./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW --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 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- 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-4e7fbc6 [2022-11-23 14:04:35,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:04:35,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:04:35,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:04:35,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:04:35,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:04:35,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:04:35,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:04:35,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:04:35,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:04:35,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:04:35,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:04:35,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:04:35,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:04:35,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:04:35,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:04:35,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:04:35,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:04:35,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:04:35,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:04:35,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:04:35,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:04:35,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:04:35,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:04:35,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:04:35,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:04:35,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:04:35,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:04:35,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:04:35,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:04:35,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:04:35,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:04:35,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:04:35,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:04:35,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:04:35,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:04:35,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:04:35,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:04:35,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:04:35,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:04:35,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:04:35,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:04:35,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:04:35,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:04:35,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:04:35,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:04:35,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:04:35,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:04:35,440 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:04:35,441 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:04:35,441 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:04:35,441 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:04:35,442 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:04:35,442 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:04:35,442 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:04:35,443 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:04:35,443 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:04:35,443 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:04:35,444 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:04:35,444 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:04:35,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:04:35,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:04:35,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:04:35,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:04:35,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:04:35,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:04:35,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:04:35,447 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:04:35,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:04:35,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:04:35,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:04:35,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:35,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:04:35,449 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:04:35,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:04:35,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:04:35,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:04:35,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:04:35,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:04:35,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:04:35,451 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_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2022-11-23 14:04:35,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:04:35,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:04:35,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:04:35,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:04:35,849 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:04:35,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-23 14:04:39,410 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:04:40,097 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:04:40,098 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-23 14:04:40,163 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/data/882cd059d/1a9fc8b843324a239ace6f88891b221e/FLAG621dbb2ba [2022-11-23 14:04:40,186 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/data/882cd059d/1a9fc8b843324a239ace6f88891b221e [2022-11-23 14:04:40,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:04:40,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:04:40,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:40,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:04:40,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:04:40,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:40" (1/1) ... [2022-11-23 14:04:40,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c0b95e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:40, skipping insertion in model container [2022-11-23 14:04:40,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:40" (1/1) ... [2022-11-23 14:04:40,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:04:40,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:04:42,376 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2022-11-23 14:04:42,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:42,539 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:04:42,888 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2022-11-23 14:04:42,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:42,960 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:04:42,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42 WrapperNode [2022-11-23 14:04:42,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:42,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:42,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:04:42,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:04:42,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,254 INFO L138 Inliner]: procedures = 216, calls = 1432, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3087 [2022-11-23 14:04:43,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:43,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:04:43,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:04:43,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:04:43,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:04:43,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:04:43,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:04:43,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:04:43,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (1/1) ... [2022-11-23 14:04:43,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:43,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:04:43,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:04:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-23 14:04:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-23 14:04:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2022-11-23 14:04:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2022-11-23 14:04:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-23 14:04:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-23 14:04:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:04:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:04:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-11-23 14:04:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-11-23 14:04:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2022-11-23 14:04:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2022-11-23 14:04:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:04:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:04:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-23 14:04:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-23 14:04:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2022-11-23 14:04:43,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2022-11-23 14:04:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 14:04:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 14:04:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:04:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:04:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-23 14:04:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-23 14:04:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2022-11-23 14:04:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2022-11-23 14:04:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 14:04:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 14:04:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:04:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-23 14:04:43,747 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-23 14:04:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 14:04:43,747 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 14:04:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:04:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 14:04:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 14:04:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-23 14:04:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-23 14:04:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:04:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:04:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-23 14:04:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-23 14:04:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-23 14:04:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-23 14:04:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 14:04:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 14:04:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 14:04:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 14:04:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-23 14:04:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-23 14:04:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 14:04:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 14:04:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-23 14:04:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-23 14:04:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2022-11-23 14:04:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2022-11-23 14:04:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2022-11-23 14:04:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2022-11-23 14:04:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-23 14:04:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-23 14:04:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2022-11-23 14:04:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2022-11-23 14:04:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-23 14:04:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-23 14:04:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2022-11-23 14:04:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2022-11-23 14:04:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:04:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 14:04:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 14:04:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 14:04:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 14:04:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:04:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-23 14:04:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-23 14:04:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-23 14:04:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-23 14:04:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:04:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:04:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:04:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 14:04:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 14:04:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 14:04:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 14:04:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:04:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:04:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-23 14:04:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-23 14:04:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2022-11-23 14:04:43,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2022-11-23 14:04:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:04:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2022-11-23 14:04:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2022-11-23 14:04:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-23 14:04:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-23 14:04:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:04:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:04:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2022-11-23 14:04:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2022-11-23 14:04:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2022-11-23 14:04:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2022-11-23 14:04:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:04:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:04:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:04:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-23 14:04:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-23 14:04:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:04:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:04:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 14:04:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 14:04:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2022-11-23 14:04:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2022-11-23 14:04:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 14:04:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 14:04:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:04:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:04:43,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:04:44,669 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:04:44,677 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:04:51,212 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:04:52,359 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:04:52,367 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:04:52,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:52 BoogieIcfgContainer [2022-11-23 14:04:52,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:04:52,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:04:52,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:04:52,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:04:52,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:04:40" (1/3) ... [2022-11-23 14:04:52,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1e243c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:52, skipping insertion in model container [2022-11-23 14:04:52,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:42" (2/3) ... [2022-11-23 14:04:52,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1e243c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:52, skipping insertion in model container [2022-11-23 14:04:52,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:52" (3/3) ... [2022-11-23 14:04:52,388 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-23 14:04:52,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:04:52,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:04:52,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:04:52,496 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;@1253f392, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:04:52,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:04:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 671 states, 415 states have (on average 1.3373493975903614) internal successors, (555), 435 states have internal predecessors, (555), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) [2022-11-23 14:04:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:04:52,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:52,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:04:52,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1776830020, now seen corresponding path program 1 times [2022-11-23 14:04:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:52,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193081738] [2022-11-23 14:04:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:04:53,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:53,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193081738] [2022-11-23 14:04:53,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193081738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:53,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:53,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:04:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617159631] [2022-11-23 