./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/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 29d311a340ddf06876d5e964efa5bbd1c7e50f9bc9213c2393be8e474d394757 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:51:25,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:51:25,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:51:25,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:51:25,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:51:25,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:51:25,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:51:25,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:51:25,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:51:25,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:51:25,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:51:25,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:51:25,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:51:25,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:51:25,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:51:25,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:51:25,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:51:25,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:51:25,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:51:25,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:51:25,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:51:25,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:51:25,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:51:25,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:51:25,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:51:25,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:51:25,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:51:25,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:51:25,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:51:25,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:51:25,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:51:25,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:51:25,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:51:25,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:51:25,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:51:25,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:51:25,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:51:25,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:51:25,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:51:25,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:51:25,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:51:25,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:51:25,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:51:25,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:51:25,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:51:25,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:51:25,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:51:25,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:51:25,970 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:51:25,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:51:25,971 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:51:25,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:51:25,972 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:51:25,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:51:25,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:51:25,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:51:25,973 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:51:25,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:51:25,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:51:25,974 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:51:25,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:51:25,975 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:51:25,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:51:25,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:51:25,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:51:25,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:51:25,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:51:25,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:51:25,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:51:25,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:51:25,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:51:25,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:51:25,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:51:25,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:51:25,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:51:25,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:51:25,979 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:51:25,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:51:25,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:51:25,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:51:25,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:51:25,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:51:25,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:51:25,980 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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29d311a340ddf06876d5e964efa5bbd1c7e50f9bc9213c2393be8e474d394757 [2022-11-25 23:51:26,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:51:26,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:51:26,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:51:26,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:51:26,373 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:51:26,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c [2022-11-25 23:51:29,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:51:30,249 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:51:30,250 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c [2022-11-25 23:51:30,309 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/data/1ea2fc59e/1fa243f43ea640e0be6fa16c0aa937db/FLAG36dfaad8f [2022-11-25 23:51:30,328 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/data/1ea2fc59e/1fa243f43ea640e0be6fa16c0aa937db [2022-11-25 23:51:30,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:51:30,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:51:30,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:51:30,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:51:30,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:51:30,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:51:30" (1/1) ... [2022-11-25 23:51:30,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69cf7a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:30, skipping insertion in model container [2022-11-25 23:51:30,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:51:30" (1/1) ... [2022-11-25 23:51:30,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:51:30,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:51:32,828 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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c[375709,375722] [2022-11-25 23:51:32,870 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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c[383339,383352] [2022-11-25 23:51:33,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:51:33,248 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:51:34,500 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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c[375709,375722] [2022-11-25 23:51:34,519 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_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/sv-benchmarks/c/combinations/Problem05_label48+token_ring.13.cil-2.c[383339,383352] [2022-11-25 23:51:34,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:51:34,645 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:51:34,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34 WrapperNode [2022-11-25 23:51:34,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:51:34,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:51:34,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:51:34,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:51:34,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:34,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,201 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13257 [2022-11-25 23:51:35,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:51:35,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:51:35,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:51:35,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:51:35,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:35,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:51:36,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:51:36,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:51:36,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:51:36,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (1/1) ... [2022-11-25 23:51:36,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:51:36,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:36,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:51:36,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:51:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:51:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 23:51:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 23:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 23:51:36,097 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 23:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 23:51:36,097 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 23:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 23:51:36,097 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 23:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 23:51:36,097 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 23:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 23:51:36,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 23:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:51:36,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:51:36,242 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:51:36,244 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:51:46,227 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:51:48,705 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:51:48,706 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-25 23:51:48,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:51:48 BoogieIcfgContainer [2022-11-25 23:51:48,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:51:48,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:51:48,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:51:48,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:51:48,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:51:30" (1/3) ... [2022-11-25 23:51:48,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4a50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:51:48, skipping insertion in model container [2022-11-25 23:51:48,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:51:34" (2/3) ... [2022-11-25 23:51:48,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4a50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:51:48, skipping insertion in model container [2022-11-25 23:51:48,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:51:48" (3/3) ... [2022-11-25 23:51:48,722 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.13.cil-2.c [2022-11-25 23:51:48,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:51:48,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:51:48,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:51:48,871 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;@6945fbbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:51:48,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:51:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 23:51:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:51:48,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:48,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:48,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1452846506, now seen corresponding path program 1 times [2022-11-25 23:51:48,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:48,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555736804] [2022-11-25 23:51:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:48,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:49,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555736804] [2022-11-25 23:51:49,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555736804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:49,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:51:49,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:51:49,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101146026] [2022-11-25 23:51:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:51:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:51:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:51:49,567 