./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/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_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/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_c0287989-9dfd-4db4-b0ac-1904efb5d014/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 a0d6ced7e0ff387d58cf8725410ee88dbee5b176eb503e82e37c165076b7e65d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:12:14,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:12:14,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:12:14,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:12:14,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:12:14,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:12:14,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:12:14,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:12:14,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:12:14,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:12:14,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:12:14,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:12:14,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:12:14,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:12:14,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:12:14,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:12:14,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:12:14,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:12:14,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:12:14,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:12:14,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:12:14,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:12:14,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:12:14,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:12:14,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:12:14,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:12:14,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:12:14,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:12:14,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:12:14,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:12:14,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:12:14,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:12:14,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:12:14,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:12:14,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:12:14,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:12:14,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:12:14,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:12:14,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:12:14,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:12:14,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:12:14,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:12:14,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:12:14,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:12:14,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:12:14,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:12:14,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:12:14,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:12:14,707 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:12:14,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:12:14,708 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:12:14,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:12:14,709 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:12:14,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:12:14,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:12:14,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:12:14,710 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:12:14,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:12:14,710 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:12:14,711 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:12:14,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:12:14,712 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:12:14,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:12:14,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:12:14,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:12:14,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:12:14,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:12:14,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:12:14,714 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:12:14,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:12:14,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:12:14,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:12:14,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:12:14,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:12:14,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:14,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:12:14,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:12:14,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:12:14,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:12:14,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:12:14,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:12:14,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:12:14,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:12:14,718 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_c0287989-9dfd-4db4-b0ac-1904efb5d014/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d6ced7e0ff387d58cf8725410ee88dbee5b176eb503e82e37c165076b7e65d [2022-11-26 01:12:15,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:12:15,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:12:15,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:12:15,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:12:15,029 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:12:15,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c [2022-11-26 01:12:18,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:12:18,720 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:12:18,720 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c [2022-11-26 01:12:18,769 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/data/9ecc350e3/15b7dd02f5c34f54815f6b17dab6eed5/FLAG584f7ae5d [2022-11-26 01:12:18,788 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/data/9ecc350e3/15b7dd02f5c34f54815f6b17dab6eed5 [2022-11-26 01:12:18,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:12:18,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:12:18,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:18,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:12:18,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:12:18,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:18" (1/1) ... [2022-11-26 01:12:18,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca3e5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:18, skipping insertion in model container [2022-11-26 01:12:18,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:18" (1/1) ... [2022-11-26 01:12:18,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:12:19,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:21,373 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_c0287989-9dfd-4db4-b0ac-1904efb5d014/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c[380593,380606] [2022-11-26 01:12:21,399 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_c0287989-9dfd-4db4-b0ac-1904efb5d014/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c[383339,383352] [2022-11-26 01:12:21,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:21,632 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:12:22,900 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_c0287989-9dfd-4db4-b0ac-1904efb5d014/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c[380593,380606] [2022-11-26 01:12:22,904 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_c0287989-9dfd-4db4-b0ac-1904efb5d014/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-2.c[383339,383352] [2022-11-26 01:12:22,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:22,998 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:12:22,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22 WrapperNode [2022-11-26 01:12:22,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:23,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:23,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:12:23,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:12:23,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,471 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12914 [2022-11-26 