14:04:53,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:53,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:53,189 INFO L87 Difference]: Start difference. First operand has 671 states, 415 states have (on average 1.3373493975903614) internal successors, (555), 435 states have internal predecessors, (555), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-23 14:04:55,508 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 [] [2022-11-23 14:05:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:00,347 INFO L93 Difference]: Finished difference Result 1929 states and 2814 transitions. [2022-11-23 14:05:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2022-11-23 14:05:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:00,377 INFO L225 Difference]: With dead ends: 1929 [2022-11-23 14:05:00,378 INFO L226 Difference]: Without dead ends: 1255 [2022-11-23 14:05:00,391 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 [2022-11-23 14:05:00,395 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 852 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:00,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1773 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 310 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-23 14:05:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-11-23 14:05:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1251. [2022-11-23 14:05:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 778 states have (on average 1.3277634961439588) internal successors, (1033), 807 states have internal predecessors, (1033), 376 states have call successors, (376), 98 states have call predecessors, (376), 96 states have return successors, (375), 355 states have call predecessors, (375), 368 states have call successors, (375) [2022-11-23 14:05:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1784 transitions. [2022-11-23 14:05:00,616 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1784 transitions. Word has length 7 [2022-11-23 14:05:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1784 transitions. [2022-11-23 14:05:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-23 14:05:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1784 transitions. [2022-11-23 14:05:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:05:00,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:00,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:05:00,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 752437624, now seen corresponding path program 1 times [2022-11-23 14:05:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:00,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193342295] [2022-11-23 14:05:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:00,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193342295] [2022-11-23 14:05:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193342295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:00,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:00,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:05:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083007592] [2022-11-23 14:05:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:00,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:00,767 INFO L87 Difference]: Start difference. First operand 1251 states and 1784 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-23 14:05:02,958 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 [] [2022-11-23 14:05:05,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:07,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:08,705 INFO L93 Difference]: Finished difference Result 2461 states and 3504 transitions. [2022-11-23 14:05:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2022-11-23 14:05:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:08,727 INFO L225 Difference]: With dead ends: 2461 [2022-11-23 14:05:08,727 INFO L226 Difference]: Without dead ends: 2458 [2022-11-23 14:05:08,729 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 [2022-11-23 14:05:08,730 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 886 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:08,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1782 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-23 14:05:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-23 14:05:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2451. [2022-11-23 14:05:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 1528 states have (on average 1.3285340314136125) internal successors, (2030), 1580 states have internal predecessors, (2030), 730 states have call successors, (730), 195 states have call predecessors, (730), 192 states have return successors, (735), 695 states have call predecessors, (735), 722 states have call successors, (735) [2022-11-23 14:05:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 3495 transitions. [2022-11-23 14:05:08,921 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 3495 transitions. Word has length 8 [2022-11-23 14:05:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:08,922 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 3495 transitions. [2022-11-23 14:05:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-23 14:05:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 3495 transitions. [2022-11-23 14:05:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:05:08,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:08,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:08,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:05:08,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1850328127, now seen corresponding path program 1 times [2022-11-23 14:05:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:08,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521091910] [2022-11-23 14:05:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:09,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521091910] [2022-11-23 14:05:09,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521091910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:09,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:05:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395146224] [2022-11-23 14:05:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:09,070 INFO L87 Difference]: Start difference. First operand 2451 states and 3495 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-23 14:05:11,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:13,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:16,546 INFO L93 Difference]: Finished difference Result 2462 states and 3505 transitions. [2022-11-23 14:05:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-11-23 14:05:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:16,571 INFO L225 Difference]: With dead ends: 2462 [2022-11-23 14:05:16,571 INFO L226 Difference]: Without dead ends: 2459 [2022-11-23 14:05:16,574 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 [2022-11-23 14:05:16,577 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 883 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:16,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1785 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:05:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-11-23 14:05:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2452. [2022-11-23 14:05:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 1529 states have (on average 1.328319162851537) internal successors, (2031), 1581 states have internal predecessors, (2031), 730 states have call successors, (730), 195 states have call predecessors, (730), 192 states have return successors, (735), 695 states have call predecessors, (735), 722 states have call successors, (735) [2022-11-23 14:05:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3496 transitions. [2022-11-23 14:05:16,790 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3496 transitions. Word has length 9 [2022-11-23 14:05:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:16,791 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 3496 transitions. [2022-11-23 14:05:16,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-23 14:05:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3496 transitions. [2022-11-23 14:05:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:05:16,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:16,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:16,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:05:16,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1525200219, now seen corresponding path program 1 times [2022-11-23 14:05:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521803806] [2022-11-23 14:05:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:17,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521803806] [2022-11-23 14:05:17,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521803806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:17,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:17,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:05:17,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982614367] [2022-11-23 14:05:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:17,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:17,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:17,015 INFO L87 Difference]: Start difference. First operand 2452 states and 3496 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-23 14:05:19,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:21,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:24,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:25,389 INFO L93 Difference]: Finished difference Result 4708 states and 6791 transitions. [2022-11-23 14:05:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2022-11-23 14:05:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:25,427 INFO L225 Difference]: With dead ends: 4708 [2022-11-23 14:05:25,427 INFO L226 Difference]: Without dead ends: 4699 [2022-11-23 14:05:25,430 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 [2022-11-23 14:05:25,434 INFO L413 NwaCegarLoop]: 1026 mSDtfsCounter, 874 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:25,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 1813 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2022-11-23 14:05:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2022-11-23 14:05:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4692. [2022-11-23 14:05:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 2925 states have (on average 1.3258119658119658) internal successors, (3878), 3021 states have internal predecessors, (3878), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2022-11-23 14:05:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 6769 transitions. [2022-11-23 14:05:25,762 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 6769 transitions. Word has length 10 [2022-11-23 14:05:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:25,763 INFO L495 AbstractCegarLoop]: Abstraction has 4692 states and 6769 transitions. [2022-11-23 14:05:25,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-23 14:05:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 6769 transitions. [2022-11-23 14:05:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:05:25,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:25,781 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-23 14:05:25,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:05:25,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:25,782 INFO L85 PathProgramCache]: Analyzing trace with hash -327150663, now seen corresponding path program 1 times [2022-11-23 14:05:25,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:25,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694288395] [2022-11-23 14:05:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:05:26,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694288395] [2022-11-23 14:05:26,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694288395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:26,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:26,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:26,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384761275] [2022-11-23 14:05:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:26,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:26,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:26,318 INFO L87 Difference]: Start difference. First operand 4692 states and 6769 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:05:28,593 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 [] [2022-11-23 14:05:31,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:31,763 INFO L93 Difference]: Finished difference Result 9431 states and 13624 transitions. [2022-11-23 14:05:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 84 [2022-11-23 14:05:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:31,805 INFO L225 Difference]: With dead ends: 9431 [2022-11-23 14:05:31,805 INFO L226 Difference]: Without dead ends: 4740 [2022-11-23 14:05:31,831 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 [2022-11-23 14:05:31,835 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 232 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:31,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1322 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 14:05:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2022-11-23 14:05:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 4740. [2022-11-23 14:05:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 2973 states have (on average 1.3282879246552304) internal successors, (3949), 3069 states have internal predecessors, (3949), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2022-11-23 14:05:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6840 transitions. [2022-11-23 14:05:32,330 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6840 transitions. Word has length 84 [2022-11-23 14:05:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:32,332 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 6840 transitions. [2022-11-23 14:05:32,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:05:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6840 transitions. [2022-11-23 14:05:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 14:05:32,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:32,342 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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] [2022-11-23 14:05:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:05:32,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:32,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1774183085, now seen corresponding path program 1 times [2022-11-23 14:05:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213302409] [2022-11-23 14:05:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:05:32,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:32,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213302409] [2022-11-23 14:05:32,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213302409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:32,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:32,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810831826] [2022-11-23 14:05:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:32,822 INFO L87 Difference]: Start difference. First operand 4740 states and 6840 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:05:35,014 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 [] [2022-11-23 14:05:39,500 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 [] [2022-11-23 14:05:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:39,895 INFO L93 Difference]: Finished difference Result 11628 states and 16737 transitions. [2022-11-23 14:05:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-23 14:05:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:39,951 INFO L225 Difference]: With dead ends: 11628 [2022-11-23 14:05:39,951 INFO L226 Difference]: Without dead ends: 6889 [2022-11-23 14:05:39,979 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 [2022-11-23 14:05:39,980 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 823 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:39,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1780 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 14:05:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6889 states. [2022-11-23 14:05:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6889 to 6866. [2022-11-23 14:05:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6866 states, 4294 states have (on average 1.320912901723335) internal successors, (5672), 4436 states have internal predecessors, (5672), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:05:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6866 states to 6866 states and 9847 transitions. [2022-11-23 14:05:40,621 INFO L78 Accepts]: Start accepts. Automaton has 6866 states and 9847 transitions. Word has length 96 [2022-11-23 14:05:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:40,622 INFO L495 AbstractCegarLoop]: Abstraction has 6866 states and 9847 transitions. [2022-11-23 14:05:40,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:05:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6866 states and 9847 transitions. [2022-11-23 14:05:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 14:05:40,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:40,628 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-23 14:05:40,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:05:40,629 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash -916185617, now seen corresponding path program 1 times [2022-11-23 14:05:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:40,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135573720] [2022-11-23 14:05:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:40,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:05:41,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135573720] [2022-11-23 14:05:41,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135573720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:41,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:41,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:05:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809733785] [2022-11-23 