./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/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_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/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_f04f5eda-ef5a-4370-a297-9487d249e742/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 15863afe4e938ca9562edf6cb3dc5bb7e439eb995cb0a1376182d98c80d63507 --- 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 22:13:43,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:13:43,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:13:43,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:13:43,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:13:43,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:13:43,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:13:43,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:13:43,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:13:43,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:13:43,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:13:43,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:13:43,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:13:43,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:13:43,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:13:43,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:13:43,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:13:43,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:13:43,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:13:43,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:13:43,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:13:43,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:13:43,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:13:43,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:13:43,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:13:43,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:13:43,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:13:43,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:13:43,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:13:43,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:13:43,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:13:43,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:13:43,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:13:43,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:13:43,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:13:43,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:13:43,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:13:43,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:13:43,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:13:43,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:13:43,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:13:43,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:13:43,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:13:43,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:13:43,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:13:43,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:13:43,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:13:43,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:13:43,964 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:13:43,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:13:43,964 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:13:43,964 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:13:43,964 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:13:43,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:13:43,965 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:13:43,965 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:13:43,965 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:13:43,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:13:43,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:13:43,966 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:13:43,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:13:43,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:13:43,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:13:43,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:13:43,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:13:43,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:13:43,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:13:43,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:13:43,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:13:43,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:43,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:13:43,971 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:13:43,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:13:43,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:13:43,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:13:43,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:13:43,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:13:43,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:13:43,972 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_f04f5eda-ef5a-4370-a297-9487d249e742/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15863afe4e938ca9562edf6cb3dc5bb7e439eb995cb0a1376182d98c80d63507 [2022-11-25 22:13:44,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:13:44,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:13:44,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:13:44,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:13:44,269 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:13:44,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c [2022-11-25 22:13:47,383 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:13:48,220 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:13:48,221 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c [2022-11-25 22:13:48,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/data/e91138835/0768c76ddda7492188cf38a7fc126533/FLAG41d9f3826 [2022-11-25 22:13:48,292 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/data/e91138835/0768c76ddda7492188cf38a7fc126533 [2022-11-25 22:13:48,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:13:48,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:13:48,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:48,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:13:48,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:13:48,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:48" (1/1) ... [2022-11-25 22:13:48,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c61c71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:48, skipping insertion in model container [2022-11-25 22:13:48,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:48" (1/1) ... [2022-11-25 22:13:48,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:13:48,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:13:50,990 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_f04f5eda-ef5a-4370-a297-9487d249e742/sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c[380323,380336] [2022-11-25 22:13:51,016 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_f04f5eda-ef5a-4370-a297-9487d249e742/sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c[383339,383352] [2022-11-25 22:13:51,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:51,294 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:13:52,624 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_f04f5eda-ef5a-4370-a297-9487d249e742/sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c[380323,380336] [2022-11-25 22:13:52,631 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_f04f5eda-ef5a-4370-a297-9487d249e742/sv-benchmarks/c/combinations/Problem05_label45+token_ring.08.cil-2.c[383339,383352] [2022-11-25 22:13:52,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:52,776 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:13:52,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52 WrapperNode [2022-11-25 22:13:52,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:52,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:52,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:13:52,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:13:52,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:52,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,394 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12972 [2022-11-25 22:13:53,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:53,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:13:53,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:13:53,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:13:53,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:13:53,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:13:53,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:13:53,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:13:53,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (1/1) ... [2022-11-25 