./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0 --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 64bit --witnessprinter.graph.data.programhash 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d --- 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-e04fb08 [2022-11-16 20:29:04,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:29:04,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:29:04,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:29:04,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:29:04,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:29:04,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:29:04,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:29:04,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:29:04,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:29:04,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:29:04,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:29:04,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:29:04,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:29:04,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:29:04,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:29:04,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:29:04,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:29:04,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:29:04,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:29:04,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:29:04,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:29:04,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:29:04,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:29:04,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:29:04,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:29:04,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:29:04,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:29:04,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:29:04,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:29:04,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:29:04,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:29:04,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:29:04,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:29:04,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:29:04,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:29:04,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:29:04,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:29:04,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:29:04,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:29:04,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:29:04,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:29:04,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:29:04,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:29:04,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:29:04,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:29:04,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:29:04,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:29:04,581 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:29:04,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:29:04,581 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:29:04,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:29:04,582 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:29:04,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:29:04,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:29:04,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:29:04,583 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:29:04,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:29:04,584 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:29:04,584 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:29:04,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:29:04,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:29:04,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:29:04,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:29:04,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:29:04,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:29:04,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:29:04,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:29:04,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:29:04,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:29:04,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:29:04,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:29:04,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:29:04,590 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:29:04,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:29:04,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:29:04,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:29:04,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:29:04,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:29:04,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:29:04,591 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_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d [2022-11-16 20:29:04,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:29:04,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:29:04,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:29:04,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:29:04,968 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:29:04,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-16 20:29:05,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/data/6d7243ce7/1faaf6773db34f9ea5120747bb705bf4/FLAG0043f4ab0 [2022-11-16 20:29:06,207 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:29:06,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-16 20:29:06,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/data/6d7243ce7/1faaf6773db34f9ea5120747bb705bf4/FLAG0043f4ab0 [2022-11-16 20:29:06,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/data/6d7243ce7/1faaf6773db34f9ea5120747bb705bf4 [2022-11-16 20:29:06,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:29:06,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:29:06,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:29:06,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:29:06,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:29:06,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:06" (1/1) ... [2022-11-16 20:29:06,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a19f3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:06, skipping insertion in model container [2022-11-16 20:29:06,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:06" (1/1) ... [2022-11-16 20:29:06,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:29:06,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:29:09,519 WARN L229 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_468b28c0-0722-48cf-b63b-91f94f4ba3e2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2022-11-16 20:29:09,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:29:09,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:29:10,499 WARN L229 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_468b28c0-0722-48cf-b63b-91f94f4ba3e2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2022-11-16 20:29:10,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:29:10,704 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:29:10,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10 WrapperNode [2022-11-16 20:29:10,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:29:10,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:29:10,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:29:10,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:29:10,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:10,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,103 INFO L138 Inliner]: procedures = 356, calls = 3822, calls flagged for inlining = 167, calls inlined = 133, statements flattened = 7434 [2022-11-16 20:29:11,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:29:11,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:29:11,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:29:11,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:29:11,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:29:11,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:29:11,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:29:11,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:29:11,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (1/1) ... [2022-11-16 20:29:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:29:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:11,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:29:11,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:29:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-11-16 20:29:11,764 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-11-16 20:29:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2022-11-16 20:29:11,765 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2022-11-16 20:29:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-16 20:29:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 20:29:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 20:29:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2022-11-16 20:29:11,765 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2022-11-16 20:29:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-16 20:29:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-16 20:29:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-16 20:29:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-16 20:29:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-16 20:29:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-16 20:29:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure set_signals [2022-11-16 20:29:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure set_signals [2022-11-16 20:29:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure irq_test [2022-11-16 20:29:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_test [2022-11-16 20:29:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_dma_bufs [2022-11-16 20:29:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_dma_bufs [2022-11-16 20:29:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_ioctl [2022-11-16 20:29:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_ioctl [2022-11-16 20:29:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 20:29:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 20:29:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure flush_chars [2022-11-16 20:29:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_chars [2022-11-16 20:29:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2022-11-16 20:29:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2022-11-16 20:29:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-16 20:29:11,769 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-16 20:29:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 20:29:11,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 20:29:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure tx_stop [2022-11-16 20:29:11,769 