01:12:23,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:23,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:12:23,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:12:23,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:12:23,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,955 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:23,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:24,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:12:24,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:12:24,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:12:24,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:12:24,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (1/1) ... [2022-11-26 01:12:24,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:24,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:12:24,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:12:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:12:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 01:12:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 01:12:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 01:12:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 01:12:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 01:12:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 01:12:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-26 01:12:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-26 01:12:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 01:12:24,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 01:12:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 01:12:24,096 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 01:12:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 01:12:24,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 01:12:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:12:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:12:24,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:12:24,243 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:12:24,245 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:33,379 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:36,052 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:36,052 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-26 01:12:36,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:36 BoogieIcfgContainer [2022-11-26 01:12:36,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:36,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:36,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:36,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:36,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:12:18" (1/3) ... [2022-11-26 01:12:36,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a283fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:36, skipping insertion in model container [2022-11-26 01:12:36,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:22" (2/3) ... [2022-11-26 01:12:36,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a283fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:36, skipping insertion in model container [2022-11-26 01:12:36,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:36" (3/3) ... [2022-11-26 01:12:36,073 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.07.cil-2.c [2022-11-26 01:12:36,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:36,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 01:12:36,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:36,209 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;@8279770, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:36,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 01:12:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-26 01:12:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 01:12:36,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:36,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:36,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash 692912570, now seen corresponding path program 1 times [2022-11-26 01:12:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:36,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159399551] [2022-11-26 01:12:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:36,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159399551] [2022-11-26 01:12:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159399551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:36,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:36,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:12:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340419548] [2022-11-26 01:12:36,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:36,778 INFO L87 Difference]: Start difference. First operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 01:12:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:37,794 INFO L93 Difference]: Finished difference Result 3679 states and 7167 transitions. [2022-11-26 01:12:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:12:37,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-26 01:12:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:37,821 INFO L225 Difference]: With dead ends: 3679 [2022-11-26 01:12:37,821 INFO L226 Difference]: Without dead ends: 1896 [2022-11-26 01:12:37,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:37,837 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 3622 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3622 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3622 Valid, 6656 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:12:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-11-26 01:12:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1895. [2022-11-26 01:12:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1841 states have (on average 1.9369907658881043) internal successors, (3566), 1845 states have internal predecessors, (3566), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-26 01:12:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3644 transitions. [2022-11-26 01:12:37,962 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3644 transitions. Word has length 53 [2022-11-26 01:12:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:37,963 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 3644 transitions. [2022-11-26 01:12:37,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 01:12:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3644 transitions. [2022-11-26 01:12:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:12:37,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:37,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:12:37,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1865273037, now seen corresponding path program 1 times [2022-11-26 01:12:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220766670] [2022-11-26 01:12:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:12:38,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220766670] [2022-11-26 01:12:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220766670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561452085] [2022-11-26 01:12:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:38,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:12:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:12:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 01:12:38,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:38,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561452085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:38,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:38,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:12:38,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400776663] [2022-11-26 01:12:38,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:38,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:38,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:38,609 INFO L87 Difference]: Start difference. First operand 1895 states and 3644 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:39,111 INFO L93 Difference]: Finished difference Result 2386 states and 4389 transitions. [2022-11-26 01:12:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-11-26 01:12:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:39,123 INFO L225 Difference]: With dead ends: 2386 [2022-11-26 01:12:39,123 INFO L226 Difference]: Without dead ends: 2137 [2022-11-26 01:12:39,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:39,126 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:39,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3429 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-11-26 