14:05:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:41,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:05:41,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:05:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:05:41,485 INFO L87 Difference]: Start difference. First operand 6866 states and 9847 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:05:43,864 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 [] [2022-11-23 14:05:49,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:51,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:53,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:54,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:57,241 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 [] [2022-11-23 14:05:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:58,088 INFO L93 Difference]: Finished difference Result 17599 states and 26405 transitions. [2022-11-23 14:05:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:05:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 98 [2022-11-23 14:05:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:58,160 INFO L225 Difference]: With dead ends: 17599 [2022-11-23 14:05:58,160 INFO L226 Difference]: Without dead ends: 10734 [2022-11-23 14:05:58,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:05:58,196 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 719 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 216 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:58,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 3919 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 721 Invalid, 2 Unknown, 0 Unchecked, 15.7s Time] [2022-11-23 14:05:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10734 states. [2022-11-23 14:05:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10734 to 6902. [2022-11-23 14:05:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6902 states, 4330 states have (on average 1.3182448036951502) internal successors, (5708), 4472 states have internal predecessors, (5708), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:05:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6902 states to 6902 states and 9883 transitions. [2022-11-23 14:05:58,990 INFO L78 Accepts]: Start accepts. Automaton has 6902 states and 9883 transitions. Word has length 98 [2022-11-23 14:05:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:58,992 INFO L495 AbstractCegarLoop]: Abstraction has 6902 states and 9883 transitions. [2022-11-23 14:05:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:05:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6902 states and 9883 transitions. [2022-11-23 14:05:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 14:05:59,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:59,101 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-23 14:05:59,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:05:59,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash -314299324, now seen corresponding path program 1 times [2022-11-23 14:05:59,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:59,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500220605] [2022-11-23 14:05:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:05:59,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500220605] [2022-11-23 14:05:59,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500220605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:59,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:59,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264816918] [2022-11-23 14:05:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:59,587 INFO L87 Difference]: Start difference. First operand 6902 states and 9883 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:06:01,840 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 [] [2022-11-23 14:06:07,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:06:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:07,558 INFO L93 Difference]: Finished difference Result 15300 states and 22301 transitions. [2022-11-23 14:06:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:07,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2022-11-23 14:06:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:07,657 INFO L225 Difference]: With dead ends: 15300 [2022-11-23 14:06:07,657 INFO L226 Difference]: Without dead ends: 8399 [2022-11-23 14:06:07,691 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 [2022-11-23 14:06:07,693 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 119 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:07,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1817 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:06:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8399 states. [2022-11-23 14:06:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8399 to 6914. [2022-11-23 14:06:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 4342 states have (on average 1.3173652694610778) internal successors, (5720), 4484 states have internal predecessors, (5720), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:06:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 9895 transitions. [2022-11-23 14:06:08,371 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 9895 transitions. Word has length 105 [2022-11-23 14:06:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:08,375 INFO L495 AbstractCegarLoop]: Abstraction has 6914 states and 9895 transitions. [2022-11-23 14:06:08,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:06:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 9895 transitions. [2022-11-23 14:06:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 14:06:08,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:08,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-11-23 14:06:08,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:06:08,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1464438342, now seen corresponding path program 1 times [2022-11-23 14:06:08,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:08,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531596735] [2022-11-23 14:06:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:06:08,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531596735] [2022-11-23 14:06:08,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531596735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:08,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:08,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:08,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264467192] [2022-11-23 14:06:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:08,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:08,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:08,837 INFO L87 Difference]: Start difference. First operand 6914 states and 9895 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:06:14,261 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 [] [2022-11-23 14:06:17,339 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 [] [2022-11-23 14:06:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:17,535 INFO L93 Difference]: Finished difference Result 13901 states and 19886 transitions. [2022-11-23 14:06:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:06:17,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 103 [2022-11-23 14:06:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:17,570 INFO L225 Difference]: With dead ends: 13901 [2022-11-23 14:06:17,570 INFO L226 Difference]: Without dead ends: 6986 [2022-11-23 14:06:17,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:17,590 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 21 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:17,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2420 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-11-23 14:06:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2022-11-23 14:06:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 6928. [2022-11-23 14:06:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6928 states, 4356 states have (on average 1.3161157024793388) internal successors, (5733), 4498 states have internal predecessors, (5733), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:06:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6928 states to 6928 states and 9908 transitions. [2022-11-23 14:06:18,303 INFO L78 Accepts]: Start accepts. Automaton has 6928 states and 9908 transitions. Word has length 103 [2022-11-23 14:06:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:18,303 INFO L495 AbstractCegarLoop]: Abstraction has 6928 states and 9908 transitions. [2022-11-23 14:06:18,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:06:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6928 states and 9908 transitions. [2022-11-23 14:06:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:06:18,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:18,306 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1] [2022-11-23 14:06:18,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:06:18,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1466335027, now seen corresponding path program 1 times [2022-11-23 14:06:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176692239] [2022-11-23 14:06:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:06:18,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176692239] [2022-11-23 14:06:18,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176692239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269543934] [2022-11-23 14:06:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:18,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:18,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:18,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:06:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:06:20,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269543934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:20,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:20,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:06:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147602938] [2022-11-23 14:06:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:20,103 INFO L87 Difference]: Start difference. First operand 6928 states and 9908 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:06:24,011 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 [] [2022-11-23 14:06:26,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:06:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:27,278 INFO L93 Difference]: Finished difference Result 13879 states and 19895 transitions. [2022-11-23 14:06:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:27,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 115 [2022-11-23 14:06:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:27,306 INFO L225 Difference]: With dead ends: 13879 [2022-11-23 14:06:27,306 INFO L226 Difference]: Without dead ends: 6952 [2022-11-23 14:06:27,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:27,324 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 2 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:27,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1600 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 14:06:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6952 states. [2022-11-23 14:06:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6952 to 6940. [2022-11-23 14:06:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 4368 states have (on average 1.3152472527472527) internal successors, (5745), 4510 states have internal predecessors, (5745), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:06:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 9920 transitions. [2022-11-23 14:06:27,815 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 9920 transitions. Word has length 115 [2022-11-23 14:06:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:27,816 INFO L495 AbstractCegarLoop]: Abstraction has 6940 states and 9920 transitions. [2022-11-23 14:06:27,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:06:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 9920 transitions. [2022-11-23 14:06:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 14:06:27,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:27,822 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1] [2022-11-23 14:06:27,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:28,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:06:28,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1529102833, now seen corresponding path program 1 times [2022-11-23 14:06:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:28,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699174346] [2022-11-23 14:06:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:06:28,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:28,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699174346] [2022-11-23 14:06:28,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699174346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:28,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473450158] [2022-11-23 14:06:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:28,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:28,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:06:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:06:29,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:29,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473450158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:29,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:29,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:06:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659407214] [2022-11-23 14:06:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:29,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:29,461 INFO L87 Difference]: Start difference. First operand 6940 states and 9920 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:06:33,340 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 [] [2022-11-23 14:06:34,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:06:36,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:06:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:36,839 INFO L93 Difference]: Finished difference Result 13891 states and 19895 transitions. [2022-11-23 14:06:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 117 [2022-11-23 14:06:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:36,875 INFO L225 Difference]: With dead ends: 13891 [2022-11-23 14:06:36,875 INFO L226 Difference]: Without dead ends: 6952 [2022-11-23 14:06:36,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:36,901 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 0 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:36,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1601 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 14:06:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6952 states. [2022-11-23 14:06:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6952 to 6952. [2022-11-23 14:06:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6952 states, 4380 states have (on average 1.3143835616438355) internal successors, (5757), 4522 states have internal predecessors, (5757), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-23 14:06:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6952 states to 6952 states and 9932 transitions. [2022-11-23 14:06:37,438 INFO L78 Accepts]: Start accepts. Automaton has 6952 states and 9932 transitions. Word has length 117 [2022-11-23 14:06:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:37,439 INFO L495 AbstractCegarLoop]: Abstraction has 6952 states and 9932 transitions. [2022-11-23 14:06:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:06:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6952 states and 9932 transitions. [2022-11-23 14:06:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 14:06:37,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:37,442 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1] [2022-11-23 14:06:37,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:06:37,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -997694532, now seen corresponding path program 1 times [2022-11-23 14:06:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:37,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660639503] [2022-11-23 14:06:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:06:38,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660639503] [2022-11-23 14:06:38,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660639503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:38,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323311880] [2022-11-23 14:06:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:38,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:38,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:38,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:06:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:39,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:06:39,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:06:39,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323311880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762048122] [2022-11-23 14:06:39,376 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-11-23 14:06:39,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:06:39,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:06:39,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:06:39,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:06:46,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:06:46,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:06:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,027 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-23 14:06:54,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:06:54,088 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:06:54,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:06:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,170 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 14:06:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 14:06:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,506 