22:13:53,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:53,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:53,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:13:53,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:13:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:13:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 22:13:53,995 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 22:13:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 22:13:53,996 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 22:13:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 22:13:53,996 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 22:13:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-25 22:13:53,996 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-25 22:13:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 22:13:53,997 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 22:13:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 22:13:53,997 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 22:13:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 22:13:53,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 22:13:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:13:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:13:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:13:54,135 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:13:54,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:14:03,433 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:14:06,014 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:14:06,014 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-25 22:14:06,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:06 BoogieIcfgContainer [2022-11-25 22:14:06,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:14:06,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:14:06,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:14:06,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:14:06,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:13:48" (1/3) ... [2022-11-25 22:14:06,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86952f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:06, skipping insertion in model container [2022-11-25 22:14:06,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:52" (2/3) ... [2022-11-25 22:14:06,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86952f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:06, skipping insertion in model container [2022-11-25 22:14:06,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:06" (3/3) ... [2022-11-25 22:14:06,032 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.08.cil-2.c [2022-11-25 22:14:06,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:14:06,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:14:06,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:14:06,177 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;@2a9138b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:14:06,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:14:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 22:14:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 22:14:06,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:06,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:06,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1593190993, now seen corresponding path program 1 times [2022-11-25 22:14:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:06,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153156657] [2022-11-25 22:14:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:06,757 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 22:14:06,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:06,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153156657] [2022-11-25 22:14:06,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153156657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:06,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:06,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:14:06,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979485306] [2022-11-25 22:14:06,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:06,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:14:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:14:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:14:06,823 INFO L87 Difference]: Start difference. First operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:14:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:07,953 INFO L93 Difference]: Finished difference Result 3712 states and 7223 transitions. [2022-11-25 22:14:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:14:07,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-25 22:14:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:07,986 INFO L225 Difference]: With dead ends: 3712 [2022-11-25 22:14:07,986 INFO L226 Difference]: Without dead ends: 1918 [2022-11-25 22:14:07,998 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 22:14:08,002 INFO L413 NwaCegarLoop]: 3398 mSDtfsCounter, 3655 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3655 SdHoareTripleChecker+Valid, 6712 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:08,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3655 Valid, 6712 Invalid, 680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:14:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-11-25 22:14:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1917. [2022-11-25 22:14:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1861 states have (on average 1.9333691563675444) internal successors, (3598), 1865 states have internal predecessors, (3598), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-25 22:14:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3680 transitions. [2022-11-25 22:14:08,169 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3680 transitions. Word has length 56 [2022-11-25 22:14:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:08,170 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 3680 transitions. [2022-11-25 22:14:08,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:14:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3680 transitions. [2022-11-25 22:14:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:14:08,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:08,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:08,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:14:08,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1134924655, now seen corresponding path program 1 times [2022-11-25 22:14:08,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:08,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184645947] [2022-11-25 22:14:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:14:08,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:08,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184645947] [2022-11-25 22:14:08,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184645947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757213721] [2022-11-25 22:14:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:08,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:08,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:08,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:14:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:14:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:14:08,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:14:08,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757213721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:14:08,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:14:08,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836655357] [2022-11-25 22:14:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:14:08,918 INFO L87 Difference]: Start difference. First operand 1917 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:09,493 INFO L93 Difference]: Finished difference Result 2452 states and 4499 transitions. [2022-11-25 22:14:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-25 22:14:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:09,510 INFO L225 Difference]: With dead ends: 2452 [2022-11-25 22:14:09,510 INFO L226 Difference]: Without dead ends: 2181 [2022-11-25 22:14:09,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 22:14:09,515 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3455 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:09,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3461 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-11-25 22:14:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2175. [2022-11-25 22:14:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2073 states have (on average 