./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.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_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/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_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/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_de7ee8cb-09f9-4f07-be94-e487661275c3/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 397165505e22c94185c98ac889a4a39846b9e873d477057714c221ff936752e7 --- 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 [2022-11-25 23:16:31,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:16:31,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:16:31,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:16:31,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:16:31,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:16:31,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:16:31,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:16:31,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:16:31,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:16:31,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:16:31,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:16:31,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:16:31,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:16:31,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:16:31,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:16:31,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:16:31,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:16:31,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:16:31,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:16:31,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:16:31,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:16:31,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:16:31,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:16:31,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:16:31,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:16:31,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:16:31,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:16:31,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:16:31,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:16:31,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:16:31,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:16:31,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:16:31,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:16:31,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:16:31,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:16:31,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:16:31,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:16:31,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:16:31,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:16:31,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:16:31,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:16:31,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:16:31,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:16:31,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:16:31,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:16:31,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:16:31,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:16:31,465 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:16:31,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:16:31,465 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:16:31,465 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:16:31,466 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:16:31,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:16:31,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:16:31,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:16:31,467 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:16:31,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:16:31,469 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:16:31,469 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:16:31,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:16:31,470 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:16:31,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:16:31,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:16:31,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:16:31,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:16:31,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:16:31,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:16:31,472 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:16:31,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:16:31,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:16:31,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:16:31,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:16:31,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:16:31,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:16:31,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:16:31,474 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:16:31,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:16:31,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:16:31,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:16:31,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:16:31,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:16:31,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:16:31,478 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_de7ee8cb-09f9-4f07-be94-e487661275c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 397165505e22c94185c98ac889a4a39846b9e873d477057714c221ff936752e7 [2022-11-25 23:16:31,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:16:31,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:16:31,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:16:31,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:16:31,831 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:16:31,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c [2022-11-25 23:16:34,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:16:35,937 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:16:35,938 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c [2022-11-25 23:16:36,009 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/data/3ec93a95e/202df67f8b9f4d589e01dc4423cf1572/FLAGfa29708a6 [2022-11-25 23:16:36,030 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/data/3ec93a95e/202df67f8b9f4d589e01dc4423cf1572 [2022-11-25 23:16:36,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:16:36,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:16:36,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:16:36,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:16:36,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:16:36,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:16:36" (1/1) ... [2022-11-25 23:16:36,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289a7b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:36, skipping insertion in model container [2022-11-25 23:16:36,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:16:36" (1/1) ... [2022-11-25 23:16:36,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:16:36,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:16:38,879 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_de7ee8cb-09f9-4f07-be94-e487661275c3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[381679,381692] [2022-11-25 23:16:38,911 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_de7ee8cb-09f9-4f07-be94-e487661275c3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[383339,383352] [2022-11-25 23:16:39,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:16:39,203 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:16:40,455 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_de7ee8cb-09f9-4f07-be94-e487661275c3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[381679,381692] [2022-11-25 23:16:40,459 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_de7ee8cb-09f9-4f07-be94-e487661275c3/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[383339,383352] [2022-11-25 23:16:40,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:16:40,536 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:16:40,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40 WrapperNode [2022-11-25 23:16:40,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:16:40,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:16:40,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:16:40,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:16:40,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:40,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,041 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-11-25 23:16:41,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:16:41,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:16:41,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:16:41,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:16:41,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:16:41,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:16:41,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:16:41,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:16:41,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (1/1) ... [2022-11-25 23:16:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:16:41,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:41,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:16:41,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:16:41,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:16:41,997 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 23:16:41,997 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 23:16:41,997 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 23:16:41,997 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 23:16:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 23:16:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 23:16:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 23:16:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 23:16:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 23:16:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 23:16:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 23:16:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 23:16:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:16:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:16:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:16:42,153 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:16:42,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:16:52,004 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:16:54,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:16:54,457 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-25 23:16:54,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:16:54 BoogieIcfgContainer [2022-11-25 23:16:54,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:16:54,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:16:54,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:16:54,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:16:54,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:16:36" (1/3) ... [2022-11-25 23:16:54,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8f10a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:16:54, skipping insertion in model container [2022-11-25 23:16:54,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:40" (2/3) ... [2022-11-25 23:16:54,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8f10a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:16:54, skipping insertion in model container [2022-11-25 