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_stop [2022-11-16 20:29:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure sca_init [2022-11-16 20:29:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure sca_init [2022-11-16 20:29:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-16 20:29:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-16 20:29:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-16 20:29:11,771 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-16 20:29:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 20:29:11,771 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 20:29:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure chars_in_buffer [2022-11-16 20:29:11,772 INFO L138 BoogieDeclarations]: Found implementation of procedure chars_in_buffer [2022-11-16 20:29:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 20:29:11,772 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 20:29:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-11-16 20:29:11,773 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-11-16 20:29:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure change_params [2022-11-16 20:29:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure change_params [2022-11-16 20:29:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2022-11-16 20:29:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2022-11-16 20:29:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-16 20:29:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-16 20:29:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2022-11-16 20:29:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2022-11-16 20:29:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-16 20:29:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-16 20:29:11,776 INFO L130 BoogieDeclarations]: Found specification of procedure set_break [2022-11-16 20:29:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure set_break [2022-11-16 20:29:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure tx_start [2022-11-16 20:29:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_start [2022-11-16 20:29:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:29:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-16 20:29:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure startup [2022-11-16 20:29:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure startup [2022-11-16 20:29:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_frame_bufs [2022-11-16 20:29:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_frame_bufs [2022-11-16 20:29:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure rx_free_frame_buffers [2022-11-16 20:29:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_free_frame_buffers [2022-11-16 20:29:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:29:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure wait_until_sent [2022-11-16 20:29:11,779 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_until_sent [2022-11-16 20:29:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-16 20:29:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-16 20:29:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 20:29:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 20:29:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure synclinkmp_cleanup [2022-11-16 20:29:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure synclinkmp_cleanup [2022-11-16 20:29:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tty_port [2022-11-16 20:29:11,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tty_port [2022-11-16 20:29:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:29:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure dtr_rts [2022-11-16 20:29:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure dtr_rts [2022-11-16 20:29:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-16 20:29:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-16 20:29:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:29:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure set_rate [2022-11-16 20:29:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rate [2022-11-16 20:29:11,784 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-16 20:29:11,784 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-16 20:29:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure ioctl [2022-11-16 20:29:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ioctl [2022-11-16 20:29:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-16 20:29:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-16 20:29:11,785 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-16 20:29:11,785 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-16 20:29:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmset [2022-11-16 20:29:11,786 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmset [2022-11-16 20:29:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-16 20:29:11,786 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-16 20:29:11,786 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2022-11-16 20:29:11,787 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2022-11-16 20:29:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 20:29:11,787 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 20:29:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure rx_stop [2022-11-16 20:29:11,787 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_stop [2022-11-16 20:29:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure loopback_test [2022-11-16 20:29:11,788 INFO L138 BoogieDeclarations]: Found implementation of procedure loopback_test [2022-11-16 20:29:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-16 20:29:11,791 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-16 20:29:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_tx_timeout [2022-11-16 20:29:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_tx_timeout [2022-11-16 20:29:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 20:29:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-16 20:29:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-16 20:29:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-16 20:29:11,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-16 20:29:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 20:29:11,801 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2022-11-16 20:29:11,801 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2022-11-16 20:29:11,801 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hung_up_p [2022-11-16 20:29:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hung_up_p [2022-11-16 20:29:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure release_resources [2022-11-16 20:29:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resources [2022-11-16 20:29:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:29:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-16 20:29:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-16 20:29:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-16 20:29:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-16 20:29:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2022-11-16 20:29:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2022-11-16 20:29:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure tx_set_idle [2022-11-16 20:29:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_set_idle [2022-11-16 20:29:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure set_termios [2022-11-16 20:29:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure set_termios [2022-11-16 20:29:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 20:29:11,804 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 20:29:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure write_room [2022-11-16 20:29:11,804 INFO L138 BoogieDeclarations]: Found implementation of procedure write_room [2022-11-16 20:29:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure enable_loopback [2022-11-16 20:29:11,804 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_loopback [2022-11-16 20:29:11,804 INFO L130 BoogieDeclarations]: Found specification of procedure install [2022-11-16 20:29:11,804 INFO L138 BoogieDeclarations]: Found implementation of procedure install [2022-11-16 20:29:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_destroy [2022-11-16 20:29:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_destroy [2022-11-16 20:29:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-16 20:29:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-16 20:29:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure throttle [2022-11-16 20:29:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure throttle [2022-11-16 20:29:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-16 20:29:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-16 20:29:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 20:29:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 20:29:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_fifo [2022-11-16 20:29:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_fifo [2022-11-16 20:29:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tty_port [2022-11-16 20:29:11,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tty_port [2022-11-16 20:29:11,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:29:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-16 20:29:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-16 20:29:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_dma_buffer [2022-11-16 20:29:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_dma_buffer [2022-11-16 20:29:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure program_hw [2022-11-16 20:29:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure program_hw [2022-11-16 20:29:11,807 INFO L130 BoogieDeclarations]: Found specification of procedure carrier_raised [2022-11-16 20:29:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure carrier_raised [2022-11-16 20:29:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 20:29:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 20:29:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure reset_port [2022-11-16 20:29:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_port [2022-11-16 20:29:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:29:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-16 20:29:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-16 20:29:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:29:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2022-11-16 20:29:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2022-11-16 20:29:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure register_test [2022-11-16 20:29:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure register_test [2022-11-16 20:29:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-16 20:29:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-16 20:29:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:29:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure hangup [2022-11-16 20:29:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure hangup [2022-11-16 20:29:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-16 