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:51:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:50,931 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2022-11-25 23:51:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:51:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-25 23:51:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:50,965 INFO L225 Difference]: With dead ends: 3866 [2022-11-25 23:51:50,965 INFO L226 Difference]: Without dead ends: 2023 [2022-11-25 23:51:50,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:51:50,983 INFO L413 NwaCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:50,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:51:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-25 23:51:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2022-11-25 23:51:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-25 23:51:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2022-11-25 23:51:51,137 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2022-11-25 23:51:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:51,138 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2022-11-25 23:51:51,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:51:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2022-11-25 23:51:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:51:51,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:51,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:51,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:51:51,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 77694503, now seen corresponding path program 1 times [2022-11-25 23:51:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:51,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397637480] [2022-11-25 23:51:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:51:51,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397637480] [2022-11-25 23:51:51,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397637480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028607932] [2022-11-25 23:51:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:51,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:51,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:51,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:51,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:51:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:51,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:51:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:51:51,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:51,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028607932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:51,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:51:51,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:51:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445960287] [2022-11-25 23:51:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:51,983 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:52,561 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2022-11-25 23:51:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:51:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:52,578 INFO L225 Difference]: With dead ends: 2767 [2022-11-25 23:51:52,578 INFO L226 Difference]: Without dead ends: 2391 [2022-11-25 23:51:52,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:52,583 INFO L413 NwaCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:52,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-25 23:51:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2022-11-25 23:51:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-25 23:51:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2022-11-25 23:51:52,681 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2022-11-25 23:51:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:52,682 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2022-11-25 23:51:52,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2022-11-25 23:51:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:51:52,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:52,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:52,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 23:51:52,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -508323287, now seen corresponding path program 1 times [2022-11-25 23:51:52,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:52,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729071510] [2022-11-25 23:51:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:51:53,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729071510] [2022-11-25 23:51:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729071510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971739177] [2022-11-25 23:51:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:53,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:51:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:53,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:51:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:51:53,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:53,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971739177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:53,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:51:53,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:51:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467268096] [2022-11-25 23:51:53,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:53,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:53,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:53,550 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:54,171 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2022-11-25 23:51:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:51:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:54,193 INFO L225 Difference]: With dead ends: 3856 [2022-11-25 23:51:54,193 INFO L226 Difference]: Without dead ends: 3115 [2022-11-25 23:51:54,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:54,199 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:54,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-25 23:51:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2022-11-25 23:51:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-25 23:51:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2022-11-25 23:51:54,377 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2022-11-25 23:51:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:54,378 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2022-11-25 23:51:54,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2022-11-25 23:51:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:51:54,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:54,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:54,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:51:54,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:54,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash -850543829, now seen corresponding path program 1 times [2022-11-25 23:51:54,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:54,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634244510] [2022-11-25 23:51:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:54,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:51:54,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634244510] [2022-11-25 23:51:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634244510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:54,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099447341] [2022-11-25 23:51:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:54,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:54,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:54,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:54,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:51:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:51:55,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:51:55,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099447341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:55,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:51:55,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:51:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114512475] [2022-11-25 23:51:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:55,299 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:55,962 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2022-11-25 23:51:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:51:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:55,989 INFO L225 Difference]: With dead ends: 6010 [2022-11-25 23:51:55,989 INFO L226 Difference]: Without dead ends: 4547 [2022-11-25 23:51:55,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:55,998 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:55,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2022-11-25 23:51:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2022-11-25 23:51:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-25 23:51:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2022-11-25 23:51:56,210 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2022-11-25 23:51:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:56,210 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2022-11-25 23:51:56,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2022-11-25 23:51:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:51:56,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:56,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:56,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:51:56,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:56,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash 376928429, now seen corresponding path program 1 times [2022-11-25 23:51:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560577105] [2022-11-25 23:51:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:51:56,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560577105] [2022-11-25 23:51:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560577105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198709313] [2022-11-25 23:51:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:56,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:56,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:56,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:56,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:51:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:51:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:51:56,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:56,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198709313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:56,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:51:56,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:51:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958068543] [2022-11-25 23:51:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:56,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:56,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:56,985 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:57,683 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2022-11-25 23:51:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:51:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:57,726 INFO L225 Difference]: With dead ends: 10270 [2022-11-25 23:51:57,726 INFO L226 Difference]: Without dead ends: 7379 [2022-11-25 23:51:57,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:57,744 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:57,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-11-25 23:51:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2022-11-25 23:51:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-25 23:51:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2022-11-25 23:51:58,289 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2022-11-25 23:51:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2022-11-25 23:51:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2022-11-25 23:51:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:51:58,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:58,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:58,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:58,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2114015279, now seen corresponding path program 1 times [2022-11-25 23:51:58,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:58,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059917745] [2022-11-25 23:51:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:51:58,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:58,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059917745] [2022-11-25 