./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P --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 bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:39:05,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:39:05,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:39:05,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:39:05,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:39:05,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:39:05,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:39:05,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:39:05,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:39:05,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:39:05,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:39:05,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:39:05,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:39:05,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:39:05,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:39:05,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:39:05,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:39:05,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:39:05,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:39:05,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:39:05,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:39:05,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:39:05,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:39:05,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:39:05,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:39:05,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:39:05,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:39:05,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:39:05,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:39:05,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:39:05,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:39:05,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:39:05,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:39:05,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:39:05,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:39:05,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:39:05,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:39:05,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:39:05,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:39:05,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:39:05,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:39:05,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:39:06,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:39:06,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:39:06,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:39:06,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:39:06,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:39:06,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:39:06,007 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:39:06,007 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:39:06,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:39:06,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:39:06,009 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:39:06,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:39:06,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:39:06,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:39:06,010 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:39:06,010 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:39:06,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:39:06,011 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:39:06,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:39:06,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:39:06,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:39:06,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:39:06,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:39:06,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:39:06,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:39:06,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:39:06,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:39:06,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:39:06,015 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:39:06,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:39:06,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:39:06,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:39:06,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:39:06,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:39:06,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:39:06,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:39:06,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:39:06,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:39:06,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:39:06,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:39:06,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:39:06,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 [2021-11-21 00:39:06,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:39:06,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:39:06,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:39:06,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:39:06,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:39:06,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-11-21 00:39:06,392 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/data/35290e5da/cfa0f1bbfbd748a49a089635c9631a14/FLAG34c4fd84f [2021-11-21 00:39:07,498 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:39:07,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-11-21 00:39:07,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/data/35290e5da/cfa0f1bbfbd748a49a089635c9631a14/FLAG34c4fd84f [2021-11-21 00:39:07,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/data/35290e5da/cfa0f1bbfbd748a49a089635c9631a14 [2021-11-21 00:39:07,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:39:07,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:39:07,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:39:07,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:39:07,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:39:07,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:39:07" (1/1) ... [2021-11-21 00:39:07,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100b93ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:07, skipping insertion in model container [2021-11-21 00:39:07,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:39:07" (1/1) ... [2021-11-21 00:39:07,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:39:08,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:39:10,376 WARN L230 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_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c[377069,377082] [2021-11-21 00:39:10,421 WARN L230 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_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c[383339,383352] [2021-11-21 00:39:10,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:39:10,629 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:39:11,919 WARN L230 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_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c[377069,377082] [2021-11-21 00:39:11,930 WARN L230 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_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c[383339,383352] [2021-11-21 00:39:11,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:39:12,027 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:39:12,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12 WrapperNode [2021-11-21 00:39:12,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:39:12,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:39:12,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:39:12,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:39:12,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,603 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-11-21 00:39:12,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:39:12,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:39:12,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:39:12,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:39:12,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:12,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:13,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:13,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:13,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:39:13,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:39:13,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:39:13,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:39:13,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (1/1) ... [2021-11-21 00:39:13,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:39:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:13,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:39:13,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:39:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:39:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:39:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:39:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:39:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:39:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 00:39:13,576 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 00:39:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:39:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:39:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:39:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:39:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:39:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:39:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:39:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:39:13,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:39:13,768 