01:12:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2131. [2022-11-26 01:12:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2033 states have (on average 1.8932611903590753) internal successors, (3849), 2038 states have internal predecessors, (3849), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-26 01:12:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3991 transitions. [2022-11-26 01:12:39,202 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3991 transitions. Word has length 102 [2022-11-26 01:12:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:39,202 INFO L495 AbstractCegarLoop]: Abstraction has 2131 states and 3991 transitions. [2022-11-26 01:12:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3991 transitions. [2022-11-26 01:12:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:12:39,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:39,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:39,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:39,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:39,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash 880161841, now seen corresponding path program 1 times [2022-11-26 01:12:39,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53007516] [2022-11-26 01:12:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:12:39,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:39,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53007516] [2022-11-26 01:12:39,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53007516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062337907] [2022-11-26 01:12:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:39,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:39,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:39,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:12:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:12:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:12:39,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062337907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:39,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:39,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:12:39,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38184671] [2022-11-26 01:12:39,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:39,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:39,840 INFO L87 Difference]: Start difference. First operand 2131 states and 3991 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:40,462 INFO L93 Difference]: Finished difference Result 3088 states and 5438 transitions. [2022-11-26 01:12:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-11-26 01:12:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:40,475 INFO L225 Difference]: With dead ends: 3088 [2022-11-26 01:12:40,475 INFO L226 Difference]: Without dead ends: 2603 [2022-11-26 01:12:40,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:40,479 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3446 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:40,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3417 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-11-26 01:12:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2595. [2022-11-26 01:12:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2411 states have (on average 1.8262131895479055) internal successors, (4403), 2418 states have internal predecessors, (4403), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-26 01:12:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 4669 transitions. [2022-11-26 01:12:40,572 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 4669 transitions. Word has length 102 [2022-11-26 01:12:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:40,574 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 4669 transitions. [2022-11-26 01:12:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 4669 transitions. [2022-11-26 01:12:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:12:40,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:40,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:40,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:40,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:40,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1561505523, now seen corresponding path program 1 times [2022-11-26 01:12:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727696698] [2022-11-26 01:12:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:12:40,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727696698] [2022-11-26 01:12:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727696698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613095883] [2022-11-26 01:12:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:41,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:41,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:41,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:12:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:12:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:12:41,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:41,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613095883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:41,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:41,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:12:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513441424] [2022-11-26 01:12:41,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:41,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:41,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:41,248 INFO L87 Difference]: Start difference. First operand 2595 states and 4669 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:41,776 INFO L93 Difference]: Finished difference Result 4468 states and 7486 transitions. [2022-11-26 01:12:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-11-26 01:12:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:41,795 INFO L225 Difference]: With dead ends: 4468 [2022-11-26 01:12:41,796 INFO L226 Difference]: Without dead ends: 3519 [2022-11-26 01:12:41,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:41,804 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3443 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:41,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2022-11-26 01:12:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3507. [2022-11-26 01:12:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3155 states have (on average 1.7391442155309034) internal successors, (5487), 3166 states have internal predecessors, (5487), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-26 01:12:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5993 transitions. [2022-11-26 01:12:42,020 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5993 transitions. Word has length 102 [2022-11-26 01:12:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:42,021 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 5993 transitions. [2022-11-26 01:12:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5993 transitions. [2022-11-26 01:12:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:12:42,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:42,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:42,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:42,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -23331983, now seen corresponding path program 1 times [2022-11-26 01:12:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:42,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736935833] [2022-11-26 01:12:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:12:42,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736935833] [2022-11-26 01:12:42,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736935833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491749194] [2022-11-26 01:12:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:42,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:42,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:42,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:12:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:12:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:12:42,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:42,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491749194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:42,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:42,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 01:12:42,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833669013] [2022-11-26 01:12:42,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:42,674 