23:16:54,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:16:54" (3/3) ... [2022-11-25 23:16:54,473 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.05.cil-1.c [2022-11-25 23:16:54,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:16:54,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:16:54,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:16:54,585 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;@283ffa32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:16:54,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:16:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 23:16:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:16:54,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:54,609 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] [2022-11-25 23:16:54,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:54,615 INFO L85 PathProgramCache]: Analyzing trace with hash 758554466, now seen corresponding path program 1 times [2022-11-25 23:16:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:54,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543589692] [2022-11-25 23:16:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:55,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543589692] [2022-11-25 23:16:55,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543589692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:55,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:16:55,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:16:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237972290] [2022-11-25 23:16:55,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:16:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:16:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:16:55,186 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-25 23:16:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:56,404 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-11-25 23:16:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:16:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2022-11-25 23:16:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:56,427 INFO L225 Difference]: With dead ends: 3602 [2022-11-25 23:16:56,428 INFO L226 Difference]: Without dead ends: 1847 [2022-11-25 23:16:56,438 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 [2022-11-25 23:16:56,441 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:56,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:16:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-25 23:16:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-11-25 23:16:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-25 23:16:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-11-25 23:16:56,563 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-11-25 23:16:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:56,563 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-11-25 23:16:56,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-25 23:16:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-11-25 23:16:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:16:56,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:56,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:16:56,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1152080392, now seen corresponding path program 1 times [2022-11-25 23:16:56,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:56,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83292014] [2022-11-25 23:16:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:16:56,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83292014] [2022-11-25 23:16:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83292014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:16:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575773631] [2022-11-25 23:16:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:56,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:56,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:16:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:16:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:16:57,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:57,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575773631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:57,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:16:57,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:16:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391066127] [2022-11-25 23:16:57,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:16:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:16:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:57,194 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2022-11-25 23:16:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:57,712 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-11-25 23:16:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:16:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 87 [2022-11-25 23:16:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:57,724 INFO L225 Difference]: With dead ends: 2239 [2022-11-25 23:16:57,724 INFO L226 Difference]: Without dead ends: 2039 [2022-11-25 23:16:57,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:57,727 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:57,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:16:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-11-25 23:16:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-11-25 23:16:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-25 23:16:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-11-25 23:16:57,794 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-11-25 23:16:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:57,795 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-11-25 23:16:57,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2022-11-25 23:16:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-11-25 23:16:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:16:57,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:57,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:57,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:16:58,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:58,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2113815034, now seen corresponding path program 1 times [2022-11-25 23:16:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115898166] [2022-11-25 23:16:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:58,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:16:58,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:58,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115898166] [2022-11-25 23:16:58,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115898166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:16:58,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164397180] [2022-11-25 23:16:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:58,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:58,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:58,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:16:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:16:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:16:58,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164397180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:58,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:16:58,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:16:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389316952] [2022-11-25 23:16:58,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:58,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:16:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:16:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:58,386 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2022-11-25 23:16:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:59,034 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-11-25 23:16:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:16:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 87 [2022-11-25 23:16:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:59,049 INFO L225 Difference]: With dead ends: 2800 [2022-11-25 23:16:59,049 INFO L226 Difference]: Without dead ends: 2411 [2022-11-25 23:16:59,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:59,053 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:59,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:16:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-11-25 23:16:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-11-25 23:16:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 23:16:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-11-25 23:16:59,140 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-11-25 23:16:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:59,141 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-11-25 23:16:59,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2022-11-25 23:16:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-11-25 23:16:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:16:59,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:59,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:59,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:16:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:59,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1391921208, now seen corresponding path program 1 times [2022-11-25 23:16:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:59,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307469108] [2022-11-25 23:16:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:16:59,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307469108] [2022-11-25 23:16:59,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307469108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:16:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311084257] [2022-11-25 23:16:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:59,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:16:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:16:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:16:59,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311084257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:59,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:16:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:16:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8476655] [2022-11-25 23:16:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:16:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:16:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:59,696 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-25 23:17:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:00,302 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-11-25 23:17:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-11-25 23:17:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:00,319 INFO L225 Difference]: With dead ends: 3898 [2022-11-25 23:17:00,319 INFO L226 Difference]: Without dead ends: 3139 [2022-11-25 23:17:00,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:17:00,324 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3399 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:00,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:17:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-11-25 23:17:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-11-25 23:17:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-25 23:17:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-11-25 23:17:00,551 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-11-25 23:17:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-11-25 