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:39:13,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:39:21,181 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:39:23,047 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:39:23,047 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 00:39:23,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:39:23 BoogieIcfgContainer [2021-11-21 00:39:23,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:39:23,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:39:23,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:39:23,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:39:23,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:39:07" (1/3) ... [2021-11-21 00:39:23,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea99f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:39:23, skipping insertion in model container [2021-11-21 00:39:23,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:39:12" (2/3) ... [2021-11-21 00:39:23,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea99f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:39:23, skipping insertion in model container [2021-11-21 00:39:23,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:39:23" (3/3) ... [2021-11-21 00:39:23,061 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.02.cil-1.c [2021-11-21 00:39:23,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:39:23,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:39:23,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:39:23,128 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:39:23,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:39:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:39:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:39:23,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:23,188 INFO L514 BasicCegarLoop]: 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] [2021-11-21 00:39:23,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 917846668, now seen corresponding path program 1 times [2021-11-21 00:39:23,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:23,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365359953] [2021-11-21 00:39:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:23,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:23,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365359953] [2021-11-21 00:39:23,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365359953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:23,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:23,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:39:23,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970821523] [2021-11-21 00:39:23,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:23,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:39:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:39:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:39:23,582 INFO L87 Difference]: Start difference. First operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:39:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:24,471 INFO L93 Difference]: Finished difference Result 3503 states and 6867 transitions. [2021-11-21 00:39:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:39:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-21 00:39:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:24,498 INFO L225 Difference]: With dead ends: 3503 [2021-11-21 00:39:24,499 INFO L226 Difference]: Without dead ends: 1781 [2021-11-21 00:39:24,507 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:39:24,511 INFO L933 BasicCegarLoop]: 3211 mSDtfsCounter, 3449 mSDsluCounter, 3401 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:24,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3449 Valid, 6364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:39:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-11-21 00:39:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1780. [2021-11-21 00:39:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1738 states have (on average 1.9562715765247412) internal successors, (3400), 1741 states have internal predecessors, (3400), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 00:39:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3456 transitions. [2021-11-21 00:39:24,644 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3456 transitions. Word has length 37 [2021-11-21 00:39:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:24,645 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3456 transitions. [2021-11-21 00:39:24,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:39:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3456 transitions. [2021-11-21 00:39:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:39:24,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:24,650 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:24,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:39:24,651 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2073366800, now seen corresponding path program 1 times [2021-11-21 00:39:24,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359106193] [2021-11-21 00:39:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:24,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:39:24,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:24,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359106193] [2021-11-21 00:39:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359106193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:24,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981507909] [2021-11-21 00:39:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:24,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:24,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:24,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:24,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:39:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:39:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:39:25,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981507909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:25,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:25,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 00:39:25,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2771830] [2021-11-21 00:39:25,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:25,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:25,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:25,084 INFO L87 Difference]: Start difference. First operand 1780 states and 3456 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:39:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:25,475 INFO L93 Difference]: Finished difference Result 2041 states and 3815 transitions. [2021-11-21 00:39:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-11-21 00:39:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:25,491 INFO L225 Difference]: With dead ends: 2041 [2021-11-21 00:39:25,491 INFO L226 Difference]: Without dead ends: 1907 [2021-11-21 00:39:25,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:25,494 INFO L933 BasicCegarLoop]: 3173 mSDtfsCounter, 3348 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:25,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3348 Valid, 3248 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:39:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-21 00:39:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1903. [2021-11-21 00:39:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1827 states have (on average 1.9250136836343732) internal successors, (3517), 1831 states have internal predecessors, (3517), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-21 00:39:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3617 transitions. [2021-11-21 00:39:25,565 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3617 transitions. Word has length 66 [2021-11-21 00:39:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 3617 transitions. [2021-11-21 00:39:25,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:39:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3617 transitions. [2021-11-21 00:39:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:39:25,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:25,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:25,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:25,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 00:39:25,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash -866783824, now seen corresponding path program 1 times [2021-11-21 00:39:25,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:25,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591546856] [2021-11-21 00:39:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:25,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:39:25,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591546856] [2021-11-21 00:39:25,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591546856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:25,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:25,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:39:25,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143364375] [2021-11-21 00:39:25,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:25,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:39:25,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:39:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:25,985 INFO L87 Difference]: Start difference. First operand 1903 states and 3617 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:39:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:26,956 INFO L93 Difference]: Finished difference Result 2443 states and 4338 transitions. [2021-11-21 