./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:09:26,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:09:26,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:09:26,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:09:26,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:09:26,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:09:26,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:09:26,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:09:26,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:09:26,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:09:26,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:09:26,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:09:26,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:09:26,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:09:26,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:09:26,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:09:26,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:09:26,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:09:26,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:09:26,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:09:26,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:09:26,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:09:26,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:09:26,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:09:26,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:09:26,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:09:26,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:09:26,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:09:26,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:09:26,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:09:26,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:09:26,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:09:26,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:09:26,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:09:26,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:09:26,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:09:26,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:09:26,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:09:26,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:09:26,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:09:26,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:09:26,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:09:26,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:09:26,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:09:26,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:09:26,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:09:26,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:09:26,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:09:26,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:09:26,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:09:26,999 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:09:26,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:09:26,999 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:09:26,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:09:26,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:09:27,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:09:27,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:09:27,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:09:27,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:09:27,000 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:09:27,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:09:27,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:09:27,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:09:27,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:09:27,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:09:27,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:09:27,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:09:27,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:09:27,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:09:27,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:09:27,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:09:27,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:09:27,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:09:27,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:09:27,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:09:27,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:09:27,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:09:27,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:09:27,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 [2022-11-26 00:09:27,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:09:27,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:09:27,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:09:27,348 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:09:27,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:09:27,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/systemc/token_ring.15.cil.c [2022-11-26 00:09:30,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:09:30,799 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:09:30,804 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/sv-benchmarks/c/systemc/token_ring.15.cil.c [2022-11-26 00:09:30,823 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/data/1354c988f/0bfba996b7004bc19e278afbd9ea4411/FLAG2245669bf [2022-11-26 00:09:30,871 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/data/1354c988f/0bfba996b7004bc19e278afbd9ea4411 [2022-11-26 00:09:30,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:09:30,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:09:30,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:09:30,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:09:30,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:09:30,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:09:30" (1/1) ... [2022-11-26 00:09:30,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59042ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:30, skipping insertion in model container [2022-11-26 00:09:30,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:09:30" (1/1) ... [2022-11-26 00:09:30,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:09:30,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:09:31,116 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2022-11-26 00:09:31,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:09:31,311 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:09:31,331 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2022-11-26 00:09:31,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:09:31,433 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:09:31,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31 WrapperNode [2022-11-26 00:09:31,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:09:31,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:09:31,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:09:31,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:09:31,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,546 INFO L138 Inliner]: procedures = 54, calls = 71, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 914 [2022-11-26 00:09:31,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:09:31,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:09:31,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:09:31,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:09:31,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:09:31,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:09:31,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:09:31,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:09:31,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (1/1) ... [2022-11-26 00:09:31,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:09:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:31,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:09:31,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:09:31,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:09:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:09:31,712 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:09:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 00:09:31,712 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 00:09:31,712 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:09:31,712 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:09:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-26 00:09:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-26 00:09:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:09:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:09:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:09:31,714 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:09:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:09:31,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:09:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:09:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:09:31,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:09:31,911 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:09:31,929 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:09:33,003 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:09:33,610 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:09:33,610 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-26 00:09:33,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:09:33 BoogieIcfgContainer [2022-11-26 00:09:33,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:09:33,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:09:33,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:09:33,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:09:33,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:09:30" (1/3) ... [2022-11-26 00:09:33,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f202a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:09:33, skipping insertion in model container [2022-11-26 00:09:33,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:09:31" (2/3) ... [2022-11-26 00:09:33,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f202a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:09:33, skipping insertion in model