INFO L87 Difference]: Start difference. First operand 3507 states and 5993 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:43,437 INFO L93 Difference]: Finished difference Result 7180 states and 11482 transitions. [2022-11-26 01:12:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:43,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2022-11-26 01:12:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:43,466 INFO L225 Difference]: With dead ends: 7180 [2022-11-26 01:12:43,466 INFO L226 Difference]: Without dead ends: 5319 [2022-11-26 01:12:43,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:43,477 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3431 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:43,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-11-26 01:12:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5299. [2022-11-26 01:12:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 4619 states have (on average 1.6468932669408962) internal successors, (7607), 4638 states have internal predecessors, (7607), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-26 01:12:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 8577 transitions. [2022-11-26 01:12:43,813 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 8577 transitions. Word has length 102 [2022-11-26 01:12:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:43,813 INFO L495 AbstractCegarLoop]: Abstraction has 5299 states and 8577 transitions. [2022-11-26 01:12:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:12:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 8577 transitions. [2022-11-26 01:12:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:12:43,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:43,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:43,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:44,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash 574985455, now seen corresponding path program 1 times [2022-11-26 01:12:44,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:44,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916647686] [2022-11-26 01:12:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:12:44,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:44,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916647686] [2022-11-26 01:12:44,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916647686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:44,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:44,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279441595] [2022-11-26 01:12:44,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:44,157 INFO L87 Difference]: Start difference. First operand 5299 states and 8577 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 01:12:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:44,924 INFO L93 Difference]: Finished difference Result 8151 states and 12868 transitions. [2022-11-26 01:12:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:44,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2022-11-26 01:12:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:44,964 INFO L225 Difference]: With dead ends: 8151 [2022-11-26 01:12:44,965 INFO L226 Difference]: Without dead ends: 6259 [2022-11-26 01:12:44,973 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 [2022-11-26 01:12:44,974 INFO L413 NwaCegarLoop]: 3307 mSDtfsCounter, 82 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:44,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6536 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2022-11-26 01:12:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 5939. [2022-11-26 01:12:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6542950066960016) internal successors, (8647), 5246 states have internal predecessors, (8647), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-26 01:12:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9649 transitions. [2022-11-26 01:12:45,408 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9649 transitions. Word has length 102 [2022-11-26 01:12:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:45,409 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 9649 transitions. [2022-11-26 01:12:45,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 01:12:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9649 transitions. [2022-11-26 01:12:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 01:12:45,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:45,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:45,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:12:45,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2096456923, now seen corresponding path program 1 times [2022-11-26 01:12:45,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:45,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444753878] [2022-11-26 01:12:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 01:12:45,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444753878] [2022-11-26 01:12:45,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444753878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:45,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:45,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:45,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65563189] [2022-11-26 01:12:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:45,540 INFO L87 Difference]: Start difference. First operand 5939 states and 9649 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:46,236 INFO L93 Difference]: Finished difference Result 14380 states and 22394 transitions. [2022-11-26 01:12:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-11-26 01:12:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:46,299 INFO L225 Difference]: With dead ends: 14380 [2022-11-26 01:12:46,300 INFO L226 Difference]: Without dead ends: 10087 [2022-11-26 01:12:46,320 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 [2022-11-26 01:12:46,321 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3435 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:46,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2022-11-26 01:12:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 10035. [2022-11-26 01:12:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10035 states, 8651 states have (on average 1.5839787307825686) internal successors, (13703), 8686 states have internal predecessors, (13703), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-26 01:12:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 15633 transitions. [2022-11-26 01:12:46,867 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 15633 transitions. Word has length 137 [2022-11-26 01:12:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:46,867 INFO L495 AbstractCegarLoop]: Abstraction has 10035 states and 15633 transitions. [2022-11-26 01:12:46,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 15633 transitions. [2022-11-26 01:12:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 01:12:46,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:46,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 01:12:46,898 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1367043200, now seen corresponding path program 1 times [2022-11-26 01:12:46,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:46,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171154607] [2022-11-26 01:12:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 01:12:47,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171154607] [2022-11-26 01:12:47,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171154607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:47,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:47,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683686229] [2022-11-26 01:12:47,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:47,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:47,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:47,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:47,170 INFO L87 Difference]: Start difference. First operand 10035 states and 15633 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:48,142 INFO L93 Difference]: Finished difference Result 26524 states and 40314 transitions. [2022-11-26 01:12:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-11-26 01:12:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:48,229 INFO L225 Difference]: With dead ends: 26524 [2022-11-26 01:12:48,229 INFO L226 Difference]: Without dead ends: 18135 [2022-11-26 01:12:48,264 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 [2022-11-26 