20:29:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure get_icount [2022-11-16 20:29:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure get_icount [2022-11-16 20:29:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ops_disconnect_1 [2022-11-16 20:29:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ops_disconnect_1 [2022-11-16 20:29:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure write_control_reg [2022-11-16 20:29:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure write_control_reg [2022-11-16 20:29:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2022-11-16 20:29:11,812 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2022-11-16 20:29:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure unthrottle [2022-11-16 20:29:11,812 INFO L138 BoogieDeclarations]: Found implementation of procedure unthrottle [2022-11-16 20:29:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure tx_release [2022-11-16 20:29:11,812 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_release [2022-11-16 20:29:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-16 20:29:11,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-16 20:29:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-16 20:29:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-16 20:29:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_mode [2022-11-16 20:29:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_mode [2022-11-16 20:29:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure rx_get_frame [2022-11-16 20:29:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_get_frame [2022-11-16 20:29:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure shutdown [2022-11-16 20:29:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure shutdown [2022-11-16 20:29:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-16 20:29:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-16 20:29:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure send_xchar [2022-11-16 20:29:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure send_xchar [2022-11-16 20:29:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-16 20:29:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-16 20:29:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmget [2022-11-16 20:29:11,814 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmget [2022-11-16 20:29:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2022-11-16 20:29:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2022-11-16 20:29:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg16 [2022-11-16 20:29:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg16 [2022-11-16 20:29:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-16 20:29:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-16 20:29:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure get_signals [2022-11-16 20:29:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure get_signals [2022-11-16 20:29:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-16 20:29:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-16 20:29:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:29:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-16 20:29:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-16 20:29:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure rx_start [2022-11-16 20:29:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_start [2022-11-16 20:29:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure trace_block [2022-11-16 20:29:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_block [2022-11-16 20:29:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure sanity_check [2022-11-16 20:29:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sanity_check [2022-11-16 20:29:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:29:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:29:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure read_status_reg [2022-11-16 20:29:11,822 INFO L138 BoogieDeclarations]: Found implementation of procedure read_status_reg [2022-11-16 20:29:12,988 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:29:12,994 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:29:47,763 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:29:52,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:29:52,296 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 20:29:52,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:29:52 BoogieIcfgContainer [2022-11-16 20:29:52,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:29:52,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:29:52,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:29:52,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:29:52,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:29:06" (1/3) ... [2022-11-16 20:29:52,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfecff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:29:52, skipping insertion in model container [2022-11-16 20:29:52,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:10" (2/3) ... [2022-11-16 20:29:52,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfecff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:29:52, skipping insertion in model container [2022-11-16 20:29:52,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:29:52" (3/3) ... [2022-11-16 20:29:52,324 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-16 20:29:52,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:29:52,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:29:52,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:29:52,477 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;@62cc3080, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:29:52,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:29:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) [2022-11-16 20:29:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:29:52,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:52,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:52,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:29:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -124487977, now seen corresponding path program 1 times [2022-11-16 20:29:52,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:29:52,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242823025] [2022-11-16 20:29:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:29:52,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:29:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:53,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:29:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242823025] [2022-11-16 20:29:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242823025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:29:53,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:29:53,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:29:53,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984675835] [2022-11-16 20:29:53,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:29:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:29:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:29:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:29:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:29:53,412 INFO L87 Difference]: Start difference. First operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:55,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:29:57,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:29:59,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:02,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:07,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:09,216 INFO L93 Difference]: Finished difference Result 6149 states and 9346 transitions. [2022-11-16 20:30:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 20:30:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:09,285 INFO L225 Difference]: With dead ends: 6149 [2022-11-16 20:30:09,285 INFO L226 Difference]: Without dead ends: 4092 [2022-11-16 20:30:09,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:09,316 INFO L413 NwaCegarLoop]: 3634 mSDtfsCounter, 3075 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 6392 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:09,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3078 Valid, 6392 Invalid, 687 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 3 Unknown, 0 Unchecked, 15.3s Time] [2022-11-16 20:30:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2022-11-16 20:30:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 4088. [2022-11-16 20:30:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 2458 states have (on average 1.3677786818551667) internal successors, (3362), 2562 states have internal predecessors, (3362), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2022-11-16 20:30:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 6181 transitions. [2022-11-16 20:30:09,782 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 6181 transitions. Word has length 16 [2022-11-16 20:30:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:09,784 INFO L495 AbstractCegarLoop]: Abstraction has 4088 states and 6181 transitions. [2022-11-16 20:30:09,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 6181 transitions. [2022-11-16 20:30:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:30:09,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:09,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:30:09,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 434634824, now seen corresponding path program 1 times [2022-11-16 20:30:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:09,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573688894] [2022-11-16 20:30:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:30:10,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:10,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573688894] [2022-11-16 20:30:10,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573688894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:10,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:10,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:30:10,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242190642] [2022-11-16 20:30:10,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:10,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:10,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:10,120 INFO L87 Difference]: Start difference. First operand 4088 states and 6181 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:12,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:14,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:30:19,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:22,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:24,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:25,743 INFO L93 Difference]: Finished difference Result 4096 states and 6188 transitions. [2022-11-16 20:30:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:30:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:25,777 INFO L225 Difference]: With dead ends: 4096 [2022-11-16 20:30:25,778 INFO L226 Difference]: Without dead ends: 4093 [2022-11-16 