1.8876025084418717) internal successors, (3913), 2078 states have internal predecessors, (3913), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-25 22:14:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 4063 transitions. [2022-11-25 22:14:09,625 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 4063 transitions. Word has length 109 [2022-11-25 22:14:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:09,625 INFO L495 AbstractCegarLoop]: Abstraction has 2175 states and 4063 transitions. [2022-11-25 22:14:09,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 4063 transitions. [2022-11-25 22:14:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:14:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:09,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:09,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:09,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 258097615, now seen corresponding path program 1 times [2022-11-25 22:14:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:09,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301935312] [2022-11-25 22:14:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:14:10,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301935312] [2022-11-25 22:14:10,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301935312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:10,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897053887] [2022-11-25 22:14:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:10,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:10,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:14:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:14:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 22:14:10,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:14:10,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897053887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:10,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:14:10,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:14:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605324583] [2022-11-25 22:14:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:10,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:14:10,414 INFO L87 Difference]: Start difference. First operand 2175 states and 4063 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:11,013 INFO L93 Difference]: Finished difference Result 3220 states and 5658 transitions. [2022-11-25 22:14:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-25 22:14:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:11,026 INFO L225 Difference]: With dead ends: 3220 [2022-11-25 22:14:11,026 INFO L226 Difference]: Without dead ends: 2691 [2022-11-25 22:14:11,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 22:14:11,032 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3464 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-25 22:14:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2683. [2022-11-25 22:14:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2491 states have (on average 1.818948213568848) internal successors, (4531), 2498 states have internal predecessors, (4531), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-25 22:14:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4813 transitions. [2022-11-25 22:14:11,167 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4813 transitions. Word has length 109 [2022-11-25 22:14:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:11,168 INFO L495 AbstractCegarLoop]: Abstraction has 2683 states and 4813 transitions. [2022-11-25 22:14:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4813 transitions. [2022-11-25 22:14:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:14:11,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:11,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:11,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:11,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:11,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1033092975, now seen corresponding path program 1 times [2022-11-25 22:14:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704797118] [2022-11-25 22:14:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:14:11,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704797118] [2022-11-25 22:14:11,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704797118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798497612] [2022-11-25 22:14:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:11,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:11,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:14:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:14:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 22:14:11,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:14:11,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798497612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:11,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:14:11,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:14:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880119873] [2022-11-25 22:14:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:14:11,840 INFO L87 Difference]: Start difference. First operand 2683 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:12,537 INFO L93 Difference]: Finished difference Result 4732 states and 7926 transitions. [2022-11-25 22:14:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-25 22:14:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:12,559 INFO L225 Difference]: With dead ends: 4732 [2022-11-25 22:14:12,560 INFO L226 Difference]: Without dead ends: 3695 [2022-11-25 22:14:12,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 22:14:12,570 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 3461 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:12,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-11-25 22:14:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3683. [2022-11-25 22:14:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3315 states have (on average 1.7324283559577678) internal successors, (5743), 3326 states have internal predecessors, (5743), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-25 22:14:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6281 transitions. [2022-11-25 22:14:12,794 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6281 transitions. Word has length 109 [2022-11-25 22:14:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:12,794 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 6281 transitions. [2022-11-25 22:14:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6281 transitions. [2022-11-25 22:14:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:14:12,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:12,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:12,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:13,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1628690993, now seen corresponding path program 1 times [2022-11-25 22:14:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:13,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932925383] [2022-11-25 22:14:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:13,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:14:13,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:13,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932925383] [2022-11-25 22:14:13,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932925383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:13,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599139960] [2022-11-25 22:14:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:13,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:13,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:13,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:13,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:14:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:14:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:14:13,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:14:13,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599139960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:13,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:14:13,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:14:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378849787] [2022-11-25 22:14:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:13,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:14:13,513 INFO L87 Difference]: Start difference. First operand 3683 states and 6281 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:14,223 INFO L93 Difference]: Finished difference Result 7708 states and 12362 transitions. [2022-11-25 22:14:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-25 22:14:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:14,256 