container [2022-11-26 00:09:33,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:09:33" (3/3) ... [2022-11-26 00:09:33,628 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.15.cil.c [2022-11-26 00:09:33,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:09:33,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:09:33,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:09:33,737 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3352a614, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:09:33,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:09:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 167 states have (on average 1.5688622754491017) internal successors, (262), 171 states have internal predecessors, (262), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 00:09:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:09:33,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:33,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:33,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash 801565801, now seen corresponding path program 1 times [2022-11-26 00:09:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:33,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655876180] [2022-11-26 00:09:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:33,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:34,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655876180] [2022-11-26 00:09:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655876180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:34,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:09:34,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:09:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86603113] [2022-11-26 00:09:34,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:34,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:09:34,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:09:34,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:34,450 INFO L87 Difference]: Start difference. First operand has 205 states, 167 states have (on average 1.5688622754491017) internal successors, (262), 171 states have internal predecessors, (262), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:09:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:35,099 INFO L93 Difference]: Finished difference Result 592 states and 943 transitions. [2022-11-26 00:09:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:09:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-26 00:09:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:35,114 INFO L225 Difference]: With dead ends: 592 [2022-11-26 00:09:35,114 INFO L226 Difference]: Without dead ends: 388 [2022-11-26 00:09:35,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:35,122 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 553 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:35,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 880 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:09:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-26 00:09:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2022-11-26 00:09:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 322 states have (on average 1.5341614906832297) internal successors, (494), 325 states have internal predecessors, (494), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-26 00:09:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 596 transitions. [2022-11-26 00:09:35,257 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 596 transitions. Word has length 70 [2022-11-26 00:09:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:35,258 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 596 transitions. [2022-11-26 00:09:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:09:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 596 transitions. [2022-11-26 00:09:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:35,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:35,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:09:35,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1706203696, now seen corresponding path program 1 times [2022-11-26 00:09:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989240687] [2022-11-26 00:09:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:09:35,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:35,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989240687] [2022-11-26 00:09:35,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989240687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:35,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429650448] [2022-11-26 00:09:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:35,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:35,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:35,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:09:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:09:36,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:36,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429650448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:36,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:36,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-26 00:09:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913484936] [2022-11-26 00:09:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:36,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:36,050 INFO L87 Difference]: Start difference. First operand 387 states and 596 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:36,256 INFO L93 Difference]: Finished difference Result 1144 states and 1793 transitions. [2022-11-26 00:09:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:36,284 INFO L225 Difference]: With dead ends: 1144 [2022-11-26 00:09:36,285 INFO L226 Difference]: Without dead ends: 762 [2022-11-26 00:09:36,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:36,288 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 285 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:36,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 570 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-26 00:09:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 756. [2022-11-26 00:09:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 635 states have (on average 1.5322834645669292) internal successors, (973), 639 states have internal predecessors, (973), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:09:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1163 transitions. [2022-11-26 00:09:36,339 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1163 transitions. Word has length 143 [2022-11-26 00:09:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:36,340 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1163 transitions. [2022-11-26 00:09:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1163 transitions. [2022-11-26 00:09:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:36,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:36,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:36,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:36,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -278678802, now seen corresponding path program 1 times [2022-11-26 00:09:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273949783] [2022-11-26 00:09:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:09:36,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273949783] [2022-11-26 00:09:36,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273949783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:36,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871694993] [2022-11-26 00:09:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:36,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:36,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:36,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:09:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:09:37,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:37,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871694993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:37,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-26 00:09:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271463112] [2022-11-26 00:09:37,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:37,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:37,126 INFO L87 Difference]: Start difference. First operand 756 states and 1163 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:37,393 INFO L93 Difference]: Finished difference Result 2245 states and 3514 transitions. [2022-11-26 00:09:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:37,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:37,410 INFO L225 Difference]: With dead ends: 2245 [2022-11-26 00:09:37,411 INFO L226 Difference]: Without dead ends: 1494 [2022-11-26 00:09:37,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:37,417 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 261 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:37,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:09:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-26 00:09:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1486. [2022-11-26 00:09:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1255 states have (on average 1.5290836653386455) internal successors, (1919), 1261 states have internal predecessors, (1919), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-26 00:09:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2281 transitions. [2022-11-26 00:09:37,539 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2281 transitions. Word has length 143 [2022-11-26 00:09:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:37,540 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2281 transitions. [2022-11-26 00:09:37,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2281 transitions. [2022-11-26 00:09:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:37,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:37,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:37,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:09:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:37,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -881744468, now seen corresponding path program 1 times [2022-11-26 