./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur --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 ead4d47009bf2f1ade65f6eacfdab211d65347e20b879f4822b8ceaab9ef42cd --- 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-38b53e6 [2022-11-26 00:11:21,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:11:21,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:11:21,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:11:21,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:11:21,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:11:21,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:11:21,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:11:21,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:11:21,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:11:21,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:11:21,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:11:21,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:11:21,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:11:21,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:11:21,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:11:21,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:11:21,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:11:21,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:11:21,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:11:21,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:11:21,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:11:21,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:11:21,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:11:21,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:11:21,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:11:21,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:11:21,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:11:21,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:11:21,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:11:21,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:11:21,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:11:21,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:11:21,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:11:21,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:11:21,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:11:21,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:11:21,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:11:21,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:11:21,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:11:21,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:11:21,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:11:21,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:11:21,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:11:21,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:11:21,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:11:21,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:11:21,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:11:21,485 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:11:21,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:11:21,485 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:11:21,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:11:21,486 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:11:21,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:11:21,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:11:21,487 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:11:21,487 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:11:21,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:11:21,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:11:21,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:11:21,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:11:21,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:11:21,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:11:21,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:11:21,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:11:21,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:11:21,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:11:21,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:11:21,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:11:21,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:11:21,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:11:21,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:11:21,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:11:21,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:11:21,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:11:21,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:11:21,493 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:11:21,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:11:21,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:11:21,493 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:11:21,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:11:21,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:11:21,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:11:21,494 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_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ead4d47009bf2f1ade65f6eacfdab211d65347e20b879f4822b8ceaab9ef42cd [2022-11-26 00:11:21,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:11:21,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:11:21,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:11:21,775 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:11:21,776 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:11:21,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c [2022-11-26 00:11:24,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:11:25,540 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:11:25,541 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c [2022-11-26 00:11:25,596 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/data/ddb8f2bf6/687cd536b999460f8d1adb8573f37f49/FLAG6c2e0ed08 [2022-11-26 00:11:25,616 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/data/ddb8f2bf6/687cd536b999460f8d1adb8573f37f49 [2022-11-26 00:11:25,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:11:25,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:11:25,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:11:25,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:11:25,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:11:25,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:11:25" (1/1) ... [2022-11-26 00:11:25,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7483e239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:25, skipping insertion in model container [2022-11-26 00:11:25,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:11:25" (1/1) ... [2022-11-26 00:11:25,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:11:25,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:11:28,262 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[380593,380606] [2022-11-26 00:11:28,295 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[383339,383352] [2022-11-26 00:11:28,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:11:28,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:11:29,848 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[380593,380606] [2022-11-26 00:11:29,855 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[383339,383352] [2022-11-26 00:11:29,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:11:29,977 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:11:29,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29 WrapperNode [2022-11-26 00:11:29,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:11:29,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:11:29,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:11:29,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:11:29,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,500 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-11-26 00:11:30,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:11:30,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:11:30,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:11:30,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:11:30,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:30,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:31,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:11:31,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:11:31,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:11:31,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:11:31,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (1/1) ... [2022-11-26 00:11:31,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:11:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:31,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:11:31,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:11:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:11:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:11:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:11:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 00:11:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 00:11:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:11:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:11:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:11:31,321 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:11:31,323 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:11:40,899 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:11:43,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:11:43,849 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-26 00:11:43,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:11:43 BoogieIcfgContainer [2022-11-26 00:11:43,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:11:43,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:11:43,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:11:43,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:11:43,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:11:25" (1/3) ... [2022-11-26 00:11:43,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5e4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:11:43, skipping insertion in model container [2022-11-26 00:11:43,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:11:29" (2/3) ... [2022-11-26 00:11:43,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5e4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:11:43, skipping insertion in model container [2022-11-26 00:11:43,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:11:43" (3/3) ... [2022-11-26 00:11:43,865 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-2.c [2022-11-26 00:11:43,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:11:43,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:11:44,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:11:44,018 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;@17c2f073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:11:44,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:11:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-26 00:11:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:11:44,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:44,051 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] [2022-11-26 00:11:44,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash -833195934, now seen corresponding path program 1 times [2022-11-26 00:11:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703049681] [2022-11-26 00:11:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:44,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703049681] [2022-11-26 00:11:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703049681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:44,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:11:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:11:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750948922] [2022-11-26 00:11:44,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:11:44,594 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:11:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:45,701 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-11-26 00:11:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:11:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-11-26 00:11:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:45,730 INFO L225 Difference]: With dead ends: 3767 [2022-11-26 00:11:45,730 INFO L226 Difference]: Without dead ends: 1957 [2022-11-26 00:11:45,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:11:45,747 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:11:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-26 