00:39:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:39:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2021-11-21 00:39:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:26,978 INFO L225 Difference]: With dead ends: 2443 [2021-11-21 00:39:26,978 INFO L226 Difference]: Without dead ends: 2187 [2021-11-21 00:39:26,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:39:26,983 INFO L933 BasicCegarLoop]: 3151 mSDtfsCounter, 3509 mSDsluCounter, 10004 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 12489 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:26,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 12489 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:39:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-11-21 00:39:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2133. [2021-11-21 00:39:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 1991 states have (on average 1.8719236564540431) internal successors, (3727), 1997 states have internal predecessors, (3727), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-21 00:39:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3911 transitions. [2021-11-21 00:39:27,096 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3911 transitions. Word has length 66 [2021-11-21 00:39:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:27,097 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 3911 transitions. [2021-11-21 00:39:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:39:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3911 transitions. [2021-11-21 00:39:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:39:27,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:27,104 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:39:27,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1105360761, now seen corresponding path program 1 times [2021-11-21 00:39:27,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087413786] [2021-11-21 00:39:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:27,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:39:27,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:27,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087413786] [2021-11-21 00:39:27,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087413786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:27,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:27,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:39:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397588965] [2021-11-21 00:39:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:27,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:39:27,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:39:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:27,267 INFO L87 Difference]: Start difference. First operand 2133 states and 3911 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:39:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:28,116 INFO L93 Difference]: Finished difference Result 2871 states and 4883 transitions. [2021-11-21 00:39:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:39:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2021-11-21 00:39:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:28,133 INFO L225 Difference]: With dead ends: 2871 [2021-11-21 00:39:28,134 INFO L226 Difference]: Without dead ends: 2385 [2021-11-21 00:39:28,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:39:28,137 INFO L933 BasicCegarLoop]: 3155 mSDtfsCounter, 3475 mSDsluCounter, 10013 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 12503 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:28,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3481 Valid, 12503 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:39:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-11-21 00:39:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2359. [2021-11-21 00:39:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2151 states have (on average 1.8256624825662482) internal successors, (3927), 2159 states have internal predecessors, (3927), 134 states have call successors, (134), 72 states have call predecessors, (134), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-21 00:39:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 4195 transitions. [2021-11-21 00:39:28,240 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 4195 transitions. Word has length 67 [2021-11-21 00:39:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:28,241 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 4195 transitions. [2021-11-21 00:39:28,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:39:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 4195 transitions. [2021-11-21 00:39:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:39:28,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:28,244 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:28,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:39:28,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1117618676, now seen corresponding path program 1 times [2021-11-21 00:39:28,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:28,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960287239] [2021-11-21 00:39:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:28,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:39:28,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:28,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960287239] [2021-11-21 00:39:28,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960287239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:28,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:28,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:28,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846474791] [2021-11-21 00:39:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:28,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:28,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:28,311 INFO L87 Difference]: Start difference. First operand 2359 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:39:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:28,792 INFO L93 Difference]: Finished difference Result 2904 states and 4905 transitions. [2021-11-21 00:39:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-21 00:39:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:28,810 INFO L225 Difference]: With dead ends: 2904 [2021-11-21 00:39:28,810 INFO L226 Difference]: Without dead ends: 2532 [2021-11-21 00:39:28,815 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:39:28,818 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 35 mSDsluCounter, 3368 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6322 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:28,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 6322 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-21 00:39:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2439. [2021-11-21 00:39:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2219 states have (on average 1.8138801261829653) internal successors, (4025), 2227 states have internal predecessors, (4025), 140 states have call successors, (140), 78 states have call predecessors, (140), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-21 00:39:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 4305 transitions. [2021-11-21 00:39:28,937 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 4305 transitions. Word has length 68 [2021-11-21 00:39:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:28,939 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 4305 transitions. [2021-11-21 00:39:28,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:39:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 4305 transitions. [2021-11-21 00:39:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:39:28,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:28,945 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:28,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:39:28,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1038688214, now seen corresponding path program 1 times [2021-11-21 00:39:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:28,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397880430] [2021-11-21 00:39:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:28,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:39:29,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397880430] [2021-11-21 00:39:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397880430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:29,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:29,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134984822] [2021-11-21 00:39:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:29,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:29,026 INFO L87 Difference]: Start difference. First operand 2439 states and 4305 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:39:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:29,475 INFO L93 Difference]: Finished difference Result 3626 states and 5863 transitions. [2021-11-21 00:39:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2021-11-21 00:39:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:29,495 INFO L225 Difference]: With dead ends: 3626 [2021-11-21 00:39:29,495 INFO L226 Difference]: Without dead ends: 2833 [2021-11-21 00:39:29,499 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:39:29,502 INFO L933 BasicCegarLoop]: 3174 mSDtfsCounter, 3341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:29,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3341 Valid, 3249 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:39:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-11-21 00:39:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2822. [2021-11-21 00:39:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2498 states have (on average 1.7502001601281025) internal successors, (4372), 