:26:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:26:19,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:19,071 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:19,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:19,286 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1538670462, now seen corresponding path program 1 times [2022-11-03 02:26:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317712604] [2022-11-03 02:26:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:19,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:26:20,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317712604] [2022-11-03 02:26:20,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317712604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041488487] [2022-11-03 02:26:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:20,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:20,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:20,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:26:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:26:21,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:21,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041488487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:21,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:21,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 02:26:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764359477] [2022-11-03 02:26:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:21,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:21,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:21,348 INFO L87 Difference]: Start difference. First operand 21355 states and 35594 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:22,426 INFO L93 Difference]: Finished difference Result 44682 states and 75913 transitions. [2022-11-03 02:26:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:22,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 141 [2022-11-03 02:26:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:22,516 INFO L225 Difference]: With dead ends: 44682 [2022-11-03 02:26:22,517 INFO L226 Difference]: Without dead ends: 23344 [2022-11-03 02:26:22,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:26:22,575 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 209 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:22,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1233 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23344 states. [2022-11-03 02:26:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23344 to 23344. [2022-11-03 02:26:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23344 states, 18441 states have (on average 1.6552789978851472) internal successors, (30525), 19329 states have internal predecessors, (30525), 3517 states have call successors, (3517), 1167 states have call predecessors, (3517), 1385 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-03 02:26:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23344 states to 23344 states and 39317 transitions. [2022-11-03 02:26:23,922 INFO L78 Accepts]: Start accepts. Automaton has 23344 states and 39317 transitions. Word has length 141 [2022-11-03 02:26:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 23344 states and 39317 transitions. [2022-11-03 02:26:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23344 states and 39317 transitions. [2022-11-03 02:26:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:26:23,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:23,933 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:23,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:26:24,156 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1333081480, now seen corresponding path program 1 times [2022-11-03 02:26:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:24,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4418085] [2022-11-03 02:26:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:26:25,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4418085] [2022-11-03 02:26:25,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4418085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172691646] [2022-11-03 02:26:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:25,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:25,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:25,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:26:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:26:26,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:26,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172691646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:26,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:26,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 02:26:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775501695] [2022-11-03 02:26:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:26,130 INFO L87 Difference]: Start difference. First operand 23344 states and 39317 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:27,763 INFO L93 Difference]: Finished difference Result 48660 states and 83308 transitions. [2022-11-03 02:26:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 144 [2022-11-03 02:26:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:27,825 INFO L225 Difference]: With dead ends: 48660 [2022-11-03 02:26:27,825 INFO L226 Difference]: Without dead ends: 25333 [2022-11-03 02:26:27,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:26:27,868 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 207 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:27,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1233 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:26:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25333 states. [2022-11-03 02:26:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25333 to 25333. [2022-11-03 02:26:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25333 states, 20379 states have (on average 1.680553510967172) internal successors, (34248), 21267 states have internal predecessors, (34248), 3517 states have call successors, (3517), 1218 states have call predecessors, (3517), 1436 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-03 02:26:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25333 states to 25333 states and 43040 transitions. [2022-11-03 02:26:28,902 INFO L78 Accepts]: Start accepts. Automaton has 25333 states and 43040 transitions. Word has length 144 [2022-11-03 02:26:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:28,903 INFO L495 AbstractCegarLoop]: Abstraction has 25333 states and 43040 transitions. [2022-11-03 02:26:28,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:26:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 25333 states and 43040 transitions. [2022-11-03 02:26:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:26:28,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:28,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:28,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:29,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:26:29,118 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash 593862298, now seen corresponding path program 1 times [2022-11-03 02:26:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:29,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797238212] [2022-11-03 02:26:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:26:30,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:30,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797238212] [2022-11-03 02:26:30,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797238212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:30,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465465402] [2022-11-03 02:26:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:30,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:30,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:30,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:30,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:26:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:26:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:26:31,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:31,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465465402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:31,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:31,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 02:26:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873088725] [2022-11-03 02:26:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:31,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:31,069 INFO L87 Difference]: Start difference. First operand 25333 states and 43040 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:26:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:32,280 INFO L93 Difference]: Finished difference Result 52260 states and 89629 transitions. [2022-11-03 02:26:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-03 02:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:32,358 INFO L225 Difference]: With dead ends: 52260 [2022-11-03 02:26:32,358 INFO L226 Difference]: Without dead ends: 26989 [2022-11-03 02:26:32,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:26:32,401 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 289 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:32,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1335 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26989 states. [2022-11-03 02:26:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26989 to 26835. [2022-11-03 