00:11:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-11-26 00:11:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-26 00:11:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-11-26 00:11:45,920 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-11-26 00:11:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:45,922 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-11-26 00:11:45,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:11:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-11-26 00:11:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:45,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:45,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:11:45,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1498007888, now seen corresponding path program 1 times [2022-11-26 00:11:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57995271] [2022-11-26 00:11:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:11:46,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:46,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57995271] [2022-11-26 00:11:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57995271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:46,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581295454] [2022-11-26 00:11:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:46,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:46,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:46,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:46,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:11:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:11:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:11:46,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:46,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581295454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:46,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:46,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:11:46,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829907273] [2022-11-26 00:11:46,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:11:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:11:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:46,726 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:47,362 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-11-26 00:11:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:11:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-26 00:11:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:47,375 INFO L225 Difference]: With dead ends: 2569 [2022-11-26 00:11:47,375 INFO L226 Difference]: Without dead ends: 2259 [2022-11-26 00:11:47,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:47,379 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:47,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:11:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-11-26 00:11:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-11-26 00:11:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-26 00:11:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-11-26 00:11:47,549 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-11-26 00:11:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:47,549 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-11-26 00:11:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-11-26 00:11:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:47,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:47,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:47,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:47,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:47,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 765495568, now seen corresponding path program 1 times [2022-11-26 00:11:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659110788] [2022-11-26 00:11:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:11:47,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:47,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659110788] [2022-11-26 00:11:47,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659110788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:47,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348792202] [2022-11-26 00:11:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:47,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:47,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:47,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:47,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:11:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:11:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:11:48,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:48,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348792202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:48,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:48,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:11:48,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562677142] [2022-11-26 00:11:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:48,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:11:48,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:11:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:48,291 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:48,921 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-11-26 00:11:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:11:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-26 00:11:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:48,936 INFO L225 Difference]: With dead ends: 3460 [2022-11-26 00:11:48,937 INFO L226 Difference]: Without dead ends: 2851 [2022-11-26 00:11:48,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:48,941 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:48,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:11:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-11-26 00:11:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-11-26 00:11:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-26 00:11:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-11-26 00:11:49,055 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-11-26 00:11:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:49,056 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-11-26 00:11:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-11-26 00:11:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:49,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:49,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:49,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:49,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash 247614320, now seen corresponding path program 1 times [2022-11-26 00:11:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:49,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074231248] [2022-11-26 00:11:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:11:49,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074231248] [2022-11-26 00:11:49,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074231248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98686792] [2022-11-26 00:11:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:49,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:49,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:49,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:49,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:11:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:11:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:11:49,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98686792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:49,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:11:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810352179] [2022-11-26 00:11:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:49,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:11:49,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:11:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:49,796 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:50,377 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-11-26 00:11:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:11:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-26 00:11:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:50,399 INFO L225 Difference]: With dead ends: 5218 [2022-11-26 00:11:50,400 INFO L226 Difference]: Without dead ends: 4019 [2022-11-26 00:11:50,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:50,407 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:50,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:11:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-11-26 00:11:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-11-26 00:11:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-26 00:11:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-11-26 00:11:50,570 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-11-26 00:11:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:50,571 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-11-26 00:11:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-11-26 00:11:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:50,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:50,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:50,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:50,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-26 00:11:50,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 576767440, now seen corresponding path program 1 times [2022-11-26 00:11:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:50,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400190063] [2022-11-26 00:11:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:11:50,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400190063] [2022-11-26 00:11:50,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400190063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750910846] [2022-11-26 00:11:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:50,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:50,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:50,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:11:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:11:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:11:51,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:51,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750910846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:51,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:51,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:11:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232442426] [2022-11-26 00:11:51,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:11:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:11:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:51,268 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:52,206 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-11-26 00:11:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:11:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-26 00:11:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:52,244 INFO L225 Difference]: With dead ends: 8686 [2022-11-26 00:11:52,244 INFO L226 Difference]: Without dead ends: 6323 [2022-11-26 00:11:52,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:52,262 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:52,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:11:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-11-26 00:11:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-11-26 00:11:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-26 00:11:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-11-26 00:11:52,640 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-11-26 00:11:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:52,641 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-11-26 00:11:52,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-11-26 00:11:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:52,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:52,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:52,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:52,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:52,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:52,862 INFO L85 PathProgramCache]: Analyzing trace with hash 967028592, now seen corresponding path program 1 times [2022-11-26 00:11:52,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:52,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974079402] [2022-11-26 