23:51:58,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059917745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:58,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374926203] [2022-11-25 23:51:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:58,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:58,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:58,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:51:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:51:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:51:59,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:51:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374926203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:59,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:51:59,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:51:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502821365] [2022-11-25 23:51:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:51:59,073 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:51:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:59,963 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2022-11-25 23:51:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:51:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:00,047 INFO L225 Difference]: With dead ends: 18694 [2022-11-25 23:52:00,047 INFO L226 Difference]: Without dead ends: 12979 [2022-11-25 23:52:00,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:00,079 INFO L413 NwaCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:00,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2022-11-25 23:52:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2022-11-25 23:52:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-25 23:52:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2022-11-25 23:52:00,858 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2022-11-25 23:52:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:00,859 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2022-11-25 23:52:00,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:52:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2022-11-25 23:52:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:52:00,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:00,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:00,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:01,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:01,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1607414125, now seen corresponding path program 1 times [2022-11-25 23:52:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430027747] [2022-11-25 23:52:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:52:01,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430027747] [2022-11-25 23:52:01,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430027747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438131028] [2022-11-25 23:52:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:01,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:01,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:52:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:01,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:52:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:52:01,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:01,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438131028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:01,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:52:01,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:52:01,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083545603] [2022-11-25 23:52:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:01,731 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:52:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:03,363 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2022-11-25 23:52:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:03,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:52:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:03,470 INFO L225 Difference]: With dead ends: 35350 [2022-11-25 23:52:03,470 INFO L226 Difference]: Without dead ends: 24051 [2022-11-25 23:52:03,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:03,517 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:03,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-11-25 23:52:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2022-11-25 23:52:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-25 23:52:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2022-11-25 23:52:04,871 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2022-11-25 23:52:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:04,871 INFO L495 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2022-11-25 23:52:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:52:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2022-11-25 23:52:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:52:04,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:04,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:04,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:05,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:52:05,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 198193963, now seen corresponding path program 1 times [2022-11-25 23:52:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:05,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620901727] [2022-11-25 23:52:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:52:05,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:05,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620901727] [2022-11-25 23:52:05,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620901727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:05,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583601768] [2022-11-25 23:52:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:05,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:05,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:05,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:05,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:52:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:52:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:52:05,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:05,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583601768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:05,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:52:05,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:52:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164743129] [2022-11-25 23:52:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:05,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:05,691 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:52:08,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:08,141 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2022-11-25 23:52:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-25 23:52:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:08,395 INFO L225 Difference]: With dead ends: 68278 [2022-11-25 23:52:08,396 INFO L226 Difference]: Without dead ends: 45939 [2022-11-25 23:52:08,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:08,488 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:08,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2022-11-25 23:52:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2022-11-25 23:52:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-25 23:52:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2022-11-25 23:52:10,715 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2022-11-25 23:52:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:10,716 INFO L495 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2022-11-25 23:52:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:52:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2022-11-25 23:52:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 23:52:10,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:10,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:10,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:11,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605fa7c1-5b65-4743-b4e6-a05d1b6da1c1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:52:11,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1177567827, now seen corresponding path program 1 times [2022-11-25 23:52:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:11,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352591522] [2022-11-25 23:52:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 23:52:11,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352591522] [2022-11-25 23:52:11,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352591522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:11,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:11,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:52:11,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059956620] [2022-11-25 23:52:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:11,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:52:11,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:52:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:11,915 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:52:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:18,027 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2022-11-25 23:52:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:52:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-25 23:52:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:18,811 INFO L225 Difference]: With dead ends: 156917 [2022-11-25 23:52:18,811 INFO L226 Difference]: Without dead ends: 112755 [2022-11-25 23:52:18,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:52:18,969 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4485 mSDsluCounter, 6601 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 9929 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:18,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4507 Valid, 9929 Invalid, 1097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:52:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2022-11-25 23:52:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2022-11-25 23:52:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-25 23:52:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2022-11-25 23:52:24,830 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2022-11-25 23:52:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:24,831 INFO L495 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2022-11-25 23:52:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:52:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2022-11-25 23:52:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-25 23:52:25,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:25,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 23:52:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:52:25,012 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1764144444, now seen corresponding path program 1 times [2022-11-25 23:52:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:25,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933719700] [2022-11-25 23:52:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 23:52:26,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:26,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933719700] [2022-11-25 23:52:26,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933719700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:26,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:26,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:52:26,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223624196] [2022-11-25 23:52:26,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:26,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:52:26,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:52:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:26,113 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:52:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:35,400 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2022-11-25 23:52:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:52:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-25 23:52:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:36,363 INFO L225 Difference]: With dead ends: 238325 [2022-11-25 23:52:36,363 INFO L226 Difference]: Without dead ends: 151539 [2022-11-25 23:52:36,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:52:36,620 INFO L413 NwaCegarLoop]: 3320 mSDtfsCounter, 4254 mSDsluCounter, 9899 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 13219 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:36,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 13219 Invalid, 1415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:52:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151539 states.