00:09:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672049024] [2022-11-26 00:09:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:37,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:09:37,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672049024] [2022-11-26 00:09:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672049024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024949925] [2022-11-26 00:09:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:37,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:37,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:37,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:09:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:38,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:09:38,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:38,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024949925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:38,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:38,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-26 00:09:38,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166994017] [2022-11-26 00:09:38,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:38,251 INFO L87 Difference]: Start difference. First operand 1486 states and 2281 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:38,549 INFO L93 Difference]: Finished difference Result 4423 states and 6906 transitions. [2022-11-26 00:09:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:38,565 INFO L225 Difference]: With dead ends: 4423 [2022-11-26 00:09:38,566 INFO L226 Difference]: Without dead ends: 2942 [2022-11-26 00:09:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:38,578 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 288 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:38,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-11-26 00:09:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2930. [2022-11-26 00:09:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2930 states, 2483 states have (on average 1.5251711639146195) internal successors, (3787), 2493 states have internal predecessors, (3787), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-26 00:09:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4485 transitions. [2022-11-26 00:09:38,770 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4485 transitions. Word has length 143 [2022-11-26 00:09:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:38,771 INFO L495 AbstractCegarLoop]: Abstraction has 2930 states and 4485 transitions. [2022-11-26 00:09:38,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4485 transitions. [2022-11-26 00:09:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:38,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:38,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:38,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:38,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:38,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash 593488942, now seen corresponding path program 1 times [2022-11-26 00:09:38,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:38,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92794366] [2022-11-26 00:09:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:09:39,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92794366] [2022-11-26 00:09:39,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92794366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344050465] [2022-11-26 00:09:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:39,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:39,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:39,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:09:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:09:39,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344050465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:39,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:39,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-26 00:09:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638414066] [2022-11-26 00:09:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:39,506 INFO L87 Difference]: Start difference. First operand 2930 states and 4485 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:39,891 INFO L93 Difference]: Finished difference Result 8731 states and 13590 transitions. [2022-11-26 00:09:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:39,927 INFO L225 Difference]: With dead ends: 8731 [2022-11-26 00:09:39,927 INFO L226 Difference]: Without dead ends: 5806 [2022-11-26 00:09:39,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:39,941 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 267 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:39,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-11-26 00:09:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5786. [2022-11-26 00:09:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 4915 states have (on average 1.520854526958291) internal successors, (7475), 4933 states have internal predecessors, (7475), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-26 00:09:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 8829 transitions. [2022-11-26 00:09:40,388 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 8829 transitions. Word has length 143 [2022-11-26 00:09:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:40,388 INFO L495 AbstractCegarLoop]: Abstraction has 5786 states and 8829 transitions. [2022-11-26 00:09:40,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 8829 transitions. [2022-11-26 00:09:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:40,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:40,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:40,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:40,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:40,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -393193364, now seen corresponding path program 1 times [2022-11-26 00:09:40,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:40,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628329319] [2022-11-26 00:09:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:09:40,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628329319] [2022-11-26 00:09:40,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628329319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326012669] [2022-11-26 00:09:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:40,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:40,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:40,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:09:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:09:41,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:41,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326012669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:41,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:41,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-26 00:09:41,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533798899] [2022-11-26 00:09:41,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:41,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:41,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:41,123 INFO L87 Difference]: Start difference. First operand 5786 states and 8829 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:41,716 INFO L93 Difference]: Finished difference Result 17251 states and 26758 transitions. [2022-11-26 00:09:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:41,779 INFO L225 Difference]: With dead ends: 17251 [2022-11-26 00:09:41,779 INFO L226 Difference]: Without dead ends: 11470 [2022-11-26 00:09:41,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:41,805 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 279 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:41,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:09:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2022-11-26 00:09:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11434. [2022-11-26 00:09:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11434 states, 9731 states have (on average 1.51628815126914) internal successors, (14755), 9765 states have internal predecessors, (14755), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-26 00:09:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 17389 transitions. [2022-11-26 00:09:42,574 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 17389 transitions. Word has length 143 [2022-11-26 00:09:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:42,574 INFO L495 AbstractCegarLoop]: Abstraction has 11434 states and 17389 transitions. [2022-11-26 00:09:42,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 17389 transitions. [2022-11-26 00:09:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:42,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:42,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:42,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:09:42,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:09:42,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1882871722, now seen corresponding path program 1 times [2022-11-26 00:09:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:42,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981163291] [2022-11-26 00:09:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:09:42,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981163291] [2022-11-26 00:09:42,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981163291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52797580] [2022-11-26 00:09:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:42,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:42,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:43,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:09:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:43,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:09:43,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:43,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52797580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:43,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:43,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-26 00:09:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262412886] [2022-11-26 