2509 states have internal predecessors, (4372), 205 states have call successors, (205), 117 states have call predecessors, (205), 117 states have return successors, (205), 196 states have call predecessors, (205), 205 states have call successors, (205) [2021-11-21 00:39:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4782 transitions. [2021-11-21 00:39:29,641 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4782 transitions. Word has length 87 [2021-11-21 00:39:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:29,641 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 4782 transitions. [2021-11-21 00:39:29,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:39:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4782 transitions. [2021-11-21 00:39:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:39:29,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:29,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:39:29,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:39:29,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 452596935, now seen corresponding path program 1 times [2021-11-21 00:39:29,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:29,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753548078] [2021-11-21 00:39:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:29,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:39:29,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:29,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753548078] [2021-11-21 00:39:29,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753548078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:29,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142861332] [2021-11-21 00:39:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:29,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:29,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:29,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:29,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:39:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:39:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:39:30,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:30,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142861332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:30,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:30,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 00:39:30,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109635594] [2021-11-21 00:39:30,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:30,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:30,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:30,062 INFO L87 Difference]: Start difference. First operand 2822 states and 4782 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:30,702 INFO L93 Difference]: Finished difference Result 3874 states and 6153 transitions. [2021-11-21 00:39:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-21 00:39:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:30,724 INFO L225 Difference]: With dead ends: 3874 [2021-11-21 00:39:30,725 INFO L226 Difference]: Without dead ends: 3088 [2021-11-21 00:39:30,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:30,730 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 50 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:30,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 6332 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-11-21 00:39:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2927. [2021-11-21 00:39:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2585 states have (on average 1.7388781431334623) internal successors, (4495), 2596 states have internal predecessors, (4495), 214 states have call successors, (214), 126 states have call predecessors, (214), 126 states have return successors, (214), 205 states have call predecessors, (214), 214 states have call successors, (214) [2021-11-21 00:39:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4923 transitions. [2021-11-21 00:39:30,917 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4923 transitions. Word has length 101 [2021-11-21 00:39:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:30,918 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 4923 transitions. [2021-11-21 00:39:30,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4923 transitions. [2021-11-21 00:39:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:39:30,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:30,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:39:30,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:31,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:39:31,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1341910872, now seen corresponding path program 2 times [2021-11-21 00:39:31,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:31,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168289244] [2021-11-21 00:39:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:31,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:39:31,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168289244] [2021-11-21 00:39:31,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168289244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155729802] [2021-11-21 00:39:31,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:39:31,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:31,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:31,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:31,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:39:31,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:39:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:39:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:39:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:39:31,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:39:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 00:39:32,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155729802] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:32,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:39:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2021-11-21 00:39:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079719760] [2021-11-21 00:39:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:39:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:39:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:39:32,289 INFO L87 Difference]: Start difference. First operand 2927 states and 4923 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:32,943 INFO L93 Difference]: Finished difference Result 4210 states and 6617 transitions. [2021-11-21 00:39:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:39:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-21 00:39:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:32,966 INFO L225 Difference]: With dead ends: 4210 [2021-11-21 00:39:32,967 INFO L226 Difference]: Without dead ends: 3319 [2021-11-21 00:39:32,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:39:32,972 INFO L933 BasicCegarLoop]: 3171 mSDtfsCounter, 3356 mSDsluCounter, 3390 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 6327 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:32,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3356 Valid, 6327 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:39:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-11-21 00:39:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3255. [2021-11-21 00:39:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2877 states have (on average 1.686131386861314) internal successors, (4851), 2888 states have internal predecessors, (4851), 220 states have call successors, (220), 156 states have call predecessors, (220), 156 states have return successors, (236), 211 states have call predecessors, (236), 220 states have call successors, (236) [2021-11-21 00:39:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5307 transitions. [2021-11-21 00:39:33,156 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5307 transitions. Word has length 101 [2021-11-21 00:39:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:33,157 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 5307 transitions. [2021-11-21 00:39:33,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5307 transitions. [2021-11-21 00:39:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:39:33,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:33,164 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:33,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash -821072776, now seen corresponding path program 1 times [2021-11-21 00:39:33,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480046152] [2021-11-21 00:39:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:39:33,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480046152] [2021-11-21 00:39:33,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480046152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:33,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512007319] [2021-11-21 00:39:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:33,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:33,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:33,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:39:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:39:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:39:33,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:33,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512007319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:33,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:33,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 00:39:33,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069477453] [2021-11-21 00:39:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:33,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:33,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:33,796 