01:12:48,266 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3437 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:48,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2022-11-26 01:12:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 18035. [2022-11-26 01:12:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 15339 states have (on average 1.5317165395397354) internal successors, (23495), 15406 states have internal predecessors, (23495), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-26 01:12:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 27217 transitions. [2022-11-26 01:12:49,378 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 27217 transitions. Word has length 137 [2022-11-26 01:12:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:49,380 INFO L495 AbstractCegarLoop]: Abstraction has 18035 states and 27217 transitions. [2022-11-26 01:12:49,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 27217 transitions. [2022-11-26 01:12:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 01:12:49,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:49,433 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:12:49,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -535978248, now seen corresponding path program 1 times [2022-11-26 01:12:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280921307] [2022-11-26 01:12:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 01:12:49,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:49,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280921307] [2022-11-26 01:12:49,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280921307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:49,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:49,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:49,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274242869] [2022-11-26 01:12:49,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:49,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:49,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:49,576 INFO L87 Difference]: Start difference. First operand 18035 states and 27217 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:51,371 INFO L93 Difference]: Finished difference Result 50236 states and 74970 transitions. [2022-11-26 01:12:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2022-11-26 01:12:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:51,520 INFO L225 Difference]: With dead ends: 50236 [2022-11-26 01:12:51,521 INFO L226 Difference]: Without dead ends: 33847 [2022-11-26 01:12:51,577 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 [2022-11-26 01:12:51,579 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3440 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3440 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:51,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3440 Valid, 3417 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:12:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2022-11-26 01:12:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33651. [2022-11-26 01:12:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 28395 states have (on average 1.4945941186828666) internal successors, (42439), 28526 states have internal predecessors, (42439), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-26 01:12:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 49617 transitions. [2022-11-26 01:12:53,748 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 49617 transitions. Word has length 137 [2022-11-26 01:12:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:53,748 INFO L495 AbstractCegarLoop]: Abstraction has 33651 states and 49617 transitions. [2022-11-26 01:12:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 01:12:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 49617 transitions. [2022-11-26 01:12:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 01:12:53,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:53,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:53,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:12:53,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:53,878 INFO L85 PathProgramCache]: Analyzing trace with hash -121014479, now seen corresponding path program 1 times [2022-11-26 01:12:53,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:53,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649318180] [2022-11-26 01:12:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:53,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 01:12:54,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649318180] [2022-11-26 01:12:54,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649318180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165287449] [2022-11-26 01:12:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:54,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:54,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:12:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:12:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:12:54,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:54,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165287449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:54,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:54,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:12:54,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439023421] [2022-11-26 01:12:54,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:54,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:54,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:54,831 INFO L87 Difference]: Start difference. First operand 33651 states and 49617 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:12:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:56,716 INFO L93 Difference]: Finished difference Result 50171 states and 74711 transitions. [2022-11-26 01:12:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 157 [2022-11-26 01:12:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:56,838 INFO L225 Difference]: With dead ends: 50171 [2022-11-26 01:12:56,838 INFO L226 Difference]: Without dead ends: 33783 [2022-11-26 01:12:56,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:56,881 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 164 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:56,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 6568 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33783 states. [2022-11-26 01:12:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33783 to 33523. [2022-11-26 01:12:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33523 states, 28267 states have (on average 1.4787207698022429) internal successors, (41799), 28398 states have internal predecessors, (41799), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-26 01:12:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33523 states to 33523 states and 48977 transitions. [2022-11-26 01:12:58,699 INFO L78 Accepts]: Start accepts. Automaton has 33523 states and 48977 transitions. Word has length 157 [2022-11-26 01:12:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:58,700 INFO L495 AbstractCegarLoop]: Abstraction has 33523 states and 48977 transitions. [2022-11-26 01:12:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:12:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 33523 states and 48977 transitions. [2022-11-26 01:12:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 01:12:58,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:58,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:58,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:59,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:12:59,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash -624080017, now seen corresponding path program 1 times [2022-11-26 01:12:59,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:59,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669533299] [2022-11-26 01:12:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 01:12:59,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669533299] [2022-11-26 01:12:59,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669533299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102555714] [2022-11-26 01:12:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:59,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:59,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:59,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:12:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:12:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:12:59,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:59,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102555714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:59,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:59,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:12:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044691723] [2022-11-26 