00:11:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:52,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:11:53,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974079402] [2022-11-26 00:11:53,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974079402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:53,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942025809] [2022-11-26 00:11:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:53,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:53,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:53,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:11:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:53,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:11:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:11:53,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942025809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:53,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:53,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:11:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856950987] [2022-11-26 00:11:53,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:11:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:11:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:53,402 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:54,378 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-11-26 00:11:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:11:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-26 00:11:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:54,462 INFO L225 Difference]: With dead ends: 15526 [2022-11-26 00:11:54,463 INFO L226 Difference]: Without dead ends: 10867 [2022-11-26 00:11:54,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:54,490 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:54,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:11:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-11-26 00:11:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-11-26 00:11:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-26 00:11:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-11-26 00:11:55,282 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-11-26 00:11:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:55,282 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-11-26 00:11:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:11:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-11-26 00:11:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:11:55,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:55,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:55,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27eb973-7011-4e3c-b2cf-26e17e994723/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:55,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash -27346480, now seen corresponding path program 1 times [2022-11-26 00:11:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:55,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555427133] [2022-11-26 00:11:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:55,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:11:56,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:56,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555427133] [2022-11-26 00:11:56,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555427133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:56,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:11:56,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:11:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967682854] [2022-11-26 00:11:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:56,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:11:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:11:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:56,140 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:11:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:58,220 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-11-26 00:11:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:11:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-26 00:11:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:58,307 INFO L225 Difference]: With dead ends: 26597 [2022-11-26 00:11:58,307 INFO L226 Difference]: Without dead ends: 17411 [2022-11-26 00:11:58,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:11:58,350 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4031 mSDsluCounter, 9794 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4037 SdHoareTripleChecker+Valid, 13094 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:58,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4037 Valid, 13094 Invalid, 1340 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:11:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-11-26 00:11:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-11-26 00:11:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-26 00:11:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-11-26 00:11:59,395 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-11-26 00:11:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:59,395 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-11-26 00:11:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:11:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-11-26 00:11:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:11:59,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:59,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:59,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:11:59,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 778373023, now seen corresponding path program 1 times [2022-11-26 00:11:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:59,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782671798] [2022-11-26 00:11:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:12:00,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:00,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782671798] [2022-11-26 00:12:00,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782671798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:00,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:00,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:12:00,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688513326] [2022-11-26 00:12:00,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:00,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:12:00,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:12:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:12:00,116 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:12:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:03,015 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-11-26 00:12:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:12:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-26 00:12:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:03,115 INFO L225 Difference]: With dead ends: 36973 [2022-11-26 00:12:03,116 INFO L226 Difference]: Without dead ends: 23323 [2022-11-26 00:12:03,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:12:03,157 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3977 mSDsluCounter, 9680 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3983 SdHoareTripleChecker+Valid, 12952 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:03,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3983 Valid, 12952 Invalid, 1322 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:12:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-11-26 00:12:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-11-26 00:12:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-11-26 00:12:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-11-26 00:12:04,743 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-11-26 00:12:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:04,745 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-11-26 00:12:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:12:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-11-26 00:12:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 00:12:04,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:04,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:12:04,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -901284940, now seen corresponding path program 1 times [2022-11-26 00:12:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291893041] [2022-11-26 00:12:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:12:05,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:05,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291893041] [2022-11-26 00:12:05,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291893041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:05,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:05,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:12:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781512693] [2022-11-26 00:12:05,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:12:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:12:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:12:05,508 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:12:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:09,616 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-11-26 00:12:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:12:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-26 00:12:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:09,880 INFO L225 Difference]: With dead ends: 72237 [2022-11-26 00:12:09,881 INFO L226 Difference]: Without dead ends: 51955 [2022-11-26 00:12:09,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:12:09,943 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 4219 mSDsluCounter, 6504 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4238 SdHoareTripleChecker+Valid, 9786 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:09,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4238 Valid, 9786 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:12:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-11-26 00:12:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-11-26 00:12:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-26 00:12:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-11-26 00:12:13,184 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-11-26 00:12:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:13,184 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-11-26 00:12:13,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:12:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-11-26 00:12:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:12:13,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:13,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:13,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:12:13,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1833961287, now seen corresponding path program 1 times [2022-11-26 00:12:13,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180300168] [2022-11-26 00:12:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:12:14,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180300168] [2022-11-26 00:12:14,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180300168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:14,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:14,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:12:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715009318] [2022-11-26 00:12:14,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:12:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:12:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:12:14,003 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:12:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:19,953 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-11-26 00:12:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:12:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-26 00:12:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:20,246 INFO L225 Difference]: With dead ends: 108861 [2022-11-26 00:12:20,246 INFO L226 Difference]: Without dead ends: 69163 [2022-11-26 00:12:20,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:12:20,340 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4040 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 13012 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:20,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4046 Valid, 13012 Invalid, 1334 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:12:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-11-26 00:12:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-11-26 00:12:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132)