INFO L87 Difference]: Start difference. First operand 3255 states and 5307 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:34,375 INFO L93 Difference]: Finished difference Result 4699 states and 7181 transitions. [2021-11-21 00:39:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2021-11-21 00:39:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:34,401 INFO L225 Difference]: With dead ends: 4699 [2021-11-21 00:39:34,401 INFO L226 Difference]: Without dead ends: 3582 [2021-11-21 00:39:34,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:34,407 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 43 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6324 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:34,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 6324 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2021-11-21 00:39:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3392. [2021-11-21 00:39:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 2990 states have (on average 1.6755852842809364) internal successors, (5010), 3001 states have internal predecessors, (5010), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2021-11-21 00:39:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5490 transitions. [2021-11-21 00:39:34,603 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5490 transitions. Word has length 100 [2021-11-21 00:39:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:34,604 INFO L470 AbstractCegarLoop]: Abstraction has 3392 states and 5490 transitions. [2021-11-21 00:39:34,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5490 transitions. [2021-11-21 00:39:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:39:34,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:34,610 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:34,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:34,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:34,824 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash 244060936, now seen corresponding path program 2 times [2021-11-21 00:39:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:34,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513979282] [2021-11-21 00:39:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:34,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:39:34,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513979282] [2021-11-21 00:39:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513979282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566927797] [2021-11-21 00:39:34,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:39:34,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:34,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:34,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:34,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:39:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:39:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:39:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:39:35,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:39:35,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566927797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:35,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:35,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:39:35,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34292904] [2021-11-21 00:39:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:35,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:35,164 INFO L87 Difference]: Start difference. First operand 3392 states and 5490 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:35,789 INFO L93 Difference]: Finished difference Result 4654 states and 7185 transitions. [2021-11-21 00:39:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-21 00:39:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:35,803 INFO L225 Difference]: With dead ends: 4654 [2021-11-21 00:39:35,803 INFO L226 Difference]: Without dead ends: 3400 [2021-11-21 00:39:35,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:35,808 INFO L933 BasicCegarLoop]: 3193 mSDtfsCounter, 84 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:35,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 6325 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-11-21 00:39:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3380. [2021-11-21 00:39:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2978 states have (on average 1.6601746138347884) internal successors, (4944), 2989 states have internal predecessors, (4944), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2021-11-21 00:39:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5424 transitions. [2021-11-21 00:39:35,961 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5424 transitions. Word has length 100 [2021-11-21 00:39:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:35,961 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5424 transitions. [2021-11-21 00:39:35,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5424 transitions. [2021-11-21 00:39:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:39:35,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:35,967 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:36,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:39:36,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -685297560, now seen corresponding path program 1 times [2021-11-21 00:39:36,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493525969] [2021-11-21 00:39:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:36,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:39:36,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:36,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493525969] [2021-11-21 00:39:36,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493525969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:36,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549871938] [2021-11-21 00:39:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:36,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:36,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:36,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:36,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:39:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:39:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:39:36,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:36,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549871938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:36,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:36,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:39:36,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864313700] [2021-11-21 00:39:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:36,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:36,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:36,539 INFO L87 Difference]: Start difference. First operand 3380 states and 5424 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:37,050 INFO L93 Difference]: Finished difference Result 4822 states and 7231 transitions. [2021-11-21 00:39:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-21 00:39:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:37,066 INFO L225 Difference]: With dead ends: 4822 [2021-11-21 00:39:37,066 INFO L226 Difference]: Without dead ends: 3629 [2021-11-21 00:39:37,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:37,071 INFO L933 BasicCegarLoop]: 3148 mSDtfsCounter, 3351 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:37,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3351 Valid, 3166 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:39:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-11-21 00:39:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3629. [2021-11-21 00:39:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3197 states have (on average 1.6158898967782296) internal successors, (5166), 3208 states have internal predecessors, (5166), 238 states have call successors, (238), 192 states have call predecessors, (238), 192 states have return successors, (254), 229 states have call predecessors, (254), 238 states have call successors, (254) [2021-11-21 00:39:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5658 transitions. [2021-11-21 00:39:37,250 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5658 transitions. Word has length 100 [2021-11-21 00:39:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:37,251 INFO L470 AbstractCegarLoop]: Abstraction has 3629 states and 5658 transitions. [2021-11-21 00:39:37,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5658 transitions. [2021-11-21 00:39:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:39:37,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:37,257 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:37,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:37,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:37,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2004533355, now seen corresponding path program 1 times [2021-11-21 00:39:37,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:37,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576247627] [2021-11-21 00:39:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:37,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:39:37,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576247627] [2021-11-21 00:39:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576247627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060313698] [2021-11-21 00:39:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:37,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:37,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:37,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:39:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:39:37,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:39:37,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:37,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060313698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:37,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:37,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:39:37,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618646454] [2021-11-21 