20:30:25,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:25,783 INFO L413 NwaCegarLoop]: 3644 mSDtfsCounter, 3070 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 6405 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:25,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3073 Valid, 6405 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 4 Unknown, 0 Unchecked, 15.3s Time] [2022-11-16 20:30:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2022-11-16 20:30:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 4089. [2022-11-16 20:30:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 2459 states have (on average 1.3676291175274502) internal successors, (3363), 2563 states have internal predecessors, (3363), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2022-11-16 20:30:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6182 transitions. [2022-11-16 20:30:26,033 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6182 transitions. Word has length 17 [2022-11-16 20:30:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:26,033 INFO L495 AbstractCegarLoop]: Abstraction has 4089 states and 6182 transitions. [2022-11-16 20:30:26,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6182 transitions. [2022-11-16 20:30:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 20:30:26,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:26,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:26,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:30:26,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash 587577338, now seen corresponding path program 1 times [2022-11-16 20:30:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:26,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024260952] [2022-11-16 20:30:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:30:26,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:26,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024260952] [2022-11-16 20:30:26,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024260952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:26,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:26,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:30:26,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184126330] [2022-11-16 20:30:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:26,356 INFO L87 Difference]: Start difference. First operand 4089 states and 6182 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:28,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:30,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:30:35,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:38,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:39,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:41,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:42,563 INFO L93 Difference]: Finished difference Result 4097 states and 6189 transitions. [2022-11-16 20:30:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 20:30:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:42,593 INFO L225 Difference]: With dead ends: 4097 [2022-11-16 20:30:42,593 INFO L226 Difference]: Without dead ends: 4094 [2022-11-16 20:30:42,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:42,599 INFO L413 NwaCegarLoop]: 3727 mSDtfsCounter, 3067 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3070 SdHoareTripleChecker+Valid, 6491 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3070 Valid, 6491 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 703 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2022-11-16 20:30:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2022-11-16 20:30:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 4090. [2022-11-16 20:30:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 2460 states have (on average 1.367479674796748) internal successors, (3364), 2564 states have internal predecessors, (3364), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2022-11-16 20:30:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 6183 transitions. [2022-11-16 20:30:43,014 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 6183 transitions. Word has length 18 [2022-11-16 20:30:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:43,015 INFO L495 AbstractCegarLoop]: Abstraction has 4090 states and 6183 transitions. [2022-11-16 20:30:43,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 6183 transitions. [2022-11-16 20:30:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 20:30:43,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:43,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:43,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:30:43,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1033832843, now seen corresponding path program 1 times [2022-11-16 20:30:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:30:43,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252807328] [2022-11-16 20:30:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:30:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:30:43,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:30:43,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252807328] [2022-11-16 20:30:43,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252807328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:43,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:43,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:30:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635887481] [2022-11-16 20:30:43,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:43,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:43,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:30:43,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:30:43,398 INFO L87 Difference]: Start difference. First operand 4090 states and 6183 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:45,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:47,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:30:49,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:51,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:54,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:55,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:58,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:00,132 INFO L93 Difference]: Finished difference Result 6259 states and 9422 transitions. [2022-11-16 20:31:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 20:31:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:00,186 INFO L225 Difference]: With dead ends: 6259 [2022-11-16 20:31:00,187 INFO L226 Difference]: Without dead ends: 6248 [2022-11-16 20:31:00,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:00,196 INFO L413 NwaCegarLoop]: 3652 mSDtfsCounter, 2987 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6398 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:00,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2995 Valid, 6398 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 682 Invalid, 5 Unknown, 0 Unchecked, 16.4s Time] [2022-11-16 20:31:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6248 states. [2022-11-16 20:31:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6248 to 6239. [2022-11-16 20:31:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 3754 states have (on average 1.3649440596696856) internal successors, (5124), 3913 states have internal predecessors, (5124), 2132 states have call successors, (2132), 355 states have call predecessors, (2132), 352 states have return successors, (2142), 2102 states have call predecessors, (2142), 2126 states have call successors, (2142) [2022-11-16 20:31:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 9398 transitions. [2022-11-16 20:31:00,682 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 9398 transitions. Word has length 19 [2022-11-16 20:31:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:00,682 INFO L495 AbstractCegarLoop]: Abstraction has 6239 states and 9398 transitions. [2022-11-16 20:31:00,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:31:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 9398 transitions. [2022-11-16 20:31:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 20:31:00,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:00,687 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] [2022-11-16 20:31:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:31:00,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -926419038, now seen corresponding path program 1 times [2022-11-16 20:31:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117722491] [2022-11-16 20:31:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:00,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:01,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117722491] [2022-11-16 20:31:01,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117722491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:01,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:01,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:31:01,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657530416] [2022-11-16 20:31:01,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:01,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:31:01,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:01,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:31:01,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:31:01,186 INFO L87 Difference]: Start difference. First operand 6239 states and 9398 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 20:31:03,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:05,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:31:07,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:10,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:16,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:21,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:24,007 INFO L93 Difference]: Finished difference Result 11670 states and 17835 transitions. [2022-11-16 20:31:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:31:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-16 20:31:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:24,091 INFO L225 Difference]: With dead ends: 11670 [2022-11-16 20:31:24,092 INFO L226 Difference]: Without dead ends: 11659 [2022-11-16 20:31:24,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:31:24,103 INFO L413 NwaCegarLoop]: 4690 mSDtfsCounter, 4044 mSDsluCounter, 6824 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 232 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 11514 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:24,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4047 Valid, 11514 Invalid, 1658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [232 Valid, 1422 Invalid, 4 Unknown, 0 Unchecked, 22.3s Time] [2022-11-16 20:31:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2022-11-16 20:31:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 10227. [2022-11-16 20:31:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 6160 states have (on average 1.36737012987013) internal successors, (8423), 6424 states have internal predecessors, (8423), 3501 states have call successors, (3501), 570 states have call