00:09:43,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:43,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:43,349 INFO L87 Difference]: Start difference. First operand 11434 states and 17389 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:44,402 INFO L93 Difference]: Finished difference Result 34099 states and 52694 transitions. [2022-11-26 00:09:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:44,525 INFO L225 Difference]: With dead ends: 34099 [2022-11-26 00:09:44,525 INFO L226 Difference]: Without dead ends: 22670 [2022-11-26 00:09:44,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:44,569 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 258 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:44,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22670 states. [2022-11-26 00:09:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22670 to 22602. [2022-11-26 00:09:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22602 states, 19267 states have (on average 1.5115482431099807) internal successors, (29123), 19333 states have internal predecessors, (29123), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-26 00:09:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22602 states to 22602 states and 34253 transitions. [2022-11-26 00:09:45,945 INFO L78 Accepts]: Start accepts. Automaton has 22602 states and 34253 transitions. Word has length 143 [2022-11-26 00:09:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:45,945 INFO L495 AbstractCegarLoop]: Abstraction has 22602 states and 34253 transitions. [2022-11-26 00:09:45,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22602 states and 34253 transitions. [2022-11-26 00:09:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:45,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:45,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:45,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:09:46,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1146719660, now seen corresponding path program 1 times [2022-11-26 00:09:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861277896] [2022-11-26 00:09:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:09:46,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861277896] [2022-11-26 00:09:46,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861277896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357720086] [2022-11-26 00:09:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:46,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:46,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:46,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:09:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:09:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:09:46,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:46,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357720086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:46,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:46,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-26 00:09:46,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870846096] [2022-11-26 00:09:46,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:46,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:09:46,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:09:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:46,677 INFO L87 Difference]: Start difference. First operand 22602 states and 34253 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:48,463 INFO L93 Difference]: Finished difference Result 67411 states and 103766 transitions. [2022-11-26 00:09:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:09:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-26 00:09:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:48,651 INFO L225 Difference]: With dead ends: 67411 [2022-11-26 00:09:48,651 INFO L226 Difference]: Without dead ends: 44814 [2022-11-26 00:09:48,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:48,728 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 273 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:48,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44814 states. [2022-11-26 00:09:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44814 to 44682. [2022-11-26 00:09:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44682 states, 38147 states have (on average 1.5066715600178258) internal successors, (57475), 38277 states have internal predecessors, (57475), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-26 00:09:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44682 states to 44682 states and 67469 transitions. [2022-11-26 00:09:51,754 INFO L78 Accepts]: Start accepts. Automaton has 44682 states and 67469 transitions. Word has length 143 [2022-11-26 00:09:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:51,755 INFO L495 AbstractCegarLoop]: Abstraction has 44682 states and 67469 transitions. [2022-11-26 00:09:51,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:09:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44682 states and 67469 transitions. [2022-11-26 00:09:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:09:51,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:51,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:51,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:52,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73137d84-3c95-409d-924d-d290fb6b5cf2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:52,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1447777130, now seen corresponding path program 1 times [2022-11-26 00:09:52,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:52,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346455416] [2022-11-26 00:09:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-26 00:09:53,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346455416] [2022-11-26 00:09:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346455416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:53,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:09:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:09:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841494731] [2022-11-26 00:09:53,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:53,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:09:53,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:09:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:09:53,015 INFO L87 Difference]: Start difference. First operand 44682 states and 67469 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:09:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:57,812 INFO L93 Difference]: Finished difference Result 156818 states and 236308 transitions. [2022-11-26 00:09:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:09:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-26 00:09:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:58,781 INFO L225 Difference]: With dead ends: 156818 [2022-11-26 00:09:58,781 INFO L226 Difference]: Without dead ends: 112142 [2022-11-26 00:09:58,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:09:58,932 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1164 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:58,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 946 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:09:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112142 states. [2022-11-26 00:10:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112142 to 87818. [2022-11-26 00:10:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 75011 states have (on average 1.5016864193251656) internal successors, (112643), 75269 states have internal predecessors, (112643), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-26 00:10:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 132109 transitions. [2022-11-26 00:10:04,471 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 132109 transitions. Word has length 143 [2022-11-26 00:10:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:04,472 INFO L495 AbstractCegarLoop]: Abstraction has 87818 states and 132109 transitions. [2022-11-26 00:10:04,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:10:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 132109 transitions. [2022-11-26 00:10:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-26 00:10:04,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:04,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:10:04,647 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1418472926, now seen corresponding path program 1 times [2022-11-26 00:10:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:04,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270075446] [2022-11-26 00:10:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-26 00:10:05,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:05,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270075446] [2022-11-26 00:10:05,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270075446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:05,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:05,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:10:05,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817122618] [2022-11-26 00:10:05,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:10:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:10:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:10:05,819 INFO L87 Difference]: Start difference. First operand 87818 states and 132109 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:10:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:13,828 INFO L93 Difference]: Finished difference Result 241042 states and 362899 transitions. [2022-11-26 00:10:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:10:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-26 00:10:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:14,681 INFO L225 Difference]: With dead ends: 241042 [2022-11-26 00:10:14,682 INFO L226 Difference]: Without dead ends: 153230 [2022-11-26 00:10:14,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:10:14,929 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1027 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:14,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 1042 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:10:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153230 states.