INFO L225 Difference]: With dead ends: 7708 [2022-11-25 22:14:14,257 INFO L226 Difference]: Without dead ends: 5671 [2022-11-25 22:14:14,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 22:14:14,267 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 3449 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:14,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2022-11-25 22:14:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 5651. [2022-11-25 22:14:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 4939 states have (on average 1.643855031382871) internal successors, (8119), 4958 states have internal predecessors, (8119), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-25 22:14:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 9153 transitions. [2022-11-25 22:14:14,590 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 9153 transitions. Word has length 109 [2022-11-25 22:14:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:14,592 INFO L495 AbstractCegarLoop]: Abstraction has 5651 states and 9153 transitions. [2022-11-25 22:14:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:14:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 9153 transitions. [2022-11-25 22:14:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:14:14,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:14,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:14,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:14,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f04f5eda-ef5a-4370-a297-9487d249e742/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:14,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1742937135, now seen corresponding path program 1 times [2022-11-25 22:14:14,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:14,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606444077] [2022-11-25 22:14:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:14:14,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606444077] [2022-11-25 22:14:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606444077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:14,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:14,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534276397] [2022-11-25 22:14:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:14,967 INFO L87 Difference]: Start difference. First operand 5651 states and 9153 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:14:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:15,810 INFO L93 Difference]: Finished difference Result 8775 states and 13908 transitions. [2022-11-25 22:14:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-25 22:14:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:15,882 INFO L225 Difference]: With dead ends: 8775 [2022-11-25 22:14:15,882 INFO L226 Difference]: Without dead ends: 6707 [2022-11-25 22:14:15,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:15,894 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 91 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6576 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:15,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6576 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:14:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2022-11-25 22:14:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6371. [2022-11-25 22:14:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6371 states, 5627 states have (on average 1.6532788341922873) internal successors, (9303), 5646 states have internal predecessors, (9303), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-25 22:14:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6371 states to 6371 states and 10369 transitions. [2022-11-25 22:14:16,286 INFO L78 Accepts]: Start accepts. Automaton has 6371 states and 10369 transitions. Word has length 109 [2022-11-25 22:14:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:16,288 INFO L495 AbstractCegarLoop]: Abstraction has 6371 states and 10369 transitions. [2022-11-25 22:14:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:14:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6371 states and 10369 transitions. [2022-11-25 22:14:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 22:14:16,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:16,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:14:16,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1939216255, now seen corresponding path program 1 times [2022-11-25 22:14:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318934338] [2022-11-25 22:14:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 22:14:16,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318934338] [2022-11-25 22:14:16,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318934338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:16,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:16,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830431663] [2022-11-25 22:14:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:16,468 INFO L87 Difference]: Start difference. First operand 6371 states and 10369 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:17,518 INFO L93 Difference]: Finished difference Result 15676 states and 24586 transitions. [2022-11-25 22:14:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-25 22:14:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:17,564 INFO L225 Difference]: With dead ends: 15676 [2022-11-25 22:14:17,564 INFO L226 Difference]: Without dead ends: 10951 [2022-11-25 22:14:17,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:17,580 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3451 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:17,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10951 states. [2022-11-25 22:14:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10951 to 10899. [2022-11-25 22:14:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10899 states, 9451 states have (on average 1.5887207702888584) internal successors, (15015), 9486 states have internal predecessors, (15015), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-25 22:14:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10899 states to 10899 states and 17073 transitions. [2022-11-25 22:14:18,084 INFO L78 Accepts]: Start accepts. Automaton has 10899 states and 17073 transitions. Word has length 147 [2022-11-25 22:14:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:18,085 INFO L495 AbstractCegarLoop]: Abstraction has 10899 states and 17073 transitions. [2022-11-25 22:14:18,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10899 states and 17073 transitions. [2022-11-25 22:14:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 22:14:18,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:18,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:14:18,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash 102707406, now seen corresponding path program 1 times [2022-11-25 22:14:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:18,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250960263] [2022-11-25 22:14:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:18,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 22:14:18,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250960263] [2022-11-25 22:14:18,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250960263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:18,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:18,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131385822] [2022-11-25 22:14:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:18,247 INFO L87 Difference]: Start difference. First operand 10899 states and 17073 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:19,621 INFO L93 Difference]: Finished difference Result 29116 states and 44698 transitions. [2022-11-25 22:14:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-25 22:14:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:19,710 INFO L225 Difference]: With dead ends: 29116 [2022-11-25 22:14:19,710 INFO L226 Difference]: Without dead ends: 19863 [2022-11-25 22:14:19,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:19,746 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3453 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:19,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19863 states. [2022-11-25 22:14:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19863 to 19763. [2022-11-25 22:14:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19763 states, 16939 states have (on average 1.5419446248302733) internal successors, (26119), 17006 states have internal predecessors, (26119), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-25 22:14:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 30097 transitions. [2022-11-25 22:14:20,882 INFO L78 Accepts]: Start accepts. Automaton has 19763 