predecessors, (3501), 565 states have return successors, (3527), 3449 states have call predecessors, (3527), 3495 states have call successors, (3527) [2022-11-16 20:31:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 15451 transitions. [2022-11-16 20:31:24,813 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 15451 transitions. Word has length 26 [2022-11-16 20:31:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:24,814 INFO L495 AbstractCegarLoop]: Abstraction has 10227 states and 15451 transitions. [2022-11-16 20:31:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 20:31:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 15451 transitions. [2022-11-16 20:31:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 20:31:24,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:24,822 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] [2022-11-16 20:31:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:31:24,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash -387853309, now seen corresponding path program 1 times [2022-11-16 20:31:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:24,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948700769] [2022-11-16 20:31:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:25,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:25,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948700769] [2022-11-16 20:31:25,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948700769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:25,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:25,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:31:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209030126] [2022-11-16 20:31:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:25,200 INFO L87 Difference]: Start difference. First operand 10227 states and 15451 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:31:27,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:29,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:31:30,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:36,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:41,069 INFO L93 Difference]: Finished difference Result 14360 states and 21690 transitions. [2022-11-16 20:31:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-11-16 20:31:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:41,160 INFO L225 Difference]: With dead ends: 14360 [2022-11-16 20:31:41,160 INFO L226 Difference]: Without dead ends: 14357 [2022-11-16 20:31:41,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:41,172 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3069 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 6578 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:41,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 6578 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2022-11-16 20:31:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14357 states. [2022-11-16 20:31:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14357 to 14353. [2022-11-16 20:31:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 8648 states have (on average 1.3669056429232191) internal successors, (11821), 9019 states have internal predecessors, (11821), 4910 states have call successors, (4910), 801 states have call predecessors, (4910), 794 states have return successors, (4952), 4839 states have call predecessors, (4952), 4904 states have call successors, (4952) [2022-11-16 20:31:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 21683 transitions. [2022-11-16 20:31:42,086 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 21683 transitions. Word has length 38 [2022-11-16 20:31:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:42,087 INFO L495 AbstractCegarLoop]: Abstraction has 14353 states and 21683 transitions. [2022-11-16 20:31:42,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:31:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 21683 transitions. [2022-11-16 20:31:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 20:31:42,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:42,097 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] [2022-11-16 20:31:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:31:42,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 860244124, now seen corresponding path program 1 times [2022-11-16 20:31:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841685673] [2022-11-16 20:31:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:42,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:42,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841685673] [2022-11-16 20:31:42,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841685673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:42,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:42,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:31:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372582233] [2022-11-16 20:31:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:42,579 INFO L87 Difference]: Start difference. First operand 14353 states and 21683 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:31:44,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:46,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:31:48,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:53,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:54,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:31:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:58,215 INFO L93 Difference]: Finished difference Result 14362 states and 21692 transitions. [2022-11-16 20:31:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:31:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-16 20:31:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:58,307 INFO L225 Difference]: With dead ends: 14362 [2022-11-16 20:31:58,307 INFO L226 Difference]: Without dead ends: 14359 [2022-11-16 20:31:58,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:58,323 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3060 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3068 SdHoareTripleChecker+Valid, 6581 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:58,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3068 Valid, 6581 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 4 Unknown, 0 Unchecked, 15.2s Time] [2022-11-16 20:31:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14359 states. [2022-11-16 20:31:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14359 to 14355. [2022-11-16 20:31:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14355 states, 8650 states have (on average 1.366820809248555) internal successors, (11823), 9021 states have internal predecessors, (11823), 4910 states have call successors, (4910), 801 states have call predecessors, (4910), 794 states have return successors, (4952), 4839 states have call predecessors, (4952), 4904 states have call successors, (4952) [2022-11-16 20:31:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14355 states to 14355 states and 21685 transitions. [2022-11-16 20:31:59,408 INFO L78 Accepts]: Start accepts. Automaton has 14355 states and 21685 transitions. Word has length 39 [2022-11-16 20:31:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:59,409 INFO L495 AbstractCegarLoop]: Abstraction has 14355 states and 21685 transitions. [2022-11-16 20:31:59,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:31:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 14355 states and 21685 transitions. [2022-11-16 20:31:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 20:31:59,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:59,416 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] [2022-11-16 20:31:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:31:59,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash 896563750, now seen corresponding path program 1 times [2022-11-16 20:31:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288251729] [2022-11-16 20:31:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:59,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288251729] [2022-11-16 20:31:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288251729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:59,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:59,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:31:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184727661] [2022-11-16 20:31:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:31:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:31:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:31:59,765 INFO L87 Difference]: Start difference. First operand 14355 states and 21685 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:32:01,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:03,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:07,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:09,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:12,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:15,073 INFO L93 Difference]: Finished difference Result 14364 states and 21693 transitions. [2022-11-16 20:32:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:32:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-16 20:32:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:15,155 INFO L225 Difference]: With dead ends: 14364 [2022-11-16 20:32:15,155 INFO L226 Difference]: Without dead ends: 14355 [2022-11-16 20:32:15,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:15,168 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3063 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 6584 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:15,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3066 Valid, 6584 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 3 Unknown, 0 Unchecked, 14.8s Time] [2022-11-16 20:32:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2022-11-16 20:32:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 14351. [2022-11-16 20:32:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14351 states, 8647 states have (on average 1.3667167803862612) internal successors, (11818), 9018 states have internal predecessors, (11818), 4909 states have call successors, (4909), 801 states have call predecessors, (4909), 794 states have return successors, (4951), 4838 states have call predecessors, (4951), 4903 states have call successors, (4951) [2022-11-16 20:32:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14351 states to 14351 states and 21678 transitions. [2022-11-16 20:32:16,203 INFO L78 Accepts]: Start accepts. Automaton has 14351 states and 21678 transitions. Word has length 40 [2022-11-16 20:32:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:16,203 INFO L495 AbstractCegarLoop]: Abstraction has 14351 states and 21678 transitions. [2022-11-16 20:32:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:32:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 14351 states and 21678 transitions. [2022-11-16 20:32:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 20:32:16,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:16,211 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] [2022-11-16 