02:26:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26835 states, 21453 states have (on average 1.666014077285228) internal successors, (35741), 22344 states have internal predecessors, (35741), 3806 states have call successors, (3806), 1371 states have call predecessors, (3806), 1575 states have return successors, (6702), 3443 states have call predecessors, (6702), 3801 states have call successors, (6702) [2022-11-03 02:26:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26835 states to 26835 states and 46249 transitions. [2022-11-03 02:26:33,713 INFO L78 Accepts]: Start accepts. Automaton has 26835 states and 46249 transitions. Word has length 146 [2022-11-03 02:26:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:33,713 INFO L495 AbstractCegarLoop]: Abstraction has 26835 states and 46249 transitions. [2022-11-03 02:26:33,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:26:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 26835 states and 46249 transitions. [2022-11-03 02:26:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:26:33,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:33,721 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:33,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:26:33,946 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash 453761676, now seen corresponding path program 1 times [2022-11-03 02:26:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536607601] [2022-11-03 02:26:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:26:35,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536607601] [2022-11-03 02:26:35,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536607601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329132840] [2022-11-03 02:26:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:35,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:35,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:35,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:26:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:26:35,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:26:35,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:35,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329132840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:35,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:35,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2022-11-03 02:26:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803945936] [2022-11-03 02:26:35,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:26:35,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:26:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:26:35,889 INFO L87 Difference]: Start difference. First operand 26835 states and 46249 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:26:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:39,983 INFO L93 Difference]: Finished difference Result 63576 states and 111078 transitions. [2022-11-03 02:26:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:26:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) Word has length 149 [2022-11-03 02:26:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:40,243 INFO L225 Difference]: With dead ends: 63576 [2022-11-03 02:26:40,243 INFO L226 Difference]: Without dead ends: 36764 [2022-11-03 02:26:40,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:26:40,320 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 1033 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:40,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 1591 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2738 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:26:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36764 states. [2022-11-03 02:26:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36764 to 34500. [2022-11-03 02:26:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34500 states, 27677 states have (on average 1.6617769266900315) internal successors, (45993), 28867 states have internal predecessors, (45993), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-03 02:26:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34500 states to 34500 states and 58202 transitions. [2022-11-03 02:26:41,820 INFO L78 Accepts]: Start accepts. Automaton has 34500 states and 58202 transitions. Word has length 149 [2022-11-03 02:26:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:41,821 INFO L495 AbstractCegarLoop]: Abstraction has 34500 states and 58202 transitions. [2022-11-03 02:26:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:26:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states and 58202 transitions. [2022-11-03 02:26:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:26:41,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:41,827 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:26:41,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:42,054 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1960668456, now seen corresponding path program 1 times [2022-11-03 02:26:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422356315] [2022-11-03 02:26:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:26:43,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422356315] [2022-11-03 02:26:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422356315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:43,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62940410] [2022-11-03 02:26:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:43,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:43,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:26:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:43,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:26:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:26:44,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:44,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62940410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:44,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:44,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 02:26:44,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977233274] [2022-11-03 02:26:44,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:44,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:44,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:44,008 INFO L87 Difference]: Start difference. First operand 34500 states and 58202 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-03 02:26:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:45,254 INFO L93 Difference]: Finished difference Result 35385 states and 61385 transitions. [2022-11-03 02:26:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 149 [2022-11-03 02:26:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:45,414 INFO L225 Difference]: With dead ends: 35385 [2022-11-03 02:26:45,415 INFO L226 Difference]: Without dead ends: 35299 [2022-11-03 02:26:45,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:26:45,436 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 44 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:45,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1512 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35299 states. [2022-11-03 02:26:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35299 to 34632. [2022-11-03 02:26:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34632 states, 27809 states have (on average 1.658635693480528) internal successors, (46125), 28999 states have internal predecessors, (46125), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-03 02:26:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34632 states to 34632 states and 58334 transitions. [2022-11-03 02:26:46,945 INFO L78 Accepts]: Start accepts. Automaton has 34632 states and 58334 transitions. Word has length 149 [2022-11-03 02:26:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:46,945 INFO L495 AbstractCegarLoop]: Abstraction has 34632 states and 58334 transitions. [2022-11-03 02:26:46,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-03 02:26:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34632 states and 58334 transitions. [2022-11-03 02:26:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 02:26:46,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:46,951 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:46,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:47,152 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1522840532, now seen corresponding path program 1 times [2022-11-03 02:26:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:47,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357821290] [2022-11-03 02:26:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:26:48,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357821290] [2022-11-03 02:26:48,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357821290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:48,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035305959] [2022-11-03 02:26:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:48,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:48,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:48,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044532e3-8311-46f0-95e1-f201fdb3daa4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:26:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:26:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 02:26:49,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:52,915 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 02:26:58,994 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-03 02:26:59,351 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...