INFO L217 Elim1Store]: Index analysis took 199 ms [2022-11-23 14:06:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:55,805 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-23 14:06:55,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-23 14:06:56,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:06:58,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-23 14:06:58,925 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-23 14:06:58,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-23 14:06:58,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:06:59,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 187 [2022-11-23 14:06:59,727 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-23 14:06:59,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 219 [2022-11-23 14:06:59,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 180 [2022-11-23 14:07:00,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:07:00,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 14:07:00,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:07:00,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-23 14:07:00,888 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-23 14:07:00,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-23 14:07:00,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:07:01,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 199 [2022-11-23 14:07:01,544 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-23 14:07:01,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 242 treesize of output 228 [2022-11-23 14:07:01,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 192 [2022-11-23 14:07:03,211 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:07:03,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:07:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144421832] [2022-11-23 14:07:03,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:07:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:07:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:03,217 INFO L87 Difference]: Start difference. First operand 6952 states and 9932 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 14:07:05,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:09,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:14,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:16,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:19,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:19,052 INFO L93 Difference]: Finished difference Result 19875 states and 29939 transitions. [2022-11-23 14:07:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:07:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 118 [2022-11-23 14:07:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:19,114 INFO L225 Difference]: With dead ends: 19875 [2022-11-23 14:07:19,114 INFO L226 Difference]: Without dead ends: 12924 [2022-11-23 14:07:19,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:19,145 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 714 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 99 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:19,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 3113 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 919 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2022-11-23 14:07:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12924 states. [2022-11-23 14:07:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12924 to 7096. [2022-11-23 14:07:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 4488 states have (on average 1.3148395721925135) internal successors, (5901), 4630 states have internal predecessors, (5901), 2040 states have call successors, (2040), 574 states have call predecessors, (2040), 567 states have return successors, (2207), 1951 states have call predecessors, (2207), 2032 states have call successors, (2207) [2022-11-23 14:07:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 10148 transitions. [2022-11-23 14:07:19,955 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 10148 transitions. Word has length 118 [2022-11-23 14:07:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:19,956 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 10148 transitions. [2022-11-23 14:07:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 14:07:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 10148 transitions. [2022-11-23 14:07:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-23 14:07:19,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:19,960 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-23 14:07:19,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:07:20,170 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2126013519, now seen corresponding path program 2 times [2022-11-23 14:07:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783076527] [2022-11-23 14:07:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-23 14:07:20,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783076527] [2022-11-23 14:07:20,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783076527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655641118] [2022-11-23 14:07:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:20,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:20,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:07:21,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:07:21,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:07:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:07:21,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:21,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655641118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:21,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:07:21,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:07:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059995821] [2022-11-23 14:07:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:07:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:07:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:07:21,774 INFO L87 Difference]: Start difference. First operand 7096 states and 10148 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:07:24,049 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 [] [2022-11-23 14:07:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:28,177 INFO L93 Difference]: Finished difference Result 7146 states and 10242 transitions. [2022-11-23 14:07:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 148 [2022-11-23 14:07:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:28,209 INFO L225 Difference]: With dead ends: 7146 [2022-11-23 14:07:28,209 INFO L226 Difference]: Without dead ends: 7143 [2022-11-23 14:07:28,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:28,215 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 51 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:28,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2323 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 493 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-23 14:07:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2022-11-23 14:07:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7143. [2022-11-23 14:07:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 4518 states have (on average 1.3140770252324037) internal successors, (5937), 4665 states have internal predecessors, (5937), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-23 14:07:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 10234 transitions. [2022-11-23 14:07:28,732 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 10234 transitions. Word has length 148 [2022-11-23 14:07:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:28,733 INFO L495 AbstractCegarLoop]: Abstraction has 7143 states and 10234 transitions. [2022-11-23 14:07:28,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:07:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 10234 transitions. [2022-11-23 14:07:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 14:07:28,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:28,737 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:28,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:07:28,946 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1078375941, now seen corresponding path program 1 times [2022-11-23 14:07:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250537966] [2022-11-23 14:07:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-23 14:07:29,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:29,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250537966] [2022-11-23 14:07:29,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250537966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:29,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:29,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:29,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246939868] [2022-11-23 14:07:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:29,263 INFO L87 Difference]: Start difference. First operand 7143 states and 10234 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 14:07:31,497 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 [] [2022-11-23 14:07:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:34,297 INFO L93 Difference]: Finished difference Result 14321 states and 20551 transitions. [2022-11-23 14:07:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2022-11-23 14:07:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:34,329 INFO L225 Difference]: With dead ends: 14321 [2022-11-23 14:07:34,329 INFO L226 Difference]: Without dead ends: 7179 [2022-11-23 14:07:34,352 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 [2022-11-23 14:07:34,353 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 1 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:34,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1596 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 14:07:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-11-23 14:07:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 7155. [2022-11-23 14:07:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 4530 states have (on average 1.3132450331125827) internal successors, (5949), 4677 states have internal predecessors, (5949), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-23 14:07:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 10246 transitions. [2022-11-23 14:07:34,862 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 10246 transitions. Word has length 155 [2022-11-23 14:07:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:34,863 INFO L495 AbstractCegarLoop]: Abstraction has 7155 states and 10246 transitions. [2022-11-23 14:07:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 14:07:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 10246 transitions. [2022-11-23 14:07:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-23 14:07:34,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:34,867 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:34,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:07:34,867 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash -618959488, now seen corresponding path program 1 times [2022-11-23 14:07:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:34,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507095425] [2022-11-23 14:07:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-23 14:07:35,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507095425] [2022-11-23 14:07:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507095425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028954431] [2022-11-23 14:07:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:35,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:35,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:07:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 2401 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:07:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:07:36,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:36,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028954431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:36,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:07:36,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:07:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847309658] [2022-11-23 14:07:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:36,278 INFO L87 Difference]: Start difference. First operand 7155 states and 10246 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:07:39,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:41,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:07:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:42,199 INFO L93 Difference]: Finished difference Result 14345 states and 20599 transitions. [2022-11-23 14:07:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 160 [2022-11-23 14:07:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:42,222 INFO L225 Difference]: With dead ends: 14345 [2022-11-23 14:07:42,222 INFO L226 Difference]: Without dead ends: 7191 [2022-11-23 14:07:42,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:42,241 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 1 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:42,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1596 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:07:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2022-11-23 14:07:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7167. [2022-11-23 14:07:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 4542 states have (on average 1.3124174372523119) internal successors, (5961), 4689 states have internal predecessors, (5961), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-23 14:07:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 10258 transitions. [2022-11-23 14:07:42,747 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 10258 transitions. Word has length 160 [2022-11-23 14:07:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:42,750 INFO L495 AbstractCegarLoop]: Abstraction has 7167 states and 10258 transitions. [2022-11-23 14:07:42,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:07:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 10258 transitions. [2022-11-23 14:07:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-23 14:07:42,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:42,754 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:42,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:07:42,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1290033677, now seen corresponding path program 1 times [2022-11-23 14:07:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:42,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445800539] [2022-11-23 14:07:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-23 14:07:43,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445800539] [2022-11-23 14:07:43,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445800539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630059724] [2022-11-23 14:07:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:43,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:43,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:43,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:07:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:07:44,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:07:44,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-23 14:07:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630059724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628801289] [2022-11-23 14:07:44,635 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-23 14:07:44,636 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:44,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:44,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:44,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:49,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:07:49,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:08:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:05,828 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-23 14:08:05,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2797 treesize of output 2789 [2022-11-23 14:08:06,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,323 INFO L217 Elim1Store]: Index analysis took 208 ms [2022-11-23 14:08:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:07,736 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-23 14:08:07,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 888 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 2839 treesize of output 2603 [2022-11-23 14:08:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:08,143 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 14:08:08,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2797 treesize of output 2799 [2022-11-23 14:08:08,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:08,476 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-23 14:08:08,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2781 treesize of output 2785 [2022-11-23 14:08:08,800 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-23 14:08:08,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 2759 treesize of output 2759 [2022-11-23 14:08:30,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-23 14:08:30,967 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-23 14:08:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-23 14:08:30,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:08:31,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-23 14:08:31,383 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-23 14:08:31,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 423 [2022-11-23 14:08:31,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 424 treesize of output 384 [2022-11-23 14:08:33,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:08:33,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 14:08:33,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:08:33,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-23 14:08:33,588 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-23 14:08:33,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-23 14:08:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:08:33,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 403 [2022-11-23 14:08:33,978 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-23 14:08:33,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 432 [2022-11-23 14:08:34,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-23 14:08:36,631 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:08:36,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:08:36,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:08:36,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561595487] [2022-11-23 14:08:36,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:36,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:08:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:08:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:08:36,640 INFO L87 Difference]: Start difference. First operand 7167 states and 10258 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2022-11-23 14:08:40,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:08:43,552 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 [] [2022-11-23 14:08:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:43,740 INFO L93 Difference]: Finished difference Result 14441 states and 20719 transitions. [2022-11-23 14:08:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:08:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) Word has length 165 [2022-11-23 14:08:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:43,766 INFO L225 Difference]: With dead ends: 14441 [2022-11-23 14:08:43,766 INFO L226 Difference]: Without dead ends: 7275 [2022-11-23 14:08:43,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:08:43,788 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 6 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:43,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1597 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 307 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 14:08:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2022-11-23 14:08:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 7275. [2022-11-23 14:08:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 4614 states have (on average 1.3075422626788036) internal successors, (6033), 4761 states have internal predecessors, (6033), 2075 states have call successors, (2075), 586 states have call predecessors, (2075), 585 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-23 14:08:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 10402 transitions. [2022-11-23 14:08:44,234 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 10402 transitions. Word has length 165 [2022-11-23 14:08:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:44,234 INFO L495 AbstractCegarLoop]: Abstraction has 7275 states and 10402 transitions. [2022-11-23 14:08:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2022-11-23 14:08:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 10402 transitions. [2022-11-23 14:08:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-23 14:08:44,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:44,240 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:44,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:08:44,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1312379186, now seen corresponding path program 2 times [2022-11-23 14:08:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699686884] [2022-11-23 14:08:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 14:08:44,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:44,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699686884] [2022-11-23 14:08:44,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699686884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:44,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828947951] [2022-11-23 14:08:44,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:08:44,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:44,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:44,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:08:45,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:08:45,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:08:45,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-23 14:08:45,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:45,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828947951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:45,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:08:45,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2022-11-23 14:08:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006443787] [2022-11-23 14:08:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:08:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:08:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:08:45,920 INFO L87 Difference]: Start difference. First operand 7275 states and 10402 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-23 14:08:52,000 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 [] [2022-11-23 14:08:54,816 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 [] [2022-11-23 14:08:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:57,910 INFO L93 Difference]: Finished difference Result 7302 states and 10428 transitions. [2022-11-23 14:08:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:08:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 180 [2022-11-23 14:08:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:57,933 INFO L225 Difference]: With dead ends: 7302 [2022-11-23 14:08:57,933 INFO L226 Difference]: Without dead ends: 7299 [2022-11-23 14:08:57,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:08:57,938 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 16 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3920 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:57,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3920 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 796 Invalid, 1 Unknown, 0 Unchecked, 11.6s Time] [2022-11-23 14:08:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7299 states. [2022-11-23 14:08:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7299 to 7299. [2022-11-23 14:08:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7299 states, 4632 states have (on average 1.3063471502590673) internal successors, (6051), 4773 states have internal predecessors, (6051), 2075 states have call successors, (2075), 598 states have call predecessors, (2075), 591 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-23 14:08:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 10420 transitions. [2022-11-23 14:08:58,520 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 10420 transitions. Word has length 180 [2022-11-23 14:08:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:58,521 INFO L495 AbstractCegarLoop]: Abstraction has 7299 states and 10420 transitions. [2022-11-23 14:08:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-23 14:08:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 10420 transitions. [2022-11-23 14:08:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:08:58,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:58,528 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:58,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:08:58,739 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:08:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 13447929, now seen corresponding path program 1 times [2022-11-23 14:08:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386546136] [2022-11-23 14:08:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 14:08:59,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386546136] [2022-11-23 14:08:59,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386546136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:59,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054214752] [2022-11-23 14:08:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:59,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:59,209 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:09:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:09:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:09:00,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:09:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054214752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:09:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:09:00,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432720769] [2022-11-23 14:09:00,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:09:00,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:09:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:00,454 INFO L87 Difference]: Start difference. First operand 7299 states and 10420 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:09:04,099 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 [] [2022-11-23 14:09:06,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:09:07,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:09:10,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:09:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:10,360 INFO L93 Difference]: Finished difference Result 18384 states and 26986 transitions. [2022-11-23 14:09:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:09:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 188 [2022-11-23 14:09:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:10,412 INFO L225 Difference]: With dead ends: 18384 [2022-11-23 14:09:10,412 INFO L226 Difference]: Without dead ends: 11086 [2022-11-23 14:09:10,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:10,442 INFO L413 NwaCegarLoop]: 1238 mSDtfsCounter, 291 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 2132 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-11-23 14:09:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2022-11-23 14:09:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 7299. [2022-11-23 14:09:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7299 states, 4632 states have (on average 1.3037564766839378) internal successors, (6039), 4761 states have internal predecessors, (6039), 2075 states have call successors, (2075), 598 states have call predecessors, (2075), 591 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-23 14:09:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 10408 transitions. [2022-11-23 14:09:10,961 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 10408 transitions. Word has length 188 [2022-11-23 14:09:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:10,962 INFO L495 AbstractCegarLoop]: Abstraction has 7299 states and 10408 transitions. [2022-11-23 14:09:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:09:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 10408 transitions. [2022-11-23 14:09:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-23 14:09:10,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:10,970 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:10,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:11,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:09:11,184 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1509040496, now seen corresponding path program 1 times [2022-11-23 14:09:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578892266] [2022-11-23 14:09:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 14:09:11,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578892266] [2022-11-23 14:09:11,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578892266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856256504] [2022-11-23 14:09:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:11,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:11,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:09:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:09:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-23 14:09:13,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 14:09:13,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856256504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:13,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130167039] [2022-11-23 14:09:13,537 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-23 14:09:13,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:13,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:13,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:13,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:18,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:09:18,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:09:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,584 INFO L217 Elim1Store]: Index analysis took 235 ms [2022-11-23 14:09:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:24,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:25,998 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-23 14:09:26,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-23 14:09:26,579 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:09:26,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:09:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:26,685 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-23 14:09:26,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:09:26,788 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:09:26,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:09:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:26,923 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 14:09:26,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 14:09:28,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-23 14:09:28,860 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-23 14:09:28,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-23 14:09:28,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:09:29,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-23 14:09:29,275 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-23 14:09:29,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 399 [2022-11-23 14:09:29,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 355 [2022-11-23 14:09:31,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 14:09:31,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:09:31,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:09:31,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-23 14:09:31,493 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-23 14:09:31,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-23 14:09:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:09:31,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 403 [2022-11-23 14:09:31,889 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-23 14:09:31,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 432 [2022-11-23 14:09:31,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-23 14:09:34,871 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:09:34,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:34,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:09:34,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447465220] [2022-11-23 14:09:34,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:34,881 INFO L87 Difference]: Start difference. First operand 7299 states and 10408 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-23 14:09:39,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:09:41,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:09:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:42,152 INFO L93 Difference]: Finished difference Result 14705 states and 21043 transitions. [2022-11-23 14:09:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) Word has length 193 [2022-11-23 14:09:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:42,175 INFO L225 Difference]: With dead ends: 14705 [2022-11-23 14:09:42,175 INFO L226 Difference]: Without dead ends: 7407 [2022-11-23 14:09:42,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:42,196 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 4 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2393 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:42,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2393 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 14:09:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2022-11-23 14:09:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 7407. [2022-11-23 14:09:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7407 states, 4704 states have (on average 1.2991071428571428) internal successors, (6111), 4833 states have internal predecessors, (6111), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-23 14:09:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7407 states to 7407 states and 10552 transitions. [2022-11-23 14:09:42,631 INFO L78 Accepts]: Start accepts. Automaton has 7407 states and 10552 transitions. Word has length 193 [2022-11-23 14:09:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:42,631 INFO L495 AbstractCegarLoop]: Abstraction has 7407 states and 10552 transitions. [2022-11-23 14:09:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-23 14:09:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7407 states and 10552 transitions. [2022-11-23 14:09:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 14:09:42,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:42,637 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:42,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:42,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:42,851 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1014674472, now seen corresponding path program 1 times [2022-11-23 14:09:42,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799489476] [2022-11-23 14:09:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:09:43,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799489476] [2022-11-23 14:09:43,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799489476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103392131] [2022-11-23 14:09:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:43,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:43,560 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:43,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:09:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:44,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:09:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 14:09:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:09:44,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103392131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032666584] [2022-11-23 