states and 30097 transitions. Word has length 147 [2022-11-25 22:14:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:20,883 INFO L495 AbstractCegarLoop]: Abstraction has 19763 states and 30097 transitions. [2022-11-25 22:14:20,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 19763 states and 30097 transitions. [2022-11-25 22:14:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 22:14:20,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:20,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:14:20,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2068140221, now seen corresponding path program 1 times [2022-11-25 22:14:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932001698] [2022-11-25 22:14:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 22:14:21,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932001698] [2022-11-25 22:14:21,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932001698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:21,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:21,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151574029] [2022-11-25 22:14:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:21,093 INFO L87 Difference]: Start difference. First operand 19763 states and 30097 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:23,424 INFO L93 Difference]: Finished difference Result 55420 states and 83738 transitions. [2022-11-25 22:14:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-25 22:14:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:23,648 INFO L225 Difference]: With dead ends: 55420 [2022-11-25 22:14:23,648 INFO L226 Difference]: Without dead ends: 37303 [2022-11-25 22:14:23,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:23,706 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3455 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:23,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37303 states. [2022-11-25 22:14:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37303 to 37107. [2022-11-25 22:14:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37107 states, 31595 states have (on average 1.5093210951099858) internal successors, (47687), 31726 states have internal predecessors, (47687), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-25 22:14:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37107 states to 37107 states and 55377 transitions. [2022-11-25 22:14:25,920 INFO L78 Accepts]: Start accepts. Automaton has 37107 states and 55377 transitions. Word has length 147 [2022-11-25 22:14:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:25,921 INFO L495 AbstractCegarLoop]: Abstraction has 37107 states and 55377 transitions. [2022-11-25 22:14:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 37107 states and 55377 transitions. [2022-11-25 22:14:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 22:14:26,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:26,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:14:26,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash -870785471, now seen corresponding path program 1 times [2022-11-25 22:14:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:26,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067418023] [2022-11-25 22:14:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 22:14:26,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:26,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067418023] [2022-11-25 22:14:26,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067418023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:26,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:26,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321494904] [2022-11-25 22:14:26,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:26,146 INFO L87 Difference]: Start difference. First operand 37107 states and 55377 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:30,173 INFO L93 Difference]: Finished difference Result 106876 states and 159450 transitions. [2022-11-25 22:14:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-25 22:14:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:30,501 INFO L225 Difference]: With dead ends: 106876 [2022-11-25 22:14:30,501 INFO L226 Difference]: Without dead ends: 71415 [2022-11-25 22:14:30,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:30,611 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3458 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:30,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3442 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71415 states. [2022-11-25 22:14:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71415 to 71027. [2022-11-25 22:14:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71027 states, 60267 states have (on average 1.485771649493089) internal successors, (89543), 60526 states have internal predecessors, (89543), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-25 22:14:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71027 states to 71027 states and 104401 transitions. [2022-11-25 22:14:34,459 INFO L78 Accepts]: Start accepts. Automaton has 71027 states and 104401 transitions. Word has length 147 [2022-11-25 22:14:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:34,459 INFO L495 AbstractCegarLoop]: Abstraction has 71027 states and 104401 transitions. [2022-11-25 22:14:34,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:14:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 71027 states and 104401 transitions. [2022-11-25 22:14:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-25 22:14:34,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:34,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:34,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:14:34,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:34,743 INFO L85 PathProgramCache]: Analyzing trace with hash -874732928, now seen corresponding path program 1 times [2022-11-25 22:14:34,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:34,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020294387] [2022-11-25 22:14:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-25 22:14:34,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:34,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020294387] [2022-11-25 22:14:34,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020294387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:34,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:14:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885809902] [2022-11-25 22:14:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:14:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:14:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:34,901 INFO L87 Difference]: Start difference. First operand 71027 states and 104401 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:14:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:40,611 INFO L93 Difference]: Finished difference Result 184187 states and 274647 transitions. [2022-11-25 22:14:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:14:40,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-11-25 22:14:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:41,363 INFO L225 Difference]: With dead ends: 184187 [2022-11-25 22:14:41,363 INFO L226 Difference]: Without dead ends: 114807 [2022-11-25 22:14:41,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:14:41,552 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 109 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6528 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:41,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6528 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:14:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114807 states. [2022-11-25 22:14:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114807 to 100731. [2022-11-25 22:14:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100731 states, 88431 states have (on average 1.551073718492384) internal successors, (137163), 88691 states have internal predecessors, (137163), 8200 states have call successors, (8200), 4099 states have call predecessors, (8200), 4098 states have return successors, (8198), 7941 states have call predecessors, (8198), 8198 states have call successors, (8198) [2022-11-25 22:14:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100731 states to 100731 states and 153561 transitions. [2022-11-25 22:14:47,588 INFO L78 Accepts]: Start accepts. Automaton has 100731 states and 153561 transitions. Word has length 168 [2022-11-25 22:14:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:47,590 INFO L495 AbstractCegarLoop]: Abstraction has 100731 states and 153561 transitions. [2022-11-25 22:14:47,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:14:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 100731 states and 153561 transitions.