20:32:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:32:16,212 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:32:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2022477023, now seen corresponding path program 1 times [2022-11-16 20:32:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635992173] [2022-11-16 20:32:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:16,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635992173] [2022-11-16 20:32:16,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635992173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:16,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:16,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:32:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636430589] [2022-11-16 20:32:16,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:32:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:32:16,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:16,565 INFO L87 Difference]: Start difference. First operand 14351 states and 21678 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:32:18,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:20,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:22,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:26,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:30,909 INFO L93 Difference]: Finished difference Result 16657 states and 25091 transitions. [2022-11-16 20:32:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:32:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-16 20:32:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:30,983 INFO L225 Difference]: With dead ends: 16657 [2022-11-16 20:32:30,983 INFO L226 Difference]: Without dead ends: 16646 [2022-11-16 20:32:30,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:30,993 INFO L413 NwaCegarLoop]: 3853 mSDtfsCounter, 2987 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2994 SdHoareTripleChecker+Valid, 6599 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:30,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2994 Valid, 6599 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 722 Invalid, 4 Unknown, 0 Unchecked, 13.7s Time] [2022-11-16 20:32:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16646 states. [2022-11-16 20:32:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16646 to 16615. [2022-11-16 20:32:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16615 states, 10006 states have (on average 1.3647811313212073) internal successors, (13656), 10431 states have internal predecessors, (13656), 5662 states have call successors, (5662), 953 states have call predecessors, (5662), 946 states have return successors, (5715), 5587 states have call predecessors, (5715), 5656 states have call successors, (5715) [2022-11-16 20:32:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16615 states to 16615 states and 25033 transitions. [2022-11-16 20:32:32,013 INFO L78 Accepts]: Start accepts. Automaton has 16615 states and 25033 transitions. Word has length 41 [2022-11-16 20:32:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:32,014 INFO L495 AbstractCegarLoop]: Abstraction has 16615 states and 25033 transitions. [2022-11-16 20:32:32,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:32:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 16615 states and 25033 transitions. [2022-11-16 20:32:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 20:32:32,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:32,026 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] [2022-11-16 20:32:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:32:32,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:32:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1312055063, now seen corresponding path program 1 times [2022-11-16 20:32:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777840835] [2022-11-16 20:32:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:32,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777840835] [2022-11-16 20:32:32,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777840835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:32,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:32,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:32:32,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212185345] [2022-11-16 20:32:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:32,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:32:32,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:32:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:32,255 INFO L87 Difference]: Start difference. First operand 16615 states and 25033 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:32:34,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:36,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:38,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:43,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:46,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:32:48,392 INFO L93 Difference]: Finished difference Result 41781 states and 62570 transitions. [2022-11-16 20:32:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:32:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-11-16 20:32:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:32:48,548 INFO L225 Difference]: With dead ends: 41781 [2022-11-16 20:32:48,549 INFO L226 Difference]: Without dead ends: 25167 [2022-11-16 20:32:48,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:48,669 INFO L413 NwaCegarLoop]: 3584 mSDtfsCounter, 1563 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 6075 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:32:48,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 6075 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1009 Invalid, 3 Unknown, 0 Unchecked, 15.2s Time] [2022-11-16 20:32:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25167 states. [2022-11-16 20:32:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25167 to 24071. [2022-11-16 20:32:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24071 states, 14347 states have (on average 1.3518505610929115) internal successors, (19395), 14930 states have internal predecessors, (19395), 8239 states have call successors, (8239), 1491 states have call predecessors, (8239), 1484 states have return successors, (8301), 8132 states have call predecessors, (8301), 8233 states have call successors, (8301) [2022-11-16 20:32:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24071 states to 24071 states and 35935 transitions. [2022-11-16 20:32:50,519 INFO L78 Accepts]: Start accepts. Automaton has 24071 states and 35935 transitions. Word has length 50 [2022-11-16 20:32:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:32:50,520 INFO L495 AbstractCegarLoop]: Abstraction has 24071 states and 35935 transitions. [2022-11-16 20:32:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:32:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24071 states and 35935 transitions. [2022-11-16 20:32:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 20:32:50,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:32:50,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:32:50,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:32:50,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:32:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:32:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1697311353, now seen corresponding path program 1 times [2022-11-16 20:32:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:32:50,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309050903] [2022-11-16 20:32:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:32:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:32:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:32:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:32:50,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:32:50,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309050903] [2022-11-16 20:32:50,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309050903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:32:50,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:32:50,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:32:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739329557] [2022-11-16 20:32:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:32:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:32:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:32:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:32:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:32:50,861 INFO L87 Difference]: Start difference. First operand 24071 states and 35935 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:32:53,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:32:55,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:32:57,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:00,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:02,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:04,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:08,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:10,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:13,403 INFO L93 Difference]: Finished difference Result 61911 states and 92586 transitions. [2022-11-16 20:33:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:33:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-16 20:33:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:13,591 INFO L225 Difference]: With dead ends: 61911 [2022-11-16 20:33:13,591 INFO L226 Difference]: Without dead ends: 37841 [2022-11-16 20:33:13,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:33:13,688 INFO L413 NwaCegarLoop]: 4239 mSDtfsCounter, 2523 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 127 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2526 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:13,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2526 Valid, 6696 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1203 Invalid, 3 Unknown, 0 Unchecked, 20.9s Time] [2022-11-16 20:33:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37841 states. [2022-11-16 20:33:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37841 to 37804. [2022-11-16 20:33:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37804 states, 22729 states have (on average 1.335914470500242) internal successors, (30364), 23677 states have internal predecessors, (30364), 12704 states have call successors, (12704), 2383 states have call predecessors, (12704), 2370 states have return successors, (12788), 12524 states have call predecessors, (12788), 12698 states have call successors, (12788) [2022-11-16 20:33:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37804 states to 37804 states and 55856 transitions. [2022-11-16 20:33:15,790 INFO L78 Accepts]: Start accepts. Automaton has 37804 states and 55856 transitions. Word has length 62 [2022-11-16 20:33:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:15,791 INFO L495 AbstractCegarLoop]: Abstraction has 37804 states and 55856 transitions. [2022-11-16 20:33:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:33:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 