14:09:44,969 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-23 14:09:44,969 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:44,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:44,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:44,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:50,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:09:50,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:09:56,168 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:09:56,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:09:56,222 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:09:56,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:09:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,286 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-23 14:09:56,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:09:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,361 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 14:09:56,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 14:09:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,653 INFO L217 Elim1Store]: Index analysis took 187 ms [2022-11-23 14:09:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:58,009 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-23 14:09:58,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-23 14:10:00,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-23 14:10:00,381 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-23 14:10:00,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-23 14:10:00,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:10:00,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-23 14:10:00,848 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-23 14:10:00,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 399 [2022-11-23 14:10:00,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 355 [2022-11-23 14:10:02,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:10:02,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:10:02,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 14:10:02,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-23 14:10:02,947 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-23 14:10:02,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-23 14:10:02,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:10:03,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 403 [2022-11-23 14:10:03,382 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-23 14:10:03,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 408 [2022-11-23 14:10:03,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 367 [2022-11-23 14:10:06,487 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:10:06,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:06,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:10:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160043344] [2022-11-23 14:10:06,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:06,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:10:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:10:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:06,490 INFO L87 Difference]: Start difference. First operand 7407 states and 10552 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:10:10,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:10:11,752 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 [] [2022-11-23 14:10:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:12,716 INFO L93 Difference]: Finished difference Result 14849 states and 21207 transitions. [2022-11-23 14:10:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:10:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 190 [2022-11-23 14:10:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:12,739 INFO L225 Difference]: With dead ends: 14849 [2022-11-23 14:10:12,739 INFO L226 Difference]: Without dead ends: 7443 [2022-11-23 14:10:12,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:12,758 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 0 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:12,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:10:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7443 states. [2022-11-23 14:10:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7443 to 7443. [2022-11-23 14:10:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 4740 states have (on average 1.2968354430379747) internal successors, (6147), 4869 states have internal predecessors, (6147), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-23 14:10:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 10588 transitions. [2022-11-23 14:10:13,397 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 10588 transitions. Word has length 190 [2022-11-23 14:10:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:13,397 INFO L495 AbstractCegarLoop]: Abstraction has 7443 states and 10588 transitions. [2022-11-23 14:10:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:10:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 10588 transitions. [2022-11-23 14:10:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-23 14:10:13,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:13,403 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:13,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:13,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:13,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash 494763015, now seen corresponding path program 2 times [2022-11-23 14:10:13,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:13,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487374223] [2022-11-23 14:10:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-23 14:10:14,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487374223] [2022-11-23 14:10:14,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487374223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205923896] [2022-11-23 14:10:14,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:10:14,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:14,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:14,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:10:15,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:10:15,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:15,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:10:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-23 14:10:15,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205923896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:15,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:15,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:10:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840518535] [2022-11-23 14:10:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:10:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:10:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:10:15,440 INFO L87 Difference]: Start difference. First operand 7443 states and 10588 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-23 14:10:19,953 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 [] [2022-11-23 14:10:22,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:10:25,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:10:26,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:10:28,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:10:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:29,196 INFO L93 Difference]: Finished difference Result 9882 states and 14477 transitions. [2022-11-23 14:10:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 193 [2022-11-23 14:10:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:29,228 INFO L225 Difference]: With dead ends: 9882 [2022-11-23 14:10:29,228 INFO L226 Difference]: Without dead ends: 9855 [2022-11-23 14:10:29,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:29,234 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 383 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:29,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 3077 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 473 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2022-11-23 14:10:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2022-11-23 14:10:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 7443. [2022-11-23 14:10:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 4740 states have (on average 1.2945147679324895) internal successors, (6136), 4869 states have internal predecessors, (6136), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-23 14:10:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 10577 transitions. [2022-11-23 14:10:29,686 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 10577 transitions. Word has length 193 [2022-11-23 14:10:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:29,686 INFO L495 AbstractCegarLoop]: Abstraction has 7443 states and 10577 transitions. [2022-11-23 14:10:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-23 14:10:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 10577 transitions. [2022-11-23 14:10:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-23 14:10:29,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:29,693 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:29,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:29,905 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1559180608, now seen corresponding path program 1 times [2022-11-23 14:10:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:29,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884067826] [2022-11-23 14:10:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-23 14:10:30,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884067826] [2022-11-23 14:10:30,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884067826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370041172] [2022-11-23 14:10:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:30,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:30,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:30,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:10:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:10:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:10:31,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-23 14:10:32,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370041172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581747095] [2022-11-23 14:10:32,146 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-23 14:10:32,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:10:32,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:10:32,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:10:32,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:10:37,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:10:37,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:10:43,500 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:10:43,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:10:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,775 INFO L217 Elim1Store]: Index analysis took 179 ms [2022-11-23 14:10:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:45,295 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-23 14:10:45,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-23 14:10:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:45,964 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 14:10:45,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 14:10:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:46,077 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-23 14:10:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:10:46,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:10:47,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-23 14:10:48,031 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-23 14:10:48,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-23 14:10:48,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:10:48,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-23 14:10:48,575 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-23 14:10:48,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 399 [2022-11-23 14:10:48,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 355 [2022-11-23 14:10:50,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 14:10:50,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:10:50,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 14:10:50,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-23 14:10:50,802 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-23 14:10:50,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-23 14:10:50,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-23 14:10:51,223 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-23 14:10:51,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 432 [2022-11-23 14:10:51,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-23 14:10:51,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-23 14:10:54,534 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:10:54,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:54,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:10:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764648904] [2022-11-23 14:10:54,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:54,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:10:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:10:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:54,539 INFO L87 Difference]: Start difference. First operand 7443 states and 10577 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:10:59,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:02,060 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 [] [2022-11-23 14:11:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:02,365 INFO L93 Difference]: Finished difference Result 15101 states and 21473 transitions. [2022-11-23 14:11:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:11:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 195 [2022-11-23 14:11:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:02,393 INFO L225 Difference]: With dead ends: 15101 [2022-11-23 14:11:02,394 INFO L226 Difference]: Without dead ends: 7659 [2022-11-23 14:11:02,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:11:02,415 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 8 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:02,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2394 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:11:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2022-11-23 14:11:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 7659. [2022-11-23 14:11:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7659 states, 4956 states have (on average 1.2889426957223566) internal successors, (6388), 5085 states have internal predecessors, (6388), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-23 14:11:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7659 states to 7659 states and 10829 transitions. [2022-11-23 14:11:02,893 INFO L78 Accepts]: Start accepts. Automaton has 7659 states and 10829 transitions. Word has length 195 [2022-11-23 14:11:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:02,893 INFO L495 AbstractCegarLoop]: Abstraction has 7659 states and 10829 transitions. [2022-11-23 14:11:02,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:11:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7659 states and 10829 transitions. [2022-11-23 14:11:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 14:11:02,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:02,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:02,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 14:11:03,101 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1344022169, now seen corresponding path program 2 times [2022-11-23 14:11:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:03,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257934032] [2022-11-23 14:11:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-23 14:11:03,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257934032] [2022-11-23 14:11:03,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257934032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:03,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:03,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:11:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243877438] [2022-11-23 14:11:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:03,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:11:03,986 INFO L87 Difference]: Start difference. First operand 7659 states and 10829 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:11:07,895 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 [] [2022-11-23 14:11:09,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:11,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:11,516 INFO L93 Difference]: Finished difference Result 10151 states and 14393 transitions. [2022-11-23 14:11:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 208 [2022-11-23 14:11:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:11,547 INFO L225 Difference]: With dead ends: 10151 [2022-11-23 14:11:11,547 INFO L226 Difference]: Without dead ends: 10146 [2022-11-23 14:11:11,553 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 [2022-11-23 14:11:11,553 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 836 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:11,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1894 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-11-23 14:11:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10146 states. [2022-11-23 14:11:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10146 to 10121. [2022-11-23 14:11:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10121 states, 6544 states have (on average 1.2894254278728607) internal successors, (8438), 6716 states have internal predecessors, (8438), 2797 states have call successors, (2797), 790 states have call predecessors, (2797), 779 states have return successors, (3123), 2678 states have call predecessors, (3123), 2790 states have call successors, (3123) [2022-11-23 14:11:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10121 states to 10121 states and 14358 transitions. [2022-11-23 14:11:12,177 