23:17:00,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-25 23:17:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-11-25 23:17:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:17:00,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:00,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:00,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:00,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1757944506, now seen corresponding path program 1 times [2022-11-25 23:17:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132258147] [2022-11-25 23:17:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:17:00,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132258147] [2022-11-25 23:17:00,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132258147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:00,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:17:00,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:17:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533718949] [2022-11-25 23:17:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:00,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:00,875 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:17:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:01,473 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-11-25 23:17:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-25 23:17:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:01,493 INFO L225 Difference]: With dead ends: 4283 [2022-11-25 23:17:01,493 INFO L226 Difference]: Without dead ends: 3521 [2022-11-25 23:17:01,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:01,501 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:01,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:17:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-11-25 23:17:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-11-25 23:17:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-25 23:17:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-11-25 23:17:01,672 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-11-25 23:17:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:01,675 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-11-25 23:17:01,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:17:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-11-25 23:17:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 23:17:01,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:01,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:01,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:17:01,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 908728535, now seen corresponding path program 1 times [2022-11-25 23:17:01,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143881201] [2022-11-25 23:17:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:01,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 23:17:01,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143881201] [2022-11-25 23:17:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143881201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:01,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:17:01,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:17:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290864528] [2022-11-25 23:17:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:01,790 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:17:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:02,361 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-11-25 23:17:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-25 23:17:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:02,385 INFO L225 Difference]: With dead ends: 6754 [2022-11-25 23:17:02,385 INFO L226 Difference]: Without dead ends: 5027 [2022-11-25 23:17:02,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:02,393 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:02,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:17:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-11-25 23:17:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-11-25 23:17:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-25 23:17:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-11-25 23:17:02,633 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-11-25 23:17:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:02,634 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-11-25 23:17:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:17:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-11-25 23:17:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 23:17:02,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:02,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:17:02,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash 562156852, now seen corresponding path program 1 times [2022-11-25 23:17:02,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:02,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364462307] [2022-11-25 23:17:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 23:17:02,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:02,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364462307] [2022-11-25 23:17:02,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364462307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:02,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:17:02,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:17:02,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236295403] [2022-11-25 23:17:02,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:02,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:02,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:02,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:02,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:02,756 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:17:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:03,552 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-11-25 23:17:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-25 23:17:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:03,617 INFO L225 Difference]: With dead ends: 11566 [2022-11-25 23:17:03,620 INFO L226 Difference]: Without dead ends: 8211 [2022-11-25 23:17:03,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:03,635 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:03,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:17:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-11-25 23:17:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-11-25 23:17:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-25 23:17:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-11-25 23:17:04,088 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-11-25 23:17:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:04,088 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-11-25 23:17:04,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:17:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-11-25 23:17:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:17:04,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:04,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 23:17:04,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:17:04,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -942907683, now seen corresponding path program 1 times [2022-11-25 23:17:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:04,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459315675] [2022-11-25 23:17:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 23:17:04,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459315675] [2022-11-25 23:17:04,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459315675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734808907] [2022-11-25 23:17:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:04,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:17:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:17:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:17:04,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:17:04,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734808907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:04,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:17:04,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 23:17:04,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001268253] [2022-11-25 23:17:04,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:04,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:04,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:17:04,535 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:17:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:05,690 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-11-25 23:17:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-25 23:17:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:05,749 INFO L225 Difference]: With dead ends: 13957 [2022-11-25 23:17:05,749 INFO L226 Difference]: Without dead ends: 10627 [2022-11-25 23:17:05,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:17:05,766 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:05,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:17:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-11-25 23:17:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-11-25 23:17:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-25 23:17:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-11-25 23:17:06,518 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-11-25 23:17:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:06,520 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-11-25 23:17:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:17:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-11-25 23:17:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:17:06,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:06,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 23:17:06,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:17:06,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1907244356, now seen corresponding path program 2 times [2022-11-25 23:17:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:06,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851990036] [2022-11-25 23:17:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 23:17:07,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851990036] [2022-11-25 23:17:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851990036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96264396] [2022-11-25 23:17:07,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:07,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:07,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:07,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de7ee8cb-09f9-4f07-be94-e487661275c3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:17:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:17:07,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:17:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:17:07,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 23:17:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96264396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287827766] [2022-11-25 23:17:08,348 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-25 23:17:08,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:08,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:08,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:08,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:43,154 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-25 23:17:43,204 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-25 23:17:51,006 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12