37804 states and 55856 transitions. [2022-11-16 20:33:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 20:33:15,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:15,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:33:15,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1318210226, now seen corresponding path program 1 times [2022-11-16 20:33:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:33:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367801818] [2022-11-16 20:33:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:33:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:33:16,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:33:16,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367801818] [2022-11-16 20:33:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367801818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:33:16,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:33:16,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:33:16,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44044155] [2022-11-16 20:33:16,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:33:16,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:33:16,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:33:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:33:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:33:16,436 INFO L87 Difference]: Start difference. First operand 37804 states and 55856 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 20:33:18,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:21,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:33:24,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:25,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:33,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:35,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:39,315 INFO L93 Difference]: Finished difference Result 75156 states and 110965 transitions. [2022-11-16 20:33:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:33:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2022-11-16 20:33:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:39,612 INFO L225 Difference]: With dead ends: 75156 [2022-11-16 20:33:39,612 INFO L226 Difference]: Without dead ends: 37353 [2022-11-16 20:33:39,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:33:39,757 INFO L413 NwaCegarLoop]: 3716 mSDtfsCounter, 2633 mSDsluCounter, 13919 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 27 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 17635 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:39,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2646 Valid, 17635 Invalid, 1986 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 1954 Invalid, 5 Unknown, 0 Unchecked, 20.9s Time] [2022-11-16 20:33:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37353 states. [2022-11-16 20:33:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37353 to 37350. [2022-11-16 20:33:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37350 states, 22471 states have (on average 1.3345645498642695) internal successors, (29989), 23401 states have internal predecessors, (29989), 12504 states have call successors, (12504), 2387 states have call predecessors, (12504), 2374 states have return successors, (12586), 12330 states have call predecessors, (12586), 12498 states have call successors, (12586) [2022-11-16 20:33:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37350 states to 37350 states and 55079 transitions. [2022-11-16 20:33:41,996 INFO L78 Accepts]: Start accepts. Automaton has 37350 states and 55079 transitions. Word has length 61 [2022-11-16 20:33:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:41,997 INFO L495 AbstractCegarLoop]: Abstraction has 37350 states and 55079 transitions. [2022-11-16 20:33:41,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 20:33:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37350 states and 55079 transitions. [2022-11-16 20:33:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 20:33:42,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:42,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:33:42,014 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash 729143004, now seen corresponding path program 1 times [2022-11-16 20:33:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:33:42,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297443921] [2022-11-16 20:33:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:33:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:33:42,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:33:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297443921] [2022-11-16 20:33:42,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297443921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:33:42,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:33:42,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:33:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498141949] [2022-11-16 20:33:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:33:42,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:33:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:33:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:33:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:33:42,354 INFO L87 Difference]: Start difference. First operand 37350 states and 55079 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:33:44,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:46,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:33:49,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:53,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:56,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:33:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:57,861 INFO L93 Difference]: Finished difference Result 37956 states and 55817 transitions. [2022-11-16 20:33:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:33:57,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2022-11-16 20:33:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:58,141 INFO L225 Difference]: With dead ends: 37956 [2022-11-16 20:33:58,141 INFO L226 Difference]: Without dead ends: 37953 [2022-11-16 20:33:58,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:33:58,154 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 279 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 5593 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:58,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 5593 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 688 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2022-11-16 20:33:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37953 states. [2022-11-16 20:34:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37953 to 37953. [2022-11-16 20:34:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37953 states, 22791 states have (on average 1.331797639419069) internal successors, (30353), 23732 states have internal predecessors, (30353), 12685 states have call successors, (12685), 2489 states have call predecessors, (12685), 2476 states have return successors, (12769), 12512 states have call predecessors, (12769), 12680 states have call successors, (12769) [2022-11-16 20:34:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37953 states to 37953 states and 55807 transitions. [2022-11-16 20:34:00,213 INFO L78 Accepts]: Start accepts. Automaton has 37953 states and 55807 transitions. Word has length 71 [2022-11-16 20:34:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:34:00,213 INFO L495 AbstractCegarLoop]: Abstraction has 37953 states and 55807 transitions. [2022-11-16 20:34:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:34:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 37953 states and 55807 transitions. [2022-11-16 20:34:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 20:34:00,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:34:00,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:34:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:34:00,253 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:34:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:34:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash -204284459, now seen corresponding path program 1 times [2022-11-16 20:34:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:34:00,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413537582] [2022-11-16 20:34:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:34:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:34:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:34:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 20:34:01,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:34:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413537582] [2022-11-16 20:34:01,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413537582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:34:01,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:34:01,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:34:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966520889] [2022-11-16 20:34:01,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:34:01,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:34:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:34:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:34:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:34:01,110 INFO L87 Difference]: Start difference. First operand 37953 states and 55807 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:34:03,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:05,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:34:08,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:10,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:16,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:34:19,327 INFO L93 Difference]: Finished difference Result 104644 states and 153419 transitions. [2022-11-16 20:34:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:34:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2022-11-16 20:34:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:34:19,744 INFO L225 Difference]: With dead ends: 104644 [2022-11-16 20:34:19,744 INFO L226 Difference]: Without dead ends: 66692 [2022-11-16 20:34:19,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:34:19,850 INFO L413 NwaCegarLoop]: 4736 mSDtfsCounter, 2518 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2526 SdHoareTripleChecker+Valid, 7499 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:34:19,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2526 Valid, 7499 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 825 Invalid, 4 Unknown, 0 Unchecked, 15.1s Time] [2022-11-16 20:34:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66692 states. [2022-11-16 20:34:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66692 to 66030. [2022-11-16 20:34:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66030 states, 39508 states have (on average 1.3272501771793055) internal successors, (52437), 41286 states have internal predecessors, (52437), 22026 states have call successors, (22026), 4528 states have call predecessors, (22026), 