00:39:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:37,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:37,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:37,824 INFO L87 Difference]: Start difference. First operand 3629 states and 5658 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:38,353 INFO L93 Difference]: Finished difference Result 4993 states and 7391 transitions. [2021-11-21 00:39:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2021-11-21 00:39:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:38,366 INFO L225 Difference]: With dead ends: 4993 [2021-11-21 00:39:38,366 INFO L226 Difference]: Without dead ends: 3613 [2021-11-21 00:39:38,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:38,372 INFO L933 BasicCegarLoop]: 3201 mSDtfsCounter, 71 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:38,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6332 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-11-21 00:39:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3593. [2021-11-21 00:39:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3165 states have (on average 1.6018957345971565) internal successors, (5070), 3172 states have internal predecessors, (5070), 238 states have call successors, (238), 192 states have call predecessors, (238), 188 states have return successors, (250), 229 states have call predecessors, (250), 238 states have call successors, (250) [2021-11-21 00:39:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5558 transitions. [2021-11-21 00:39:38,546 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5558 transitions. Word has length 100 [2021-11-21 00:39:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:38,547 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 5558 transitions. [2021-11-21 00:39:38,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:39:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5558 transitions. [2021-11-21 00:39:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:39:38,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:38,553 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:38,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:38,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:39:38,779 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1198655805, now seen corresponding path program 1 times [2021-11-21 00:39:38,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723835930] [2021-11-21 00:39:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:38,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:39:38,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723835930] [2021-11-21 00:39:38,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723835930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857172096] [2021-11-21 00:39:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:38,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:38,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:38,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:39:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:38,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:39:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:39:39,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857172096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:39,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:39:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732651315] [2021-11-21 00:39:39,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:39,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:39,181 INFO L87 Difference]: Start difference. First operand 3593 states and 5558 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), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:39,735 INFO L93 Difference]: Finished difference Result 6244 states and 8732 transitions. [2021-11-21 00:39:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:39,736 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), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-21 00:39:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:39,751 INFO L225 Difference]: With dead ends: 6244 [2021-11-21 00:39:39,751 INFO L226 Difference]: Without dead ends: 4298 [2021-11-21 00:39:39,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:39,758 INFO L933 BasicCegarLoop]: 3160 mSDtfsCounter, 39 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:39,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 6294 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:39:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-11-21 00:39:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3781. [2021-11-21 00:39:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3317 states have (on average 1.587579137775098) internal successors, (5266), 3325 states have internal predecessors, (5266), 256 states have call successors, (256), 210 states have call predecessors, (256), 206 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2021-11-21 00:39:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5790 transitions. [2021-11-21 00:39:40,073 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5790 transitions. Word has length 101 [2021-11-21 00:39:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 3781 states and 5790 transitions. [2021-11-21 00:39:40,074 INFO L471 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), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5790 transitions. [2021-11-21 00:39:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 00:39:40,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:40,081 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:40,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:40,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:39:40,299 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -891248746, now seen corresponding path program 1 times [2021-11-21 00:39:40,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236042898] [2021-11-21 00:39:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:40,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:39:40,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236042898] [2021-11-21 00:39:40,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236042898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402482719] [2021-11-21 00:39:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:40,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:40,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:40,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:39:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:39:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:39:40,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:40,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402482719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:40,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:40,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-21 00:39:40,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031523764] [2021-11-21 00:39:40,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:40,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:39:40,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:39:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:40,756 INFO L87 Difference]: Start difference. First operand 3781 states and 5790 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 00:39:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:41,302 INFO L93 Difference]: Finished difference Result 5455 states and 7797 transitions. [2021-11-21 00:39:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:39:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2021-11-21 00:39:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:41,319 INFO L225 Difference]: With dead ends: 5455 [2021-11-21 00:39:41,319 INFO L226 Difference]: Without dead ends: 4358 [2021-11-21 00:39:41,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:41,324 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 6654 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6654 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:41,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6654 Valid, 3273 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:39:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-11-21 00:39:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4037. [2021-11-21 00:39:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 3538 states have (on average 1.5542679479932164) internal successors, (5499), 3552 states have internal predecessors, (5499), 268 states have call successors, (268), 229 states have call predecessors, (268), 229 states have return successors, (285), 256 states have call predecessors, (285), 268 states have call successors, (285) [2021-11-21 00:39:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 6052 transitions. [2021-11-21 00:39:41,533 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 6052 transitions. Word has length 102 [2021-11-21 00:39:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:41,533 INFO L470 AbstractCegarLoop]: Abstraction has 4037 states and 6052 transitions. [2021-11-21 00:39:41,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 00:39:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 6052 transitions. [2021-11-21 00:39:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:39:41,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:41,542 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:41,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:41,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:41,763 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 