01:12:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:59,916 INFO L87 Difference]: Start difference. First operand 33523 states and 48977 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 01:13:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:01,982 INFO L93 Difference]: Finished difference Result 58161 states and 83086 transitions. [2022-11-26 01:13:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:01,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 157 [2022-11-26 01:13:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:02,106 INFO L225 Difference]: With dead ends: 58161 [2022-11-26 01:13:02,107 INFO L226 Difference]: Without dead ends: 41965 [2022-11-26 01:13:02,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:13:02,156 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3443 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:02,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3290 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:13:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41965 states. [2022-11-26 01:13:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41965 to 41965. [2022-11-26 01:13:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41965 states, 35945 states have (on average 1.4227569898455974) internal successors, (51141), 36076 states have internal predecessors, (51141), 3844 states have call successors, (3844), 2175 states have call predecessors, (3844), 2174 states have return successors, (3842), 3714 states have call predecessors, (3842), 3842 states have call successors, (3842) [2022-11-26 01:13:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41965 states to 41965 states and 58827 transitions. [2022-11-26 01:13:04,263 INFO L78 Accepts]: Start accepts. Automaton has 41965 states and 58827 transitions. Word has length 157 [2022-11-26 01:13:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:04,264 INFO L495 AbstractCegarLoop]: Abstraction has 41965 states and 58827 transitions. [2022-11-26 01:13:04,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 01:13:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 41965 states and 58827 transitions. [2022-11-26 01:13:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-26 01:13:04,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:04,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:04,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:04,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:13:04,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1924624218, now seen corresponding path program 1 times [2022-11-26 01:13:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:13:04,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515173854] [2022-11-26 01:13:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:13:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 01:13:05,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:13:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515173854] [2022-11-26 01:13:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515173854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133981022] [2022-11-26 01:13:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:05,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:05,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:05,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:13:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:05,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:13:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:13:05,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:05,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133981022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:05,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:13:05,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-26 01:13:05,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934502551] [2022-11-26 01:13:05,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:05,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:05,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:05,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:13:05,464 INFO L87 Difference]: Start difference. First operand 41965 states and 58827 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:13:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:09,764 INFO L93 Difference]: Finished difference Result 124387 states and 172223 transitions. [2022-11-26 01:13:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:09,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 158 [2022-11-26 01:13:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:10,103 INFO L225 Difference]: With dead ends: 124387 [2022-11-26 01:13:10,104 INFO L226 Difference]: Without dead ends: 84069 [2022-11-26 01:13:10,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:13:10,186 INFO L413 NwaCegarLoop]: 3408 mSDtfsCounter, 3465 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 6945 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:10,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 6945 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:13:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84069 states. [2022-11-26 01:13:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84069 to 83937. [2022-11-26 01:13:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83937 states, 71909 states have (on average 1.4000055625860464) internal successors, (100673), 72296 states have internal predecessors, (100673), 7552 states have call successors, (7552), 4347 states have call predecessors, (7552), 4474 states have return successors, (7934), 7294 states have call predecessors, (7934), 7550 states have call successors, (7934) [2022-11-26 01:13:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83937 states to 83937 states and 116159 transitions. [2022-11-26 01:13:14,481 INFO L78 Accepts]: Start accepts. Automaton has 83937 states and 116159 transitions. Word has length 158 [2022-11-26 01:13:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:14,482 INFO L495 AbstractCegarLoop]: Abstraction has 83937 states and 116159 transitions. [2022-11-26 01:13:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:13:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 83937 states and 116159 transitions. [2022-11-26 01:13:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-26 01:13:14,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:14,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:14,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:14,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:14,936 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1994860703, now seen corresponding path program 1 times [2022-11-26 01:13:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:13:14,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19776658] [2022-11-26 01:13:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:13:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 01:13:15,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:13:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19776658] [2022-11-26 01:13:15,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19776658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367507034] [2022-11-26 01:13:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:15,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:15,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0287989-9dfd-4db4-b0ac-1904efb5d014/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:13:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:13:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:13:15,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:15,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367507034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:15,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:13:15,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:13:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114714851] [2022-11-26 01:13:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:13:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:13:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:13:15,674 INFO L87 Difference]: Start difference. First operand 83937 states and 116159 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)