INFO L78 Accepts]: Start accepts. Automaton has 10121 states and 14358 transitions. Word has length 208 [2022-11-23 14:11:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:12,178 INFO L495 AbstractCegarLoop]: Abstraction has 10121 states and 14358 transitions. [2022-11-23 14:11:12,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:11:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10121 states and 14358 transitions. [2022-11-23 14:11:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-23 14:11:12,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:12,185 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:11:12,185 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1609199771, now seen corresponding path program 1 times [2022-11-23 14:11:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:12,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584548550] [2022-11-23 14:11:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:12,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-23 14:11:15,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584548550] [2022-11-23 14:11:15,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584548550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:15,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:15,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:11:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743424512] [2022-11-23 14:11:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:11:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:11:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:11:15,724 INFO L87 Difference]: Start difference. First operand 10121 states and 14358 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 14:11:22,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:27,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:30,285 INFO L93 Difference]: Finished difference Result 16973 states and 23990 transitions. [2022-11-23 14:11:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:11:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 225 [2022-11-23 14:11:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:30,338 INFO L225 Difference]: With dead ends: 16973 [2022-11-23 14:11:30,338 INFO L226 Difference]: Without dead ends: 16965 [2022-11-23 14:11:30,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:11:30,347 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 2061 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 1927 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2209 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 4001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1927 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:30,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2209 Valid, 1890 Invalid, 4001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1927 Valid, 2072 Invalid, 2 Unknown, 0 Unchecked, 13.1s Time] [2022-11-23 14:11:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16965 states. [2022-11-23 14:11:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16965 to 16858. [2022-11-23 14:11:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16858 states, 10812 states have (on average 1.2862560118386976) internal successors, (13907), 11141 states have internal predecessors, (13907), 4681 states have call successors, (4681), 1398 states have call predecessors, (4681), 1364 states have return successors, (5247), 4432 states have call predecessors, (5247), 4674 states have call successors, (5247) [2022-11-23 14:11:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 23835 transitions. [2022-11-23 14:11:31,647 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 23835 transitions. Word has length 225 [2022-11-23 14:11:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:31,647 INFO L495 AbstractCegarLoop]: Abstraction has 16858 states and 23835 transitions. [2022-11-23 14:11:31,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 14:11:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 23835 transitions. [2022-11-23 14:11:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-23 14:11:31,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:31,655 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:11:31,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1446072710, now seen corresponding path program 2 times [2022-11-23 14:11:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820948434] [2022-11-23 14:11:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-23 14:11:32,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820948434] [2022-11-23 14:11:32,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820948434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978026395] [2022-11-23 14:11:32,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:11:32,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:32,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:32,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:32,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:11:34,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:11:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-23 14:11:34,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:34,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978026395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:34,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:34,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-23 14:11:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579230872] [2022-11-23 14:11:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:34,363 INFO L87 Difference]: Start difference. First operand 16858 states and 23835 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:11:38,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:41,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:42,479 INFO L93 Difference]: Finished difference Result 33805 states and 47807 transitions. [2022-11-23 14:11:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 213 [2022-11-23 14:11:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:42,532 INFO L225 Difference]: With dead ends: 33805 [2022-11-23 14:11:42,532 INFO L226 Difference]: Without dead ends: 16948 [2022-11-23 14:11:42,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:42,573 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 317 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:42,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1464 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 363 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 14:11:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16948 states. [2022-11-23 14:11:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16948 to 16858. [2022-11-23 14:11:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16858 states, 10812 states have (on average 1.2808916019237884) internal successors, (13849), 11141 states have internal predecessors, (13849), 4681 states have call successors, (4681), 1398 states have call predecessors, (4681), 1364 states have return successors, (5247), 4432 states have call predecessors, (5247), 4674 states have call successors, (5247) [2022-11-23 14:11:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 23777 transitions. [2022-11-23 14:11:43,956 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 23777 transitions. Word has length 213 [2022-11-23 14:11:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:43,957 INFO L495 AbstractCegarLoop]: Abstraction has 16858 states and 23777 transitions. [2022-11-23 14:11:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:11:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 23777 transitions. [2022-11-23 14:11:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-23 14:11:43,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:43,965 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:43,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 14:11:44,177 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1597371723, now seen corresponding path program 1 times [2022-11-23 14:11:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685034426] [2022-11-23 14:11:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-23 14:11:53,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685034426] [2022-11-23 14:11:53,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685034426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:53,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:53,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:11:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567183606] [2022-11-23 14:11:53,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:53,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:11:53,968 INFO L87 Difference]: Start difference. First operand 16858 states and 23777 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:11:58,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:00,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:01,267 INFO L93 Difference]: Finished difference Result 33739 states and 47601 transitions. [2022-11-23 14:12:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 218 [2022-11-23 14:12:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:01,323 INFO L225 Difference]: With dead ends: 33739 [2022-11-23 14:12:01,324 INFO L226 Difference]: Without dead ends: 16882 [2022-11-23 14:12:01,368 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 [2022-11-23 14:12:01,369 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 0 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:01,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1595 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 14:12:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16882 states. [2022-11-23 14:12:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16882 to 16882. [2022-11-23 14:12:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16882 states, 10836 states have (on average 1.2802694721299372) internal successors, (13873), 11165 states have internal predecessors, (13873), 4681 states have call successors, (4681), 1398 states have call predecessors, (4681), 1364 states have return successors, (5247), 4432 states have call predecessors, (5247), 4674 states have call successors, (5247) [2022-11-23 14:12:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16882 states to 16882 states and 23801 transitions. [2022-11-23 14:12:02,675 INFO L78 Accepts]: Start accepts. Automaton has 16882 states and 23801 transitions. Word has length 218 [2022-11-23 14:12:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:02,675 INFO L495 AbstractCegarLoop]: Abstraction has 16882 states and 23801 transitions. [2022-11-23 14:12:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 14:12:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 16882 states and 23801 transitions. [2022-11-23 14:12:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-23 14:12:02,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:02,681 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:02,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 14:12:02,682 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash 353149430, now seen corresponding path program 1 times [2022-11-23 14:12:02,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:02,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983838404] [2022-11-23 14:12:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-23 14:12:10,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983838404] [2022-11-23 14:12:10,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983838404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074438601] [2022-11-23 14:12:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:10,035 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:10,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:12:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 3739 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:12:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-23 14:12:12,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:12,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074438601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:12,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:12,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2022-11-23 14:12:12,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756923321] [2022-11-23 14:12:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:12,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:12:12,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:12:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:12:12,247 INFO L87 Difference]: Start difference. First operand 16882 states and 23801 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:12:21,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:24,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:25,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:27,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:31,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:33,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:35,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:40,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:43,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:44,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:46,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:47,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:49,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:51,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:53,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:55,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:57,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:12:59,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:13:01,494 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 [] [2022-11-23 14:13:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:03,603 INFO L93 Difference]: Finished difference Result 52206 states and 79656 transitions. [2022-11-23 14:13:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 14:13:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 219 [2022-11-23 14:13:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:03,938 INFO L225 Difference]: With dead ends: 52206 [2022-11-23 14:13:03,938 INFO L226 Difference]: Without dead ends: 35325 [2022-11-23 14:13:03,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:13:03,981 INFO L413 NwaCegarLoop]: 1299 mSDtfsCounter, 1966 mSDsluCounter, 9481 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 937 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2056 SdHoareTripleChecker+Valid, 10780 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:03,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2056 Valid, 10780 Invalid, 2878 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [937 Valid, 1931 Invalid, 10 Unknown, 0 Unchecked, 46.2s Time] [2022-11-23 14:13:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35325 states. [2022-11-23 14:13:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35325 to 14593. [2022-11-23 14:13:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14593 states, 9406 states have (on average 1.2583457367637678) internal successors, (11836), 9683 states have internal predecessors, (11836), 3865 states have call successors, (3865), 1335 states have call predecessors, (3865), 1321 states have return successors, (4599), 3673 states have call predecessors, (4599), 3858 states have call successors, (4599) [2022-11-23 14:13:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14593 states to 14593 states and 20300 transitions. [2022-11-23 14:13:06,414 INFO L78 Accepts]: Start accepts. Automaton has 14593 states and 20300 transitions. Word has length 219 [2022-11-23 14:13:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:06,415 INFO L495 AbstractCegarLoop]: Abstraction has 14593 states and 20300 transitions. [2022-11-23 14:13:06,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:13:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 14593 states and 20300 transitions. [2022-11-23 14:13:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-23 14:13:06,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:06,418 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:06,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26283a64-cab9-430e-8712-47f277b33c52/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 14:13:06,619 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -835770728, now seen corresponding path program 1 times [2022-11-23 14:13:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597271856] [2022-11-23 14:13:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-23 14:13:11,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597271856] [2022-11-23 14:13:11,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597271856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:11,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:11,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270824906] [2022-11-23 14:13:11,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:11,078 INFO L87 Difference]: Start difference. First operand 14593 states and 20300 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 14:13:15,632 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 [] [2022-11-23 14:13:19,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:13:22,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:13:23,886 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 [] [2022-11-23 14:13:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:25,898 INFO L93 Difference]: Finished difference Result 17803 states and 24654 transitions. [2022-11-23 14:13:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:13:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 239 [2022-11-23 14:13:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:25,959 INFO L225 Difference]: With dead ends: 17803 [2022-11-23 14:13:25,959 INFO L226 Difference]: Without dead ends: 17792 [2022-11-23 14:13:25,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:13:25,967 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 1299 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 852 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:25,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 1136 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 1246 Invalid, 1 Unknown, 0 Unchecked, 12.9s Time] [2022-11-23 14:13:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17792 states. [2022-11-23 14:13:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17792 to 17723. [2022-11-23 14:13:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17723 states, 11393 states have (on average 1.254542262792943) internal successors, (14293), 11745 states have internal predecessors, (14293), 4687 states have call successors, (4687), 1660 states have call predecessors, (4687), 1642 states have return successors, (5575), 4440 states have call predecessors, (5575), 4680 states have call successors, (5575) [2022-11-23 14:13:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17723 states to 17723 states and 24555 transitions. [2022-11-23 14:13:27,819 INFO L78 Accepts]: Start accepts. Automaton has 17723 states and 24555 transitions. Word has length 239 [2022-11-23 14:13:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:27,820 INFO L495 AbstractCegarLoop]: Abstraction has 17723 states and 24555 transitions. [2022-11-23 14:13:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-23 14:13:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 17723 states and 24555 transitions. [2022-11-23 14:13:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-23 14:13:27,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:27,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-23 14:13:27,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1639047872, now seen corresponding path program 1 times [2022-11-23 14:13:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:27,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161623706] [2022-11-23 14:13:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:13:28,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:28,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161623706] [2022-11-23 14:13:28,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161623706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:28,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:28,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:13:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566859673] [2022-11-23 14:13:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:28,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:13:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:13:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:13:28,579 INFO L87 Difference]: Start difference. First operand 17723 states and 24555 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:13:31,676 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 [] [2022-11-23 14:13:34,601 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 [] [2022-11-23 14:13:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:37,000 INFO L93 Difference]: Finished difference Result 21122 states and 29282 transitions. [2022-11-23 14:13:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:13:37,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 241 [2022-11-23 14:13:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:37,060 INFO L225 Difference]: With dead ends: 21122 [2022-11-23 14:13:37,061 INFO L226 Difference]: Without dead ends: 21118 [2022-11-23 14:13:37,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:13:37,069 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 795 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:37,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1779 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 14:13:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21118 states. [2022-11-23 14:13:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21118 to 20989. [2022-11-23 14:13:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20989 states, 13447 states have (on average 1.2544805532832601) internal successors, (16869), 13890 states have internal predecessors, (16869), 5583 states have call successors, (5583), 1985 states have call predecessors, (5583), 1958 states have return successors, (6636), 5261 states have call predecessors, (6636), 5576 states have call successors, (6636) [2022-11-23 14:13:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20989 states to 20989 states and 29088 transitions. [2022-11-23 14:13:39,658 INFO L78 Accepts]: Start accepts. Automaton has 20989 states and 29088 transitions. Word has length 241 [2022-11-23 14:13:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:39,659 INFO L495 AbstractCegarLoop]: Abstraction has 20989 states and 29088 transitions. [2022-11-23 14:13:39,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:13:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 20989 states and 29088 transitions. [2022-11-23 14:13:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-23 14:13:39,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:39,663 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:39,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-23 14:13:39,663 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1729503496, now seen corresponding path program 1 times [2022-11-23 14:13:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:39,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923843296] [2022-11-23 14:13:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:40,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:40,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923843296] [2022-11-23 14:13:40,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923843296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:40,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:40,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:13:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510948954] [2022-11-23 14:13:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:13:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:13:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:13:40,059 INFO L87 Difference]: Start difference. First operand 20989 states and 29088 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:13:42,998 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 [] [2022-11-23 14:13:45,657 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 [] [2022-11-23 14:13:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:50,424 INFO L93 Difference]: Finished difference Result 34577 states and 47797 transitions. [2022-11-23 14:13:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:13:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 241 [2022-11-23 14:13:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:50,552 INFO L225 Difference]: With dead ends: 34577 [2022-11-23 14:13:50,552 INFO L226 Difference]: Without dead ends: 34574 [2022-11-23 14:13:50,567 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 [2022-11-23 14:13:50,568 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 837 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:50,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1785 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 14:13:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34574 states. [2022-11-23 14:13:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34574 to 34566. [2022-11-23 14:13:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34566 states, 22066 states have (on average 1.2529683676243994) internal successors, (27648), 22799 states have internal predecessors, (27648), 9211 states have call successors, (9211), 3335 states have call predecessors, (9211), 3288 states have return successors, (10910), 8679 states have call predecessors, (10910), 9204 states have call successors, (10910) [2022-11-23 14:13:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34566 states to 34566 states and 47769 transitions. [2022-11-23 14:13:54,160 INFO L78 Accepts]: Start accepts. Automaton has 34566 states and 47769 transitions. Word has length 241 [2022-11-23 14:13:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:54,161 INFO L495 AbstractCegarLoop]: Abstraction has 34566 states and 47769 transitions. [2022-11-23 14:13:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:13:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 34566 states and 47769 transitions. [2022-11-23 14:13:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-23 14:13:54,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:54,165 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-23 14:13:54,165 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2074599087, now seen corresponding path program 1 times [2022-11-23 14:13:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:54,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011785921] [2022-11-23 14:13:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:54,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011785921] [2022-11-23 14:13:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011785921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:54,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:54,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:13:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575168898] [2022-11-23 14:13:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:54,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:13:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:54,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:13:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:13:54,525 INFO L87 Difference]: Start difference. First operand 34566 states and 47769 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:13:57,909 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 [] [2022-11-23 14:14:00,526 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 [] [2022-11-23 14:14:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:14:05,229 INFO L93 Difference]: Finished difference Result 34577 states and 47779 transitions. [2022-11-23 14:14:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:14:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 242 [2022-11-23 14:14:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:14:05,335 INFO L225 Difference]: With dead ends: 34577 [2022-11-23 14:14:05,335 INFO L226 Difference]: Without dead ends: 34568 [2022-11-23 14:14:05,350 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 [2022-11-23 14:14:05,351 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 834 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:14:05,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1788 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-23 14:14:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34568 states. [2022-11-23 14:14:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34568 to 34558. [2022-11-23 14:14:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34558 states, 22058 states have (on average 1.2513827182881494) internal successors, (27603), 22791 states have internal predecessors, (27603), 9211 states have call successors, (9211), 3335 states have call predecessors, (9211), 3288 states have return successors, (10910), 8679 states have call predecessors, (10910), 9204 states have call successors, (10910) [2022-11-23 14:14:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34558 states to 34558 states and 47724 transitions. [2022-11-23 14:14:09,392 INFO L78 Accepts]: Start accepts. Automaton has 34558 states and 47724 transitions. Word has length 242 [2022-11-23 14:14:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:14:09,393 INFO L495 AbstractCegarLoop]: Abstraction has 34558 states and 47724 transitions. [2022-11-23 14:14:09,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 14:14:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34558 states and 47724 transitions. [2022-11-23 14:14:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-23 14:14:09,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:14:09,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:14:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-23 14:14:09,401 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:14:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:14:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1796882520, now seen corresponding path program 1 times [2022-11-23 14:14:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:14:09,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033579680] [2022-11-23 14:14:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:14:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-23 14:14:10,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:10,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033579680] [2022-11-23 14:14:10,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033579680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:14:10,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:14:10,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:14:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744498095] [2022-11-23 14:14:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:14:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:14:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:14:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:14:10,140 INFO L87 Difference]: Start difference. First operand 34558 states and 47724 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:14:15,456 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 [] [2022-11-23 14:14:17,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:21,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:25,646 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 [] [2022-11-23 14:14:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:14:31,345 INFO L93 Difference]: Finished difference Result 82104 states and 116506 transitions. [2022-11-23 14:14:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:14:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 259 [2022-11-23 14:14:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:14:31,557 INFO L225 Difference]: With dead ends: 82104 [2022-11-23 14:14:31,557 INFO L226 Difference]: Without dead ends: 47547 [2022-11-23 14:14:31,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:14:31,659 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 287 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 4606 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:14:31,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 4606 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 809 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2022-11-23 14:14:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47547 states. [2022-11-23 14:14:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47547 to 34566. [2022-11-23 14:14:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34566 states, 22120 states have (on average 1.2493218806509945) internal successors, (27635), 22783 states have internal predecessors, (27635), 9161 states have call successors, (9161), 3319 states have call predecessors, (9161), 3284 states have return successors, (10842), 8711 states have call predecessors, (10842), 9154 states have call successors, (10842) [2022-11-23 14:14:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34566 states to 34566 states and 47638 transitions. [2022-11-23 14:14:36,879 INFO L78 Accepts]: Start accepts. Automaton has 34566 states and 47638 transitions. Word has length 259 [2022-11-23 14:14:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:14:36,880 INFO L495 AbstractCegarLoop]: Abstraction has 34566 states and 47638 transitions. [2022-11-23 14:14:36,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 14:14:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34566 states and 47638 transitions. [2022-11-23 14:14:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-23 14:14:36,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:14:36,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:14:36,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-23 14:14:36,888 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:14:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:14:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1093194594, now seen corresponding path program 1 times [2022-11-23 14:14:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:14:36,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125561864] [2022-11-23 14:14:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:36,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:14:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:14:37,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125561864] [2022-11-23 14:14:37,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125561864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:14:37,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:14:37,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:14:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18548320] [2022-11-23 14:14:37,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:14:37,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:14:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:37,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:14:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:14:37,388 INFO L87 Difference]: Start difference. First operand 34566 states and 47638 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 14:14:42,944 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 [] [2022-11-23 14:14:45,970 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 [] [2022-11-23 14:14:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:14:54,048 INFO L93 Difference]: Finished difference Result 74865 states and 105822 transitions. [2022-11-23 14:14:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:14:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) Word has length 250 [2022-11-23 14:14:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:14:54,201 INFO L225 Difference]: With dead ends: 74865 [2022-11-23 14:14:54,201 INFO L226 Difference]: Without dead ends: 43592 [2022-11-23 14:14:54,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:14:54,452 INFO L413 NwaCegarLoop]: 1231 mSDtfsCounter, 290 mSDsluCounter, 3345 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 4576 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:14:54,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 4576 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 794 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 14:14:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43592 states.