586286406, now seen corresponding path program 1 times [2021-11-21 00:39:41,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:41,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138928643] [2021-11-21 00:39:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:41,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:39:41,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:41,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138928643] [2021-11-21 00:39:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138928643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:41,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:39:41,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066808319] [2021-11-21 00:39:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:41,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:39:41,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:39:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:39:41,851 INFO L87 Difference]: Start difference. First operand 4037 states and 6052 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:42,798 INFO L93 Difference]: Finished difference Result 6219 states and 8611 transitions. [2021-11-21 00:39:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:39:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-21 00:39:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:42,815 INFO L225 Difference]: With dead ends: 6219 [2021-11-21 00:39:42,815 INFO L226 Difference]: Without dead ends: 4913 [2021-11-21 00:39:42,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:39:42,821 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 74 mSDsluCounter, 10056 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 12560 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:42,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 12560 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:39:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-11-21 00:39:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4811. [2021-11-21 00:39:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4125 states have (on average 1.4926060606060607) internal successors, (6157), 4150 states have internal predecessors, (6157), 368 states have call successors, (368), 311 states have call predecessors, (368), 316 states have return successors, (419), 350 states have call predecessors, (419), 368 states have call successors, (419) [2021-11-21 00:39:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6944 transitions. [2021-11-21 00:39:43,072 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6944 transitions. Word has length 103 [2021-11-21 00:39:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:43,072 INFO L470 AbstractCegarLoop]: Abstraction has 4811 states and 6944 transitions. [2021-11-21 00:39:43,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:39:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6944 transitions. [2021-11-21 00:39:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:39:43,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:43,080 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:39:43,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:39:43,081 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1310804980, now seen corresponding path program 1 times [2021-11-21 00:39:43,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224945507] [2021-11-21 00:39:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:43,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:39:43,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224945507] [2021-11-21 00:39:43,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224945507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953491535] [2021-11-21 00:39:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:43,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:43,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:43,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:39:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:39:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:43,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:39:43,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953491535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:43,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:39:43,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-21 00:39:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839133362] [2021-11-21 00:39:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:39:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:39:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:39:43,514 INFO L87 Difference]: Start difference. First operand 4811 states and 6944 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:39:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:44,468 INFO L93 Difference]: Finished difference Result 7904 states and 10557 transitions. [2021-11-21 00:39:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:39:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2021-11-21 00:39:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:44,489 INFO L225 Difference]: With dead ends: 7904 [2021-11-21 00:39:44,489 INFO L226 Difference]: Without dead ends: 5713 [2021-11-21 00:39:44,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:39:44,498 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 159 mSDsluCounter, 9981 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 12504 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:44,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 12504 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:39:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-11-21 00:39:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5463. [2021-11-21 00:39:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 4630 states have (on average 1.451403887688985) internal successors, (6720), 4658 states have internal predecessors, (6720), 452 states have call successors, (452), 377 states have call predecessors, (452), 379 states have return successors, (524), 428 states have call predecessors, (524), 452 states have call successors, (524) [2021-11-21 00:39:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7696 transitions. [2021-11-21 00:39:44,892 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7696 transitions. Word has length 103 [2021-11-21 00:39:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:44,893 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 7696 transitions. [2021-11-21 00:39:44,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:39:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7696 transitions. [2021-11-21 00:39:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 00:39:44,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:44,901 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:44,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:39:45,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263765, now seen corresponding path program 1 times [2021-11-21 00:39:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286176045] [2021-11-21 00:39:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:45,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:39:45,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286176045] [2021-11-21 00:39:45,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286176045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869080193] [2021-11-21 00:39:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:45,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:45,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:39:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:39:45,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:39:45,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:39:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-21 00:39:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869080193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:39:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264444068] [2021-11-21 00:39:46,190 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-21 00:39:46,190 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:39:46,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:39:46,201 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:39:46,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:00,968 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 88 for LOIs [2021-11-21 00:42:01,584 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 209 for LOIs [2021-11-21 00:42:24,375 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 185 for LOIs [2021-11-21 00:42:25,709 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 88 for LOIs [2021-11-21 00:42:26,449 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2021-11-21 00:42:29,867 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 79 for LOIs [2021-11-21 00:42:41,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:56,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1264444068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:56,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:42:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [13, 8, 6] total 64 [2021-11-21 00:42:56,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568847601] [2021-11-21 00:42:56,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:56,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 00:42:56,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:56,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 00:42:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 00:42:56,875 INFO L87 Difference]: Start difference. First operand 5463 states and 7696 transitions. Second operand has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-21 00:44:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:44:59,373 INFO L93 Difference]: Finished difference Result 8990 states and 11782 transitions. [2021-11-21 