4495 states have return successors, (22198), 21676 states have call predecessors, (22198), 22021 states have call successors, (22198) [2022-11-16 20:34:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66030 states to 66030 states and 96661 transitions. [2022-11-16 20:34:23,719 INFO L78 Accepts]: Start accepts. Automaton has 66030 states and 96661 transitions. Word has length 96 [2022-11-16 20:34:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:34:23,720 INFO L495 AbstractCegarLoop]: Abstraction has 66030 states and 96661 transitions. [2022-11-16 20:34:23,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:34:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 66030 states and 96661 transitions. [2022-11-16 20:34:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 20:34:23,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:34:23,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:34:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 20:34:23,810 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:34:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:34:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -513545268, now seen corresponding path program 1 times [2022-11-16 20:34:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:34:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63335003] [2022-11-16 20:34:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:34:23,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:34:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:34:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:34:25,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:34:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63335003] [2022-11-16 20:34:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63335003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:34:25,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:34:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:34:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033144513] [2022-11-16 20:34:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:34:25,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:34:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:34:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:34:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:34:25,318 INFO L87 Difference]: Start difference. First operand 66030 states and 96661 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:34:27,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:29,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:34:32,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:39,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:34:42,002 INFO L93 Difference]: Finished difference Result 133117 states and 194977 transitions. [2022-11-16 20:34:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:34:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 107 [2022-11-16 20:34:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:34:42,535 INFO L225 Difference]: With dead ends: 133117 [2022-11-16 20:34:42,535 INFO L226 Difference]: Without dead ends: 67088 [2022-11-16 20:34:42,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:34:42,759 INFO L413 NwaCegarLoop]: 2776 mSDtfsCounter, 35 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:34:42,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5531 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 673 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2022-11-16 20:34:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67088 states. [2022-11-16 20:34:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67088 to 66076. [2022-11-16 20:34:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66076 states, 39554 states have (on average 1.326869595995348) internal successors, (52483), 41332 states have internal predecessors, (52483), 22026 states have call successors, (22026), 4528 states have call predecessors, (22026), 4495 states have return successors, (22198), 21676 states have call predecessors, (22198), 22021 states have call successors, (22198) [2022-11-16 20:34:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66076 states to 66076 states and 96707 transitions. [2022-11-16 20:34:46,503 INFO L78 Accepts]: Start accepts. Automaton has 66076 states and 96707 transitions. Word has length 107 [2022-11-16 20:34:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:34:46,503 INFO L495 AbstractCegarLoop]: Abstraction has 66076 states and 96707 transitions. [2022-11-16 20:34:46,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:34:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 66076 states and 96707 transitions. [2022-11-16 20:34:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 20:34:46,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:34:46,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:34:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 20:34:46,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:34:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:34:46,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1264299176, now seen corresponding path program 1 times [2022-11-16 20:34:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:34:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748063039] [2022-11-16 20:34:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:34:46,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:34:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:34:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 20:34:48,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:34:48,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748063039] [2022-11-16 20:34:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748063039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:34:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863607845] [2022-11-16 20:34:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:34:48,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:34:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:34:48,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:34:48,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:34:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:34:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 7160 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:34:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:34:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 20:34:52,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:34:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863607845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:34:52,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:34:52,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:34:52,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447353625] [2022-11-16 20:34:52,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:34:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:34:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:34:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:34:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:34:52,883 INFO L87 Difference]: Start difference. First operand 66076 states and 96707 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-16 20:34:55,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:34:57,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:34:59,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:35:06,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:35:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:35:10,700 INFO L93 Difference]: Finished difference Result 98464 states and 144250 transitions. [2022-11-16 20:35:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:35:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 144 [2022-11-16 20:35:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:35:11,250 INFO L225 Difference]: With dead ends: 98464 [2022-11-16 20:35:11,250 INFO L226 Difference]: Without dead ends: 98461 [2022-11-16 20:35:11,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:35:11,289 INFO L413 NwaCegarLoop]: 3945 mSDtfsCounter, 2968 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 6701 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:35:11,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2976 Valid, 6701 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2022-11-16 20:35:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98461 states. [2022-11-16 20:35:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98461 to 97358. [2022-11-16 20:35:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97358 states, 58317 states have (on average 1.3280518545192654) internal successors, (77448), 60963 states have internal predecessors, (77448), 32472 states have call successors, (32472), 6625 states have call predecessors, (32472), 6568 states have return successors, (32728), 31926 states have call predecessors, (32728), 32467 states have call successors, (32728) [2022-11-16 20:35:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97358 states to 97358 states and 142648 transitions. [2022-11-16 20:35:16,682 INFO L78 Accepts]: Start accepts. Automaton has 97358 states and 142648 transitions. Word has length 144 [2022-11-16 20:35:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:35:16,682 INFO L495 AbstractCegarLoop]: Abstraction has 97358 states and 142648 transitions. [2022-11-16 20:35:16,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-16 20:35:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 97358 states and 142648 transitions. [2022-11-16 20:35:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 20:35:16,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:35:16,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:35:16,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:35:17,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 20:35:17,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:35:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:35:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -539773977, now seen corresponding path program 1 times [2022-11-16 20:35:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:35:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613045715] [2022-11-16 20:35:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:35:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:35:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:35:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 20:35:19,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:35:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613045715] [2022-11-16 20:35:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613045715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:35:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452473159] [2022-11-16 20:35:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:35:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:35:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:35:19,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:35:19,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_468b28c0-0722-48cf-b63b-91f94f4ba3e2/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process