00:44:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-21 00:44:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 109 [2021-11-21 00:44:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:44:59,392 INFO L225 Difference]: With dead ends: 8990 [2021-11-21 00:44:59,392 INFO L226 Difference]: Without dead ends: 5502 [2021-11-21 00:44:59,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 272 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9944 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=1952, Invalid=23808, Unknown=0, NotChecked=0, Total=25760 [2021-11-21 00:44:59,408 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 432 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 65873 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 66130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 65873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:44:59,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 4537 Invalid, 66130 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [257 Valid, 65873 Invalid, 0 Unknown, 0 Unchecked, 66.8s Time] [2021-11-21 00:44:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-11-21 00:44:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5435. [2021-11-21 00:44:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5435 states, 4607 states have (on average 1.4512698068157153) internal successors, (6686), 4634 states have internal predecessors, (6686), 448 states have call successors, (448), 376 states have call predecessors, (448), 378 states have return successors, (520), 425 states have call predecessors, (520), 448 states have call successors, (520) [2021-11-21 00:44:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 7654 transitions. [2021-11-21 00:44:59,736 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 7654 transitions. Word has length 109 [2021-11-21 00:44:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:44:59,737 INFO L470 AbstractCegarLoop]: Abstraction has 5435 states and 7654 transitions. [2021-11-21 00:44:59,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-21 00:44:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 7654 transitions. [2021-11-21 00:44:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-21 00:44:59,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:44:59,745 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:44:59,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:44:59,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:44:59,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:44:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:44:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 376093620, now seen corresponding path program 1 times [2021-11-21 00:44:59,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:44:59,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644174964] [2021-11-21 00:44:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:59,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:44:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:45:00,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644174964] [2021-11-21 00:45:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644174964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846386376] [2021-11-21 00:45:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:00,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:00,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:00,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:45:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:45:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:45:00,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-21 00:45:00,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846386376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:00,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381112406] [2021-11-21 00:45:00,902 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-21 00:45:00,902 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:00,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:00,903 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:00,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:27,860 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 180 for LOIs [2021-11-21 00:47:30,640 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:47:30,662 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:47:32,221 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 210 for LOIs [2021-11-21 00:47:34,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:47:34,884 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:47:36,373 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 185 for LOIs [2021-11-21 00:47:37,079 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 109 for LOIs [2021-11-21 00:47:37,377 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2021-11-21 00:47:38,850 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 88 for LOIs [2021-11-21 00:47:52,833 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1381112406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:11,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:48:11,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [13, 8, 6] total 65 [2021-11-21 00:48:11,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22257188] [2021-11-21 00:48:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 00:48:11,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 00:48:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2021-11-21 00:48:11,649 INFO L87 Difference]: Start difference. First operand 5435 states and 7654 transitions. Second operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 34 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-21 00:50:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:08,646 INFO L93 Difference]: Finished difference Result 8804 states and 11574 transitions. [2021-11-21 00:50:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-21 00:50:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 34 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 111 [2021-11-21 00:50:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:08,667 INFO L225 Difference]: With dead ends: 8804 [2021-11-21 00:50:08,667 INFO L226 Difference]: Without dead ends: 5904 [2021-11-21 00:50:08,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 273 SyntacticMatches, 14 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8358 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=1594, Invalid=19868, Unknown=0, NotChecked=0, Total=21462 [2021-11-21 00:50:08,686 INFO L933 BasicCegarLoop]: 3164 mSDtfsCounter, 394 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 62191 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 62393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 62191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 4405 Invalid, 62393 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [202 Valid, 62191 Invalid, 0 Unknown, 0 Unchecked, 76.3s Time] [2021-11-21 00:50:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2021-11-21 00:50:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5773. [2021-11-21 00:50:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 4858 states have (on average 1.4343351173322354) internal successors, (6968), 4895 states have internal predecessors, (6968), 494 states have call successors, (494), 410 states have call predecessors, (494), 419 states have return successors, (580), 468 states have call predecessors, (580), 494 states have call successors, (580) [2021-11-21 00:50:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 8042 transitions. [2021-11-21 00:50:09,256 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 8042 transitions. Word has length 111 [2021-11-21 00:50:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:09,257 INFO L470 AbstractCegarLoop]: Abstraction has 5773 states and 8042 transitions. [2021-11-21 00:50:09,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 34 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-21 00:50:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 8042 transitions. [2021-11-21 00:50:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-21 00:50:09,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:09,268 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:09,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:09,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:50:09,495 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1469102785, now seen corresponding path program 1 times [2021-11-21 00:50:09,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632167142] [2021-11-21 00:50:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:09,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:50:09,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632167142] [2021-11-21 00:50:09,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632167142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328089818] [2021-11-21 00:50:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:09,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:09,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:09,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:09,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a0dfb4-1620-4b0b-b97c-68b8d69e74d8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:50:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:50:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:50:10,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-21 00:50:10,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328089818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607734859] [2021-11-21 00:50:10,658 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-21 00:50:10,659 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:50:10,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:50:10,660 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:50:10,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs