./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7 --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 3f6913532a755844f996d9829f52a3e3b688eef2b6253ebf9e48902f9dc25d55 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:31:54,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:31:54,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:31:54,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:31:54,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:31:54,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:31:54,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:31:54,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:31:54,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:31:54,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:31:54,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:31:54,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:31:54,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:31:54,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:31:54,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:31:54,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:31:54,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:31:54,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:31:54,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:31:54,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:31:54,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:31:54,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:31:54,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:31:54,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:31:54,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:31:54,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:31:54,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:31:54,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:31:54,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:31:54,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:31:54,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:31:54,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:31:54,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:31:54,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:31:54,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:31:54,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:31:54,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:31:54,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:31:54,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:31:54,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:31:54,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:31:54,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:31:54,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:31:54,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:31:54,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:31:54,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:31:54,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:31:54,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:31:54,571 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:31:54,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:31:54,571 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:31:54,571 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:31:54,571 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:31:54,572 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:31:54,572 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:31:54,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:31:54,572 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:31:54,572 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:31:54,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:31:54,573 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:31:54,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:31:54,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:31:54,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:31:54,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:31:54,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:31:54,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:31:54,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:31:54,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:31:54,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:31:54,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:31:54,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:31:54,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:31:54,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:31:54,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:31:54,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:31:54,576 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:31:54,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:31:54,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:31:54,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:31:54,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:31:54,577 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6913532a755844f996d9829f52a3e3b688eef2b6253ebf9e48902f9dc25d55 [2021-11-25 19:31:54,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:31:54,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:31:54,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:31:54,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:31:54,928 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:31:54,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2021-11-25 19:31:55,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/data/988e38097/a8f9e29f0dec4bf2bff219ddef7e0bbd/FLAG0c638e5e0 [2021-11-25 19:31:56,222 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:31:56,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2021-11-25 19:31:56,287 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/data/988e38097/a8f9e29f0dec4bf2bff219ddef7e0bbd/FLAG0c638e5e0 [2021-11-25 19:31:56,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/data/988e38097/a8f9e29f0dec4bf2bff219ddef7e0bbd [2021-11-25 19:31:56,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:31:56,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:31:56,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:31:56,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:31:56,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:31:56,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:31:56" (1/1) ... [2021-11-25 19:31:56,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550cc59a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:31:56, skipping insertion in model container [2021-11-25 19:31:56,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:31:56" (1/1) ... [2021-11-25 19:31:56,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:31:56,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:32:02,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i[502624,502637] [2021-11-25 19:32:02,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:02,339 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:32:02,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i[502624,502637] [2021-11-25 19:32:02,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:03,387 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:32:03,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03 WrapperNode [2021-11-25 19:32:03,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:03,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:03,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:32:03,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:32:03,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:03,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:03,995 INFO L137 Inliner]: procedures = 567, calls = 7123, calls flagged for inlining = 254, calls inlined = 183, statements flattened = 10378 [2021-11-25 19:32:03,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:03,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:32:03,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:32:03,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:32:04,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:32:04,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:32:04,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:32:04,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:32:04,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (1/1) ... [2021-11-25 19:32:04,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:04,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:32:04,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:32:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-25 19:32:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-25 19:32:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2021-11-25 19:32:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2021-11-25 19:32:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-25 19:32:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-25 19:32:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-25 19:32:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_irq [2021-11-25 19:32:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_irq [2021-11-25 19:32:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-25 19:32:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-25 19:32:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2021-11-25 19:32:04,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2021-11-25 19:32:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_completion_interrupt [2021-11-25 19:32:04,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_completion_interrupt [2021-11-25 19:32:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:32:04,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:32:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_xgmac_reg [2021-11-25 19:32:04,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_xgmac_reg [2021-11-25 19:32:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_reset [2021-11-25 19:32:04,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_reset [2021-11-25 19:32:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2021-11-25 19:32:04,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2021-11-25 19:32:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 19:32:04,619 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 19:32:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_send [2021-11-25 19:32:04,619 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_send [2021-11-25 19:32:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2021-11-25 19:32:04,619 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2021-11-25 19:32:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-25 19:32:04,620 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-25 19:32:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-25 19:32:04,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-25 19:32:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-25 19:32:04,620 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-25 19:32:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 19:32:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 19:32:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-25 19:32:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-25 19:32:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 19:32:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 19:32:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_regs_len [2021-11-25 19:32:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_regs_len [2021-11-25 19:32:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 19:32:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 19:32:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure PageTail [2021-11-25 19:32:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure PageTail [2021-11-25 19:32:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure ql_release_all [2021-11-25 19:32:04,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_release_all [2021-11-25 19:32:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mailbox_command [2021-11-25 19:32:04,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mailbox_command [2021-11-25 19:32:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 19:32:04,623 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 19:32:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_irq_mask [2021-11-25 19:32:04,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_irq_mask [2021-11-25 19:32:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 19:32:04,624 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 19:32:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 19:32:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure __qlge_vlan_rx_add_vid [2021-11-25 19:32:04,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __qlge_vlan_rx_add_vid [2021-11-25 19:32:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-25 19:32:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-25 19:32:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-25 19:32:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-25 19:32:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:32:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 19:32:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 19:32:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ql_queue_asic_error [2021-11-25 19:32:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_queue_asic_error [2021-11-25 19:32:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ql_update_buffer_queues [2021-11-25 19:32:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_update_buffer_queues [2021-11-25 19:32:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_mem_resources [2021-11-25 19:32:04,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_mem_resources [2021-11-25 19:32:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_xgmac_reg [2021-11-25 19:32:04,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_xgmac_reg [2021-11-25 19:32:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-25 19:32:04,627 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-25 19:32:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2021-11-25 19:32:04,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2021-11-25 19:32:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure ql_eeh_close [2021-11-25 19:32:04,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_eeh_close [2021-11-25 19:32:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 19:32:04,628 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 19:32:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr_reg [2021-11-25 19:32:04,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr_reg [2021-11-25 19:32:04,629 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 19:32:04,629 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 19:32:04,629 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2021-11-25 19:32:04,629 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2021-11-25 19:32:04,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:32:04,630 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2021-11-25 19:32:04,630 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2021-11-25 19:32:04,630 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 19:32:04,630 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 19:32:04,630 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 19:32:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 19:32:04,631 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_close [2021-11-25 19:32:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_close [2021-11-25 19:32:04,631 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_mb_sts [2021-11-25 19:32:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_mb_sts [2021-11-25 19:32:04,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:32:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_open [2021-11-25 19:32:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_open [2021-11-25 19:32:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-25 19:32:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-25 19:32:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:32:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 19:32:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 19:32:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 19:32:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 19:32:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-25 19:32:04,633 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-25 19:32:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_offset [2021-11-25 19:32:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_offset [2021-11-25 19:32:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_rx_buffers [2021-11-25 19:32:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_rx_buffers [2021-11-25 19:32:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2021-11-25 19:32:04,634 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2021-11-25 19:32:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-25 19:32:04,635 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-25 19:32:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write32 [2021-11-25 19:32:04,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write32 [2021-11-25 19:32:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cam_route_initialize [2021-11-25 19:32:04,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cam_route_initialize [2021-11-25 19:32:04,636 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 19:32:04,636 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 19:32:04,636 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 19:32:04,636 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 19:32:04,636 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2021-11-25 19:32:04,636 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2021-11-25 19:32:04,637 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_trylock [2021-11-25 19:32:04,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_trylock [2021-11-25 19:32:04,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:32:04,637 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_mpi_reg [2021-11-25 19:32:04,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_mpi_reg [2021-11-25 19:32:04,637 INFO L130 BoogieDeclarations]: Found specification of procedure __get_order [2021-11-25 19:32:04,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __get_order [2021-11-25 19:32:04,638 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2021-11-25 19:32:04,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2021-11-25 19:32:04,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:32:04,638 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 19:32:04,638 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 19:32:04,639 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 19:32:04,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 19:32:04,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:32:04,639 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 19:32:04,639 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2021-11-25 19:32:04,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2021-11-25 19:32:04,639 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_8012_flash_params [2021-11-25 19:32:04,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_8012_flash_params [2021-11-25 19:32:04,640 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 19:32:04,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 19:32:04,640 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-25 19:32:04,640 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-25 19:32:04,640 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 19:32:04,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 19:32:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_completion_interrupt [2021-11-25 19:32:04,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_completion_interrupt [2021-11-25 19:32:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 19:32:04,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 19:32:04,641 INFO L130 BoogieDeclarations]: Found specification of procedure ql_clear_routing_entries [2021-11-25 19:32:04,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_clear_routing_entries [2021-11-25 19:32:04,642 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-25 19:32:04,642 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-25 19:32:04,642 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_off [2021-11-25 19:32:04,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_off [2021-11-25 19:32:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 19:32:04,643 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 19:32:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-25 19:32:04,643 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-25 19:32:04,643 INFO L130 BoogieDeclarations]: Found specification of procedure ql_8000_port_initialize [2021-11-25 19:32:04,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_8000_port_initialize [2021-11-25 19:32:04,644 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2021-11-25 19:32:04,644 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2021-11-25 19:32:04,644 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 19:32:04,644 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 19:32:04,644 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 19:32:04,644 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 19:32:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mpi_mutex_of_ql_adapter [2021-11-25 19:32:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mpi_mutex_of_ql_adapter [2021-11-25 19:32:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:32:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:32:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ql_8012_port_initialize [2021-11-25 19:32:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_8012_port_initialize [2021-11-25 19:32:04,646 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-25 19:32:04,646 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-25 19:32:04,646 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_flash_word [2021-11-25 19:32:04,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_flash_word [2021-11-25 19:32:04,646 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_subqueue [2021-11-25 19:32:04,646 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_subqueue [2021-11-25 19:32:04,647 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 19:32:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 19:32:04,647 INFO L130 BoogieDeclarations]: Found specification of procedure ql_release_adapter_resources [2021-11-25 19:32:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_release_adapter_resources [2021-11-25 19:32:04,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:32:04,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:32:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure csum_tcpudp_magic [2021-11-25 19:32:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure csum_tcpudp_magic [2021-11-25 19:32:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work_sync [2021-11-25 19:32:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work_sync [2021-11-25 19:32:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 19:32:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 19:32:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_rx_resources [2021-11-25 19:32:04,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_rx_resources [2021-11-25 19:32:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-25 19:32:04,649 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-25 19:32:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-25 19:32:04,649 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-25 19:32:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-25 19:32:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-25 19:32:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2021-11-25 19:32:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2021-11-25 19:32:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-25 19:32:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-25 19:32:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-25 19:32:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_on [2021-11-25 19:32:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_on [2021-11-25 19:32:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_set_multicast_list [2021-11-25 19:32:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_set_multicast_list [2021-11-25 19:32:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mpi_mutex_of_ql_adapter [2021-11-25 19:32:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mpi_mutex_of_ql_adapter [2021-11-25 19:32:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 19:32:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 19:32:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:32:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:32:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2021-11-25 19:32:04,653 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2021-11-25 19:32:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-25 19:32:04,653 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-25 19:32:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-25 19:32:04,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-25 19:32:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure ql_tx_ring_clean [2021-11-25 19:32:04,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_tx_ring_clean [2021-11-25 19:32:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 19:32:04,654 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 19:32:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:32:04,654 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:32:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_mpi_reg [2021-11-25 19:32:04,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_mpi_reg [2021-11-25 19:32:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-25 19:32:04,655 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-25 19:32:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 19:32:04,655 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 19:32:04,655 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-25 19:32:04,655 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-25 19:32:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_subqueue [2021-11-25 19:32:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_subqueue [2021-11-25 19:32:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 19:32:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 19:32:04,656 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-25 19:32:04,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-25 19:32:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:32:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 19:32:04,657 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 19:32:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-25 19:32:04,657 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-25 19:32:04,657 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 19:32:04,658 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 19:32:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:32:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-25 19:32:04,658 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-25 19:32:04,658 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_suspend [2021-11-25 19:32:04,658 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_suspend [2021-11-25 19:32:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-25 19:32:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-25 19:32:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:32:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure ql_validate_flash [2021-11-25 19:32:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_validate_flash [2021-11-25 19:32:04,659 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-25 19:32:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-25 19:32:04,660 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cancel_all_work_sync [2021-11-25 19:32:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cancel_all_work_sync [2021-11-25 19:32:04,660 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 19:32:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 19:32:04,660 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 19:32:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 19:32:04,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-25 19:32:04,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-25 19:32:04,661 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_8000_flash_params [2021-11-25 19:32:04,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_8000_flash_params [2021-11-25 19:32:04,661 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2021-11-25 19:32:04,661 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2021-11-25 19:32:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2021-11-25 19:32:04,662 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2021-11-25 19:32:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-25 19:32:04,662 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-25 19:32:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 19:32:04,662 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 19:32:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-25 19:32:04,663 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-25 19:32:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_initialize [2021-11-25 19:32:04,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_initialize [2021-11-25 19:32:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-25 19:32:04,663 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-25 19:32:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-25 19:32:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-25 19:32:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:32:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:32:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-25 19:32:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-25 19:32:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_db_reg [2021-11-25 19:32:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_db_reg [2021-11-25 19:32:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:32:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:32:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:32:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:32:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:32:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2021-11-25 19:32:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2021-11-25 19:32:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 19:32:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 19:32:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 19:32:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 19:32:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure ql_queue_fw_error [2021-11-25 19:32:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_queue_fw_error [2021-11-25 19:32:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ql_unmap_send [2021-11-25 19:32:04,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_unmap_send [2021-11-25 19:32:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-25 19:32:04,667 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-25 19:32:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mpi_handler [2021-11-25 19:32:04,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mpi_handler [2021-11-25 19:32:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-25 19:32:04,668 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-25 19:32:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mb_set_mgmnt_traffic_ctl [2021-11-25 19:32:04,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mb_set_mgmnt_traffic_ctl [2021-11-25 19:32:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_reg_rdy [2021-11-25 19:32:04,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_reg_rdy [2021-11-25 19:32:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_routing_reg [2021-11-25 19:32:04,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_routing_reg [2021-11-25 19:32:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-25 19:32:04,669 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-25 19:32:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-25 19:32:04,669 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-25 19:32:04,669 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_cfg [2021-11-25 19:32:04,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_cfg [2021-11-25 19:32:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure ql_lbq_block_size [2021-11-25 19:32:04,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_lbq_block_size [2021-11-25 19:32:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 19:32:04,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 19:32:04,670 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-25 19:32:04,670 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-25 19:32:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure netif_get_num_default_rss_queues [2021-11-25 19:32:04,671 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_get_num_default_rss_queues [2021-11-25 19:32:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_cfg [2021-11-25 19:32:04,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_cfg [2021-11-25 19:32:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 19:32:04,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 19:32:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 19:32:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 19:32:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:32:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read32 [2021-11-25 19:32:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read32 [2021-11-25 19:32:04,672 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2021-11-25 19:32:04,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2021-11-25 19:32:04,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 19:32:04,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 19:32:04,673 INFO L130 BoogieDeclarations]: Found specification of procedure netpoll_trap [2021-11-25 19:32:04,673 INFO L138 BoogieDeclarations]: Found implementation of procedure netpoll_trap [2021-11-25 19:32:04,673 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2021-11-25 19:32:04,673 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2021-11-25 19:32:04,674 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_resume [2021-11-25 19:32:04,674 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_resume [2021-11-25 19:32:05,815 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:32:05,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:32:27,713 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:32:30,855 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:32:30,855 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:32:30,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:30 BoogieIcfgContainer [2021-11-25 19:32:30,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:32:30,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:32:30,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:32:30,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:32:30,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:31:56" (1/3) ... [2021-11-25 19:32:30,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d106085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:30, skipping insertion in model container [2021-11-25 19:32:30,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:03" (2/3) ... [2021-11-25 19:32:30,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d106085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:30, skipping insertion in model container [2021-11-25 19:32:30,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:30" (3/3) ... [2021-11-25 19:32:30,890 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2021-11-25 19:32:30,898 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:32:30,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:32:30,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:32:31,013 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:32:31,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:32:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 2331 states, 1410 states have (on average 1.304255319148936) internal successors, (1839), 1455 states have internal predecessors, (1839), 748 states have call successors, (748), 171 states have call predecessors, (748), 171 states have return successors, (748), 740 states have call predecessors, (748), 748 states have call successors, (748) [2021-11-25 19:32:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:32:31,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:31,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:31,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2039623180, now seen corresponding path program 1 times [2021-11-25 19:32:31,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309975173] [2021-11-25 19:32:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:31,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:32,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:32,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309975173] [2021-11-25 19:32:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309975173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:32,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:32:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824727660] [2021-11-25 19:32:32,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:32:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:32:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:32:32,388 INFO L87 Difference]: Start difference. First operand has 2331 states, 1410 states have (on average 1.304255319148936) internal successors, (1839), 1455 states have internal predecessors, (1839), 748 states have call successors, (748), 171 states have call predecessors, (748), 171 states have return successors, (748), 740 states have call predecessors, (748), 748 states have call successors, (748) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:34,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:37,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:32:39,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:43,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:44,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:46,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:48,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:51,613 INFO L93 Difference]: Finished difference Result 6183 states and 8875 transitions. [2021-11-25 19:32:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:32:51,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-25 19:32:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:51,689 INFO L225 Difference]: With dead ends: 6183 [2021-11-25 19:32:51,689 INFO L226 Difference]: Without dead ends: 3839 [2021-11-25 19:32:51,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:32:51,726 INFO L933 BasicCegarLoop]: 3668 mSDtfsCounter, 3290 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 5534 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:51,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3296 Valid, 5534 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 800 Invalid, 4 Unknown, 0 Unchecked, 18.8s Time] [2021-11-25 19:32:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2021-11-25 19:32:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3831. [2021-11-25 19:32:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 2336 states have (on average 1.3035102739726028) internal successors, (3045), 2410 states have internal predecessors, (3045), 1198 states have call successors, (1198), 298 states have call predecessors, (1198), 296 states have return successors, (1197), 1176 states have call predecessors, (1197), 1193 states have call successors, (1197) [2021-11-25 19:32:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 5440 transitions. [2021-11-25 19:32:52,089 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 5440 transitions. Word has length 13 [2021-11-25 19:32:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:52,090 INFO L470 AbstractCegarLoop]: Abstraction has 3831 states and 5440 transitions. [2021-11-25 19:32:52,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 5440 transitions. [2021-11-25 19:32:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:32:52,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:52,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:52,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:32:52,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1198559672, now seen corresponding path program 1 times [2021-11-25 19:32:52,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751419976] [2021-11-25 19:32:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:52,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:52,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751419976] [2021-11-25 19:32:52,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751419976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:52,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:52,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:32:52,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409830562] [2021-11-25 19:32:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:32:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:32:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:32:52,573 INFO L87 Difference]: Start difference. First operand 3831 states and 5440 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:53,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:32:56,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:32:59,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:03,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:05,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:07,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:10,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:12,455 INFO L93 Difference]: Finished difference Result 7207 states and 10269 transitions. [2021-11-25 19:33:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:33:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-25 19:33:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:12,539 INFO L225 Difference]: With dead ends: 7207 [2021-11-25 19:33:12,539 INFO L226 Difference]: Without dead ends: 7203 [2021-11-25 19:33:12,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:33:12,551 INFO L933 BasicCegarLoop]: 3954 mSDtfsCounter, 3049 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 6793 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:12,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 6793 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 913 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2021-11-25 19:33:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-11-25 19:33:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 7199. [2021-11-25 19:33:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 4380 states have (on average 1.3) internal successors, (5694), 4514 states have internal predecessors, (5694), 2253 states have call successors, (2253), 576 states have call predecessors, (2253), 565 states have return successors, (2313), 2200 states have call predecessors, (2313), 2247 states have call successors, (2313) [2021-11-25 19:33:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 10260 transitions. [2021-11-25 19:33:13,223 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 10260 transitions. Word has length 14 [2021-11-25 19:33:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:13,224 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 10260 transitions. [2021-11-25 19:33:13,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:33:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 10260 transitions. [2021-11-25 19:33:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:33:13,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:13,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:33:13,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:33:13,225 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1496991887, now seen corresponding path program 1 times [2021-11-25 19:33:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148093128] [2021-11-25 19:33:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:13,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:13,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:13,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148093128] [2021-11-25 19:33:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148093128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:33:13,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:33:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:33:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389060179] [2021-11-25 19:33:13,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:33:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:33:13,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:33:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:33:13,658 INFO L87 Difference]: Start difference. First operand 7199 states and 10260 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:33:16,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:33:19,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:22,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:24,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:27,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:30,611 INFO L93 Difference]: Finished difference Result 7209 states and 10271 transitions. [2021-11-25 19:33:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:33:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-25 19:33:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:30,676 INFO L225 Difference]: With dead ends: 7209 [2021-11-25 19:33:30,676 INFO L226 Difference]: Without dead ends: 7200 [2021-11-25 19:33:30,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:33:30,694 INFO L933 BasicCegarLoop]: 3642 mSDtfsCounter, 3266 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 5492 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:30,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3272 Valid, 5492 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 799 Invalid, 4 Unknown, 0 Unchecked, 16.7s Time] [2021-11-25 19:33:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7200 states. [2021-11-25 19:33:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7200 to 7192. [2021-11-25 19:33:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7192 states, 4376 states have (on average 1.2989031078610602) internal successors, (5684), 4509 states have internal predecessors, (5684), 2250 states have call successors, (2250), 575 states have call predecessors, (2250), 565 states have return successors, (2312), 2199 states have call predecessors, (2312), 2246 states have call successors, (2312) [2021-11-25 19:33:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7192 states to 7192 states and 10246 transitions. [2021-11-25 19:33:31,284 INFO L78 Accepts]: Start accepts. Automaton has 7192 states and 10246 transitions. Word has length 15 [2021-11-25 19:33:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:31,285 INFO L470 AbstractCegarLoop]: Abstraction has 7192 states and 10246 transitions. [2021-11-25 19:33:31,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:33:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7192 states and 10246 transitions. [2021-11-25 19:33:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 19:33:31,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:31,306 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:33:31,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:33:31,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1257461477, now seen corresponding path program 1 times [2021-11-25 19:33:31,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578865835] [2021-11-25 19:33:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:31,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:33:31,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578865835] [2021-11-25 19:33:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578865835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:33:31,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:33:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:33:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285753066] [2021-11-25 19:33:31,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:33:31,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:33:31,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:33:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:33:31,906 INFO L87 Difference]: Start difference. First operand 7192 states and 10246 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:33:35,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:33:38,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:41,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:43,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:46,568 INFO L93 Difference]: Finished difference Result 7611 states and 10832 transitions. [2021-11-25 19:33:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:33:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2021-11-25 19:33:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:46,636 INFO L225 Difference]: With dead ends: 7611 [2021-11-25 19:33:46,636 INFO L226 Difference]: Without dead ends: 7608 [2021-11-25 19:33:46,644 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:33:46,645 INFO L933 BasicCegarLoop]: 3085 mSDtfsCounter, 542 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 5749 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:46,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 5749 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 837 Invalid, 4 Unknown, 0 Unchecked, 14.5s Time] [2021-11-25 19:33:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7608 states. [2021-11-25 19:33:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7608 to 7608. [2021-11-25 19:33:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 4631 states have (on average 1.3040380047505937) internal successors, (6039), 4767 states have internal predecessors, (6039), 2363 states have call successors, (2363), 623 states have call predecessors, (2363), 613 states have return successors, (2426), 2311 states have call predecessors, (2426), 2360 states have call successors, (2426) [2021-11-25 19:33:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 10828 transitions. [2021-11-25 19:33:47,294 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 10828 transitions. Word has length 64 [2021-11-25 19:33:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:47,296 INFO L470 AbstractCegarLoop]: Abstraction has 7608 states and 10828 transitions. [2021-11-25 19:33:47,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:33:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 10828 transitions. [2021-11-25 19:33:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:33:47,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:47,308 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:33:47,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:33:47,309 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash -468478387, now seen corresponding path program 1 times [2021-11-25 19:33:47,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:47,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820508361] [2021-11-25 19:33:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:47,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:33:48,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820508361] [2021-11-25 19:33:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820508361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:33:48,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:33:48,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:33:48,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412553518] [2021-11-25 19:33:48,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:33:48,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:33:48,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:33:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:33:48,169 INFO L87 Difference]: Start difference. First operand 7608 states and 10828 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-25 19:33:50,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:33:53,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:33:58,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:00,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:03,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:05,924 INFO L93 Difference]: Finished difference Result 10961 states and 15665 transitions. [2021-11-25 19:34:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:34:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2021-11-25 19:34:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:06,012 INFO L225 Difference]: With dead ends: 10961 [2021-11-25 19:34:06,013 INFO L226 Difference]: Without dead ends: 10958 [2021-11-25 19:34:06,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:34:06,022 INFO L933 BasicCegarLoop]: 3936 mSDtfsCounter, 2981 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 6774 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:06,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 6774 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 905 Invalid, 5 Unknown, 0 Unchecked, 17.3s Time] [2021-11-25 19:34:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10958 states. [2021-11-25 19:34:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10958 to 10935. [2021-11-25 19:34:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10935 states, 6649 states have (on average 1.3015491051285908) internal successors, (8654), 6847 states have internal predecessors, (8654), 3405 states have call successors, (3405), 894 states have call predecessors, (3405), 880 states have return successors, (3572), 3325 states have call predecessors, (3572), 3402 states have call successors, (3572) [2021-11-25 19:34:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10935 states to 10935 states and 15631 transitions. [2021-11-25 19:34:06,590 INFO L78 Accepts]: Start accepts. Automaton has 10935 states and 15631 transitions. Word has length 82 [2021-11-25 19:34:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:06,591 INFO L470 AbstractCegarLoop]: Abstraction has 10935 states and 15631 transitions. [2021-11-25 19:34:06,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-25 19:34:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10935 states and 15631 transitions. [2021-11-25 19:34:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:34:06,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:06,603 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:34:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:34:06,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1700166541, now seen corresponding path program 1 times [2021-11-25 19:34:06,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337747817] [2021-11-25 19:34:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:06,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:06,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:34:06,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092664392] [2021-11-25 19:34:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:06,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:06,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:06,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:34:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 8148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:34:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:09,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:09,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337747817] [2021-11-25 19:34:09,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:34:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092664392] [2021-11-25 19:34:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092664392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:09,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:09,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:34:09,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301202233] [2021-11-25 19:34:09,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:09,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:34:09,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:34:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:34:09,628 INFO L87 Difference]: Start difference. First operand 10935 states and 15631 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:34:14,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:34:17,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:23,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:26,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:28,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:32,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:37,846 INFO L93 Difference]: Finished difference Result 21967 states and 31946 transitions. [2021-11-25 19:34:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:34:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 99 [2021-11-25 19:34:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:37,904 INFO L225 Difference]: With dead ends: 21967 [2021-11-25 19:34:37,905 INFO L226 Difference]: Without dead ends: 10965 [2021-11-25 19:34:38,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:34:38,005 INFO L933 BasicCegarLoop]: 2874 mSDtfsCounter, 14 mSDsluCounter, 9805 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 20 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11418 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:38,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11418 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1802 Invalid, 5 Unknown, 0 Unchecked, 27.6s Time] [2021-11-25 19:34:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-11-25 19:34:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10965. [2021-11-25 19:34:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 6661 states have (on average 1.3007055997597958) internal successors, (8664), 6865 states have internal predecessors, (8664), 3417 states have call successors, (3417), 894 states have call predecessors, (3417), 886 states have return successors, (3590), 3337 states have call predecessors, (3590), 3414 states have call successors, (3590) [2021-11-25 19:34:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 15671 transitions. [2021-11-25 19:34:38,555 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 15671 transitions. Word has length 99 [2021-11-25 19:34:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:38,556 INFO L470 AbstractCegarLoop]: Abstraction has 10965 states and 15671 transitions. [2021-11-25 19:34:38,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:34:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 15671 transitions. [2021-11-25 19:34:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 19:34:38,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:38,567 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:34:38,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:34:38,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:38,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 416192068, now seen corresponding path program 1 times [2021-11-25 19:34:38,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:38,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345521740] [2021-11-25 19:34:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:38,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:39,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:34:39,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142790802] [2021-11-25 19:34:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:39,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:39,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:39,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:34:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 8150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:34:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:41,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:41,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345521740] [2021-11-25 19:34:41,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:34:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142790802] [2021-11-25 19:34:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142790802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:41,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:41,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:34:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362807741] [2021-11-25 19:34:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:41,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:34:41,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:34:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:34:41,523 INFO L87 Difference]: Start difference. First operand 10965 states and 15671 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:34:43,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:48,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:34:52,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:54,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:34:58,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:01,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:02,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:09,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:13,158 INFO L93 Difference]: Finished difference Result 22027 states and 32026 transitions. [2021-11-25 19:35:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:35:13,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 100 [2021-11-25 19:35:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:13,222 INFO L225 Difference]: With dead ends: 22027 [2021-11-25 19:35:13,222 INFO L226 Difference]: Without dead ends: 10995 [2021-11-25 19:35:13,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:35:13,283 INFO L933 BasicCegarLoop]: 2863 mSDtfsCounter, 34 mSDsluCounter, 13043 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 29 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 14230 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:13,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 14230 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2272 Invalid, 5 Unknown, 0 Unchecked, 31.1s Time] [2021-11-25 19:35:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10995 states. [2021-11-25 19:35:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10995 to 10965. [2021-11-25 19:35:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 6661 states have (on average 1.300105089325927) internal successors, (8660), 6865 states have internal predecessors, (8660), 3417 states have call successors, (3417), 894 states have call predecessors, (3417), 886 states have return successors, (3590), 3337 states have call predecessors, (3590), 3414 states have call successors, (3590) [2021-11-25 19:35:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 15667 transitions. [2021-11-25 19:35:13,809 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 15667 transitions. Word has length 100 [2021-11-25 19:35:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:13,810 INFO L470 AbstractCegarLoop]: Abstraction has 10965 states and 15667 transitions. [2021-11-25 19:35:13,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:35:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 15667 transitions. [2021-11-25 19:35:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 19:35:13,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:13,839 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:35:13,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:14,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:14,063 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1508360742, now seen corresponding path program 1 times [2021-11-25 19:35:14,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:35:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372899851] [2021-11-25 19:35:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:14,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:35:14,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:35:14,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000003115] [2021-11-25 19:35:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:14,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:14,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:35:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:35:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 8094 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:35:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:16,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:35:16,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:35:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372899851] [2021-11-25 19:35:16,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:35:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000003115] [2021-11-25 19:35:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000003115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:35:16,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:35:16,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:35:16,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113987512] [2021-11-25 19:35:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:35:16,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:35:16,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:35:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:35:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:35:16,785 INFO L87 Difference]: Start difference. First operand 10965 states and 15667 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 19:35:20,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:35:24,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:29,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:31,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:32,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:34,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:36,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:43,105 INFO L93 Difference]: Finished difference Result 22019 states and 32067 transitions. [2021-11-25 19:35:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:35:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2021-11-25 19:35:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:43,172 INFO L225 Difference]: With dead ends: 22019 [2021-11-25 19:35:43,172 INFO L226 Difference]: Without dead ends: 11061 [2021-11-25 19:35:43,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:35:43,223 INFO L933 BasicCegarLoop]: 2891 mSDtfsCounter, 5 mSDsluCounter, 9926 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11555 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:43,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 11555 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1699 Invalid, 3 Unknown, 0 Unchecked, 25.8s Time] [2021-11-25 19:35:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11061 states. [2021-11-25 19:35:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11061 to 10997. [2021-11-25 19:35:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10997 states, 6685 states have (on average 1.2990276738967839) internal successors, (8684), 6889 states have internal predecessors, (8684), 3417 states have call successors, (3417), 894 states have call predecessors, (3417), 894 states have return successors, (3604), 3345 states have call predecessors, (3604), 3414 states have call successors, (3604) [2021-11-25 19:35:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10997 states to 10997 states and 15705 transitions. [2021-11-25 19:35:43,755 INFO L78 Accepts]: Start accepts. Automaton has 10997 states and 15705 transitions. Word has length 96 [2021-11-25 19:35:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:43,756 INFO L470 AbstractCegarLoop]: Abstraction has 10997 states and 15705 transitions. [2021-11-25 19:35:43,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 19:35:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 10997 states and 15705 transitions. [2021-11-25 19:35:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 19:35:43,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:43,770 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:35:43,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:43,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:35:43,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -469166440, now seen corresponding path program 1 times [2021-11-25 19:35:43,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:35:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742792149] [2021-11-25 19:35:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:43,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:35:44,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:35:44,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886859851] [2021-11-25 19:35:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:44,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:44,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:44,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:35:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:35:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 8152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:35:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:46,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:35:46,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:35:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742792149] [2021-11-25 19:35:46,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:35:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886859851] [2021-11-25 19:35:46,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886859851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:35:46,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:35:46,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:35:46,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907241125] [2021-11-25 19:35:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:35:46,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:35:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:35:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:35:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:35:46,669 INFO L87 Difference]: Start difference. First operand 10997 states and 15705 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:35:48,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:35:53,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:35:56,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:03,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:05,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:08,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:10,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:17,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:21,679 INFO L93 Difference]: Finished difference Result 22113 states and 32107 transitions. [2021-11-25 19:36:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:36:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2021-11-25 19:36:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:21,753 INFO L225 Difference]: With dead ends: 22113 [2021-11-25 19:36:21,753 INFO L226 Difference]: Without dead ends: 11093 [2021-11-25 19:36:21,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:36:21,824 INFO L933 BasicCegarLoop]: 2862 mSDtfsCounter, 35 mSDsluCounter, 13045 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14227 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:21,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 14227 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2279 Invalid, 6 Unknown, 0 Unchecked, 34.5s Time] [2021-11-25 19:36:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11093 states. [2021-11-25 19:36:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11093 to 11093. [2021-11-25 19:36:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11093 states, 6745 states have (on average 1.2978502594514456) internal successors, (8754), 6949 states have internal predecessors, (8754), 3441 states have call successors, (3441), 900 states have call predecessors, (3441), 906 states have return successors, (3646), 3375 states have call predecessors, (3646), 3438 states have call successors, (3646) [2021-11-25 19:36:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11093 states to 11093 states and 15841 transitions. [2021-11-25 19:36:22,544 INFO L78 Accepts]: Start accepts. Automaton has 11093 states and 15841 transitions. Word has length 101 [2021-11-25 19:36:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:22,545 INFO L470 AbstractCegarLoop]: Abstraction has 11093 states and 15841 transitions. [2021-11-25 19:36:22,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:36:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11093 states and 15841 transitions. [2021-11-25 19:36:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 19:36:22,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:22,558 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:36:22,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:36:22,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:36:22,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash 81524937, now seen corresponding path program 1 times [2021-11-25 19:36:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:22,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234190041] [2021-11-25 19:36:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:22,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:23,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:36:23,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128512230] [2021-11-25 19:36:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:23,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:23,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:23,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:36:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 8154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:36:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:36:25,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:36:25,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:25,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234190041] [2021-11-25 19:36:25,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:36:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128512230] [2021-11-25 19:36:25,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128512230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:25,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:25,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:36:25,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405397218] [2021-11-25 19:36:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:36:25,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:36:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:36:25,420 INFO L87 Difference]: Start difference. First operand 11093 states and 15841 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:36:27,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:32,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:36:34,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:40,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:43,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:45,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:47,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:50,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:53,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:59,483 INFO L93 Difference]: Finished difference Result 22307 states and 32292 transitions. [2021-11-25 19:36:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:36:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-25 19:36:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:59,549 INFO L225 Difference]: With dead ends: 22307 [2021-11-25 19:36:59,549 INFO L226 Difference]: Without dead ends: 11221 [2021-11-25 19:36:59,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:36:59,612 INFO L933 BasicCegarLoop]: 2860 mSDtfsCounter, 36 mSDsluCounter, 13041 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 33 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 14221 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:59,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 14221 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2274 Invalid, 7 Unknown, 0 Unchecked, 33.6s Time] [2021-11-25 19:36:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11221 states. [2021-11-25 19:37:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11221 to 11221. [2021-11-25 19:37:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11221 states, 6825 states have (on average 1.2967032967032968) internal successors, (8850), 7029 states have internal predecessors, (8850), 3473 states have call successors, (3473), 908 states have call predecessors, (3473), 922 states have return successors, (3706), 3415 states have call predecessors, (3706), 3470 states have call successors, (3706) [2021-11-25 19:37:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11221 states to 11221 states and 16029 transitions. [2021-11-25 19:37:00,232 INFO L78 Accepts]: Start accepts. Automaton has 11221 states and 16029 transitions. Word has length 102 [2021-11-25 19:37:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:00,233 INFO L470 AbstractCegarLoop]: Abstraction has 11221 states and 16029 transitions. [2021-11-25 19:37:00,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:37:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11221 states and 16029 transitions. [2021-11-25 19:37:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 19:37:00,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:00,246 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:37:00,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:00,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:37:00,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2094877507, now seen corresponding path program 1 times [2021-11-25 19:37:00,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:00,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217417130] [2021-11-25 19:37:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:00,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:00,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:37:00,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336310539] [2021-11-25 19:37:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:00,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:00,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:00,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:00,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:37:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 8156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:37:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:37:03,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:03,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217417130] [2021-11-25 19:37:03,282 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:37:03,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336310539] [2021-11-25 19:37:03,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336310539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:03,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:03,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:37:03,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899781336] [2021-11-25 19:37:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:03,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:37:03,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:37:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:37:03,285 INFO L87 Difference]: Start difference. First operand 11221 states and 16029 transitions. Second operand has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:37:04,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:10,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:37:12,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:20,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:22,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:31,568 INFO L93 Difference]: Finished difference Result 22561 states and 32644 transitions. [2021-11-25 19:37:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:37:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-25 19:37:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:31,614 INFO L225 Difference]: With dead ends: 22561 [2021-11-25 19:37:31,614 INFO L226 Difference]: Without dead ends: 11327 [2021-11-25 19:37:31,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:37:31,661 INFO L933 BasicCegarLoop]: 2857 mSDtfsCounter, 31 mSDsluCounter, 16300 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 17061 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:31,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 17061 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2718 Invalid, 4 Unknown, 0 Unchecked, 27.8s Time] [2021-11-25 19:37:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11327 states. [2021-11-25 19:37:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11327 to 11317. [2021-11-25 19:37:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 6885 states have (on average 1.2958605664488017) internal successors, (8922), 7089 states have internal predecessors, (8922), 3497 states have call successors, (3497), 914 states have call predecessors, (3497), 934 states have return successors, (3760), 3445 states have call predecessors, (3760), 3494 states have call successors, (3760) [2021-11-25 19:37:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 16179 transitions. [2021-11-25 19:37:32,333 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 16179 transitions. Word has length 103 [2021-11-25 19:37:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:32,334 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 16179 transitions. [2021-11-25 19:37:32,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:37:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 16179 transitions. [2021-11-25 19:37:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 19:37:32,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:32,347 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:37:32,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:32,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:32,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1383124814, now seen corresponding path program 1 times [2021-11-25 19:37:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476092940] [2021-11-25 19:37:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:32,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:37:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990456708] [2021-11-25 19:37:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:32,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:32,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:37:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 8158 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:37:34,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:37:35,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:35,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476092940] [2021-11-25 19:37:35,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:37:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990456708] [2021-11-25 19:37:35,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990456708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:35,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:35,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:37:35,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446090470] [2021-11-25 19:37:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:35,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:37:35,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:37:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:37:35,174 INFO L87 Difference]: Start difference. First operand 11317 states and 16179 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:37:41,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:44,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:37:46,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:52,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:55,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:57,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:59,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:11,071 INFO L93 Difference]: Finished difference Result 22747 states and 32944 transitions. [2021-11-25 19:38:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:38:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-25 19:38:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:11,128 INFO L225 Difference]: With dead ends: 22747 [2021-11-25 19:38:11,129 INFO L226 Difference]: Without dead ends: 11357 [2021-11-25 19:38:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:38:11,177 INFO L933 BasicCegarLoop]: 2856 mSDtfsCounter, 30 mSDsluCounter, 16302 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17057 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 17057 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2725 Invalid, 3 Unknown, 0 Unchecked, 35.4s Time] [2021-11-25 19:38:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11357 states. [2021-11-25 19:38:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11357 to 11317. [2021-11-25 19:38:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 6885 states have (on average 1.2958605664488017) internal successors, (8922), 7089 states have internal predecessors, (8922), 3497 states have call successors, (3497), 914 states have call predecessors, (3497), 934 states have return successors, (3760), 3445 states have call predecessors, (3760), 3494 states have call successors, (3760) [2021-11-25 19:38:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 16179 transitions. [2021-11-25 19:38:11,908 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 16179 transitions. Word has length 104 [2021-11-25 19:38:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:11,909 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 16179 transitions. [2021-11-25 19:38:11,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 7 states have internal predecessors, (68), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 19:38:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 16179 transitions. [2021-11-25 19:38:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 19:38:11,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:11,924 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:38:11,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:12,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:12,139 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash -240951582, now seen corresponding path program 1 times [2021-11-25 19:38:12,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:12,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123709836] [2021-11-25 19:38:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:12,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270964000] [2021-11-25 19:38:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:12,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:12,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:12,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:38:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 8160 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:38:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:38:14,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:38:14,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123709836] [2021-11-25 19:38:14,749 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270964000] [2021-11-25 19:38:14,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270964000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:14,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:14,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:38:14,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303765104] [2021-11-25 19:38:14,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:14,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:38:14,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:38:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:38:14,751 INFO L87 Difference]: Start difference. First operand 11317 states and 16179 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 19:38:20,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:38:22,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:30,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:32,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:34,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:37,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:48,472 INFO L93 Difference]: Finished difference Result 12655 states and 18463 transitions. [2021-11-25 19:38:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:38:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2021-11-25 19:38:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:48,521 INFO L225 Difference]: With dead ends: 12655 [2021-11-25 19:38:48,521 INFO L226 Difference]: Without dead ends: 12645 [2021-11-25 19:38:48,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:38:48,530 INFO L933 BasicCegarLoop]: 3532 mSDtfsCounter, 478 mSDsluCounter, 15290 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 17029 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:48,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 17029 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2298 Invalid, 4 Unknown, 0 Unchecked, 33.4s Time] [2021-11-25 19:38:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12645 states. [2021-11-25 19:38:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12645 to 11324. [2021-11-25 19:38:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 6889 states have (on average 1.2956887792132386) internal successors, (8926), 7094 states have internal predecessors, (8926), 3498 states have call successors, (3498), 914 states have call predecessors, (3498), 936 states have return successors, (3782), 3447 states have call predecessors, (3782), 3495 states have call successors, (3782) [2021-11-25 19:38:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 16206 transitions. [2021-11-25 19:38:49,165 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 16206 transitions. Word has length 105 [2021-11-25 19:38:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 16206 transitions. [2021-11-25 19:38:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 19:38:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 16206 transitions. [2021-11-25 19:38:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 19:38:49,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:49,181 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:38:49,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:49,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:38:49,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash -482222822, now seen corresponding path program 1 times [2021-11-25 19:38:49,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:49,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782722390] [2021-11-25 19:38:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:49,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:49,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:49,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473495758] [2021-11-25 19:38:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:49,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:49,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:49,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:38:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 8327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:38:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:38:51,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:38:51,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782722390] [2021-11-25 19:38:51,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473495758] [2021-11-25 19:38:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473495758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:51,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:51,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:38:51,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156511744] [2021-11-25 19:38:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:51,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:38:51,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:38:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:38:51,697 INFO L87 Difference]: Start difference. First operand 11324 states and 16206 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:38:53,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:57,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:59,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:39:01,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:04,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:06,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:10,971 INFO L93 Difference]: Finished difference Result 22653 states and 32666 transitions. [2021-11-25 19:39:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:39:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 140 [2021-11-25 19:39:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:11,012 INFO L225 Difference]: With dead ends: 22653 [2021-11-25 19:39:11,012 INFO L226 Difference]: Without dead ends: 11336 [2021-11-25 19:39:11,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:11,048 INFO L933 BasicCegarLoop]: 2880 mSDtfsCounter, 140 mSDsluCounter, 3110 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 5609 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:11,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 5609 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 808 Invalid, 5 Unknown, 0 Unchecked, 18.8s Time] [2021-11-25 19:39:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-11-25 19:39:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 11324. [2021-11-25 19:39:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 6889 states have (on average 1.2948178255189433) internal successors, (8920), 7094 states have internal predecessors, (8920), 3498 states have call successors, (3498), 914 states have call predecessors, (3498), 936 states have return successors, (3782), 3447 states have call predecessors, (3782), 3495 states have call successors, (3782) [2021-11-25 19:39:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 16200 transitions. [2021-11-25 19:39:11,442 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 16200 transitions. Word has length 140 [2021-11-25 19:39:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 16200 transitions. [2021-11-25 19:39:11,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:39:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 16200 transitions. [2021-11-25 19:39:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 19:39:11,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:11,464 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 19:39:11,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:39:11,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:39:11,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1690992738, now seen corresponding path program 1 times [2021-11-25 19:39:11,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:11,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625113905] [2021-11-25 19:39:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:11,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:11,931 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:39:11,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363101423] [2021-11-25 19:39:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:11,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:11,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:39:11,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:39:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 8505 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:39:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:39:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:39:14,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:39:14,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625113905] [2021-11-25 19:39:14,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:39:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363101423] [2021-11-25 19:39:14,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363101423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:14,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:14,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:39:14,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679576311] [2021-11-25 19:39:14,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:14,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:39:14,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:39:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:39:14,596 INFO L87 Difference]: Start difference. First operand 11324 states and 16200 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 19:39:19,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:39:21,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:27,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:33,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:38,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:39:43,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:46,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:39:49,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:52,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:39:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:53,152 INFO L93 Difference]: Finished difference Result 16094 states and 23252 transitions. [2021-11-25 19:39:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:39:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 156 [2021-11-25 19:39:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:53,230 INFO L225 Difference]: With dead ends: 16094 [2021-11-25 19:39:53,230 INFO L226 Difference]: Without dead ends: 16085 [2021-11-25 19:39:53,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:39:53,240 INFO L933 BasicCegarLoop]: 2646 mSDtfsCounter, 4689 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 4930 mSolverCounterSat, 2922 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5446 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 7857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2922 IncrementalHoareTripleChecker+Valid, 4930 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:53,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5446 Valid, 4226 Invalid, 7857 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2922 Valid, 4930 Invalid, 5 Unknown, 0 Unchecked, 37.9s Time] [2021-11-25 19:39:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16085 states. [2021-11-25 19:39:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16085 to 13836. [2021-11-25 19:39:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13836 states, 8496 states have (on average 1.2967278719397364) internal successors, (11017), 8762 states have internal predecessors, (11017), 4237 states have call successors, (4237), 1029 states have call predecessors, (4237), 1102 states have return successors, (4658), 4224 states have call predecessors, (4658), 4234 states have call successors, (4658) [2021-11-25 19:39:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13836 states to 13836 states and 19912 transitions. [2021-11-25 19:39:53,835 INFO L78 Accepts]: Start accepts. Automaton has 13836 states and 19912 transitions. Word has length 156 [2021-11-25 19:39:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:53,836 INFO L470 AbstractCegarLoop]: Abstraction has 13836 states and 19912 transitions. [2021-11-25 19:39:53,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 19:39:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13836 states and 19912 transitions. [2021-11-25 19:39:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-25 19:39:53,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:53,879 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:53,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:39:54,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:39:54,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1053204014, now seen corresponding path program 1 times [2021-11-25 19:39:54,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:54,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540131918] [2021-11-25 19:39:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:54,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-25 19:39:54,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540131918] [2021-11-25 19:39:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540131918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:39:54,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:39:54,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:39:54,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169338608] [2021-11-25 19:39:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:39:54,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:39:54,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:39:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:39:54,956 INFO L87 Difference]: Start difference. First operand 13836 states and 19912 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 19:39:57,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:00,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:02,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:40:06,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:07,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:14,526 INFO L93 Difference]: Finished difference Result 19788 states and 28746 transitions. [2021-11-25 19:40:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:40:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 252 [2021-11-25 19:40:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:14,615 INFO L225 Difference]: With dead ends: 19788 [2021-11-25 19:40:14,615 INFO L226 Difference]: Without dead ends: 19779 [2021-11-25 19:40:14,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:40:14,627 INFO L933 BasicCegarLoop]: 4050 mSDtfsCounter, 2971 mSDsluCounter, 3242 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2971 SdHoareTripleChecker+Valid, 6887 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:14,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2971 Valid, 6887 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 937 Invalid, 4 Unknown, 0 Unchecked, 19.0s Time] [2021-11-25 19:40:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19779 states. [2021-11-25 19:40:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19779 to 19735. [2021-11-25 19:40:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19735 states, 12074 states have (on average 1.2945171442769587) internal successors, (15630), 12455 states have internal predecessors, (15630), 6095 states have call successors, (6095), 1468 states have call predecessors, (6095), 1565 states have return successors, (6916), 6064 states have call predecessors, (6916), 6092 states have call successors, (6916) [2021-11-25 19:40:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19735 states to 19735 states and 28641 transitions. [2021-11-25 19:40:15,478 INFO L78 Accepts]: Start accepts. Automaton has 19735 states and 28641 transitions. Word has length 252 [2021-11-25 19:40:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:15,479 INFO L470 AbstractCegarLoop]: Abstraction has 19735 states and 28641 transitions. [2021-11-25 19:40:15,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 19:40:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19735 states and 28641 transitions. [2021-11-25 19:40:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-25 19:40:15,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:15,513 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:15,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:40:15,513 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash 766267554, now seen corresponding path program 1 times [2021-11-25 19:40:15,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363088097] [2021-11-25 19:40:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:15,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:15,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:40:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306278686] [2021-11-25 19:40:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:15,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:15,780 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:15,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:40:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 9706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:40:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-25 19:40:18,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:40:18,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:18,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363088097] [2021-11-25 19:40:18,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:40:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306278686] [2021-11-25 19:40:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306278686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:18,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:40:18,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958246127] [2021-11-25 19:40:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:18,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:40:18,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:40:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:40:18,854 INFO L87 Difference]: Start difference. First operand 19735 states and 28641 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:40:23,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:25,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:40:30,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:31,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:39,518 INFO L93 Difference]: Finished difference Result 39541 states and 58113 transitions. [2021-11-25 19:40:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:40:39,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 277 [2021-11-25 19:40:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:39,595 INFO L225 Difference]: With dead ends: 39541 [2021-11-25 19:40:39,596 INFO L226 Difference]: Without dead ends: 19813 [2021-11-25 19:40:39,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:40:39,656 INFO L933 BasicCegarLoop]: 2878 mSDtfsCounter, 7 mSDsluCounter, 6583 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8622 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:39,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 8622 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1279 Invalid, 3 Unknown, 0 Unchecked, 19.8s Time] [2021-11-25 19:40:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19813 states. [2021-11-25 19:40:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19813 to 19785. [2021-11-25 19:40:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19785 states, 12112 states have (on average 1.2935931307793924) internal successors, (15668), 12499 states have internal predecessors, (15668), 6101 states have call successors, (6101), 1468 states have call predecessors, (6101), 1571 states have return successors, (6937), 6070 states have call predecessors, (6937), 6098 states have call successors, (6937) [2021-11-25 19:40:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19785 states to 19785 states and 28706 transitions. [2021-11-25 19:40:40,485 INFO L78 Accepts]: Start accepts. Automaton has 19785 states and 28706 transitions. Word has length 277 [2021-11-25 19:40:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:40,486 INFO L470 AbstractCegarLoop]: Abstraction has 19785 states and 28706 transitions. [2021-11-25 19:40:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:40:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19785 states and 28706 transitions. [2021-11-25 19:40:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-25 19:40:40,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:40,520 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:40,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:40,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:40:40,733 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 969413157, now seen corresponding path program 1 times [2021-11-25 19:40:40,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:40,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314671277] [2021-11-25 19:40:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:40,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:40,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:40:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282513511] [2021-11-25 19:40:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:40,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:40,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:41,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:40:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 9851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:40:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-25 19:40:44,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:40:44,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314671277] [2021-11-25 19:40:44,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:40:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282513511] [2021-11-25 19:40:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282513511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:44,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:40:44,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838998631] [2021-11-25 19:40:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:40:44,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:40:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:40:44,329 INFO L87 Difference]: Start difference. First operand 19785 states and 28706 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:40:46,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:50,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:52,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:40:55,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:58,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:40:59,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:06,213 INFO L93 Difference]: Finished difference Result 39667 states and 58269 transitions. [2021-11-25 19:41:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 304 [2021-11-25 19:41:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:06,295 INFO L225 Difference]: With dead ends: 39667 [2021-11-25 19:41:06,296 INFO L226 Difference]: Without dead ends: 19889 [2021-11-25 19:41:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:06,374 INFO L933 BasicCegarLoop]: 2880 mSDtfsCounter, 11 mSDsluCounter, 6589 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8630 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 8630 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1267 Invalid, 4 Unknown, 0 Unchecked, 21.2s Time] [2021-11-25 19:41:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19889 states. [2021-11-25 19:41:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19889 to 19811. [2021-11-25 19:41:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19811 states, 12138 states have (on average 1.2929642445213378) internal successors, (15694), 12525 states have internal predecessors, (15694), 6101 states have call successors, (6101), 1468 states have call predecessors, (6101), 1571 states have return successors, (6937), 6070 states have call predecessors, (6937), 6098 states have call successors, (6937) [2021-11-25 19:41:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19811 states to 19811 states and 28732 transitions. [2021-11-25 19:41:07,247 INFO L78 Accepts]: Start accepts. Automaton has 19811 states and 28732 transitions. Word has length 304 [2021-11-25 19:41:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:07,247 INFO L470 AbstractCegarLoop]: Abstraction has 19811 states and 28732 transitions. [2021-11-25 19:41:07,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:41:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19811 states and 28732 transitions. [2021-11-25 19:41:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-25 19:41:07,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:07,294 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:07,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:07,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:41:07,494 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash -373135599, now seen corresponding path program 1 times [2021-11-25 19:41:07,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990296602] [2021-11-25 19:41:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:07,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:07,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637201771] [2021-11-25 19:41:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:07,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:07,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:07,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:41:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 9862 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:41:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-25 19:41:11,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:11,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:11,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990296602] [2021-11-25 19:41:11,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:11,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637201771] [2021-11-25 19:41:11,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637201771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:11,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:11,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:41:11,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912136377] [2021-11-25 19:41:11,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:11,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:11,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:11,212 INFO L87 Difference]: Start difference. First operand 19811 states and 28732 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:41:13,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:17,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:41:19,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:21,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:25,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:26,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:28,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:32,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:35,845 INFO L93 Difference]: Finished difference Result 39745 states and 58362 transitions. [2021-11-25 19:41:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 308 [2021-11-25 19:41:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:35,922 INFO L225 Difference]: With dead ends: 39745 [2021-11-25 19:41:35,922 INFO L226 Difference]: Without dead ends: 19941 [2021-11-25 19:41:35,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:35,989 INFO L933 BasicCegarLoop]: 2879 mSDtfsCounter, 15 mSDsluCounter, 6589 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8629 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8629 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1267 Invalid, 5 Unknown, 0 Unchecked, 23.9s Time] [2021-11-25 19:41:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19941 states. [2021-11-25 19:41:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19941 to 19837. [2021-11-25 19:41:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19837 states, 12164 states have (on average 1.2923380466951662) internal successors, (15720), 12551 states have internal predecessors, (15720), 6101 states have call successors, (6101), 1468 states have call predecessors, (6101), 1571 states have return successors, (6937), 6070 states have call predecessors, (6937), 6098 states have call successors, (6937) [2021-11-25 19:41:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19837 states to 19837 states and 28758 transitions. [2021-11-25 19:41:36,837 INFO L78 Accepts]: Start accepts. Automaton has 19837 states and 28758 transitions. Word has length 308 [2021-11-25 19:41:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:36,838 INFO L470 AbstractCegarLoop]: Abstraction has 19837 states and 28758 transitions. [2021-11-25 19:41:36,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-25 19:41:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 19837 states and 28758 transitions. [2021-11-25 19:41:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-25 19:41:36,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:36,900 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:36,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:37,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:37,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1047990768, now seen corresponding path program 1 times [2021-11-25 19:41:37,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:37,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106144612] [2021-11-25 19:41:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:37,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:37,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12647708] [2021-11-25 19:41:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:37,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:37,389 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:37,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:41:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 10229 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 19:41:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-11-25 19:41:41,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:41:41,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106144612] [2021-11-25 19:41:41,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12647708] [2021-11-25 19:41:41,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12647708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:41,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:41,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:41:41,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763461618] [2021-11-25 19:41:41,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:41,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:41,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:41,121 INFO L87 Difference]: Start difference. First operand 19837 states and 28758 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 19:41:46,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:41:48,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:41:54,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:00,480 INFO L93 Difference]: Finished difference Result 20232 states and 29381 transitions. [2021-11-25 19:42:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:42:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 366 [2021-11-25 19:42:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:00,550 INFO L225 Difference]: With dead ends: 20232 [2021-11-25 19:42:00,550 INFO L226 Difference]: Without dead ends: 20223 [2021-11-25 19:42:00,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:42:00,560 INFO L933 BasicCegarLoop]: 2325 mSDtfsCounter, 3330 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 2211 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3640 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2211 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:00,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3640 Valid, 2846 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2211 Valid, 2177 Invalid, 3 Unknown, 0 Unchecked, 18.8s Time] [2021-11-25 19:42:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20223 states. [2021-11-25 19:42:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20223 to 20167. [2021-11-25 19:42:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20167 states, 12405 states have (on average 1.2926239419588876) internal successors, (16035), 12791 states have internal predecessors, (16035), 6182 states have call successors, (6182), 1465 states have call predecessors, (6182), 1579 states have return successors, (7019), 6165 states have call predecessors, (7019), 6181 states have call successors, (7019) [2021-11-25 19:42:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20167 states to 20167 states and 29236 transitions. [2021-11-25 19:42:01,303 INFO L78 Accepts]: Start accepts. Automaton has 20167 states and 29236 transitions. Word has length 366 [2021-11-25 19:42:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:01,304 INFO L470 AbstractCegarLoop]: Abstraction has 20167 states and 29236 transitions. [2021-11-25 19:42:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 19:42:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20167 states and 29236 transitions. [2021-11-25 19:42:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-25 19:42:01,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:01,348 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:01,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:01,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:01,548 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 736694247, now seen corresponding path program 1 times [2021-11-25 19:42:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:01,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984106015] [2021-11-25 19:42:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:01,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2021-11-25 19:42:02,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:02,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984106015] [2021-11-25 19:42:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984106015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:02,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:02,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:42:02,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684973563] [2021-11-25 19:42:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:02,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:42:02,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:42:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:42:02,317 INFO L87 Difference]: Start difference. First operand 20167 states and 29236 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2021-11-25 19:42:04,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:08,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:42:10,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:12,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:17,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:19,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:20,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:26,482 INFO L93 Difference]: Finished difference Result 40459 states and 59628 transitions. [2021-11-25 19:42:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:42:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) Word has length 465 [2021-11-25 19:42:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:26,680 INFO L225 Difference]: With dead ends: 40459 [2021-11-25 19:42:26,681 INFO L226 Difference]: Without dead ends: 20299 [2021-11-25 19:42:26,750 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:42:26,751 INFO L933 BasicCegarLoop]: 2867 mSDtfsCounter, 17 mSDsluCounter, 6541 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8572 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:26,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 8572 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1279 Invalid, 4 Unknown, 0 Unchecked, 23.2s Time] [2021-11-25 19:42:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20299 states. [2021-11-25 19:42:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20299 to 20299. [2021-11-25 19:42:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20299 states, 12489 states have (on average 1.2916166226279127) internal successors, (16131), 12875 states have internal predecessors, (16131), 6218 states have call successors, (6218), 1477 states have call predecessors, (6218), 1591 states have return successors, (7067), 6201 states have call predecessors, (7067), 6217 states have call successors, (7067) [2021-11-25 19:42:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20299 states to 20299 states and 29416 transitions. [2021-11-25 19:42:27,621 INFO L78 Accepts]: Start accepts. Automaton has 20299 states and 29416 transitions. Word has length 465 [2021-11-25 19:42:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:27,621 INFO L470 AbstractCegarLoop]: Abstraction has 20299 states and 29416 transitions. [2021-11-25 19:42:27,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2021-11-25 19:42:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 20299 states and 29416 transitions. [2021-11-25 19:42:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-11-25 19:42:27,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:27,664 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:27,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 19:42:27,664 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1403862963, now seen corresponding path program 1 times [2021-11-25 19:42:27,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766959171] [2021-11-25 19:42:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:27,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-11-25 19:42:28,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766959171] [2021-11-25 19:42:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766959171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817320694] [2021-11-25 19:42:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:28,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:28,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:28,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:42:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 10853 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 19:42:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-25 19:42:32,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-25 19:42:34,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817320694] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:34,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:42:34,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-11-25 19:42:34,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820148737] [2021-11-25 19:42:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:34,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:42:34,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:42:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:42:34,183 INFO L87 Difference]: Start difference. First operand 20299 states and 29416 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-25 19:42:36,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:41,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:42:47,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:51,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:53,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:42:58,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:02,003 INFO L93 Difference]: Finished difference Result 24400 states and 35717 transitions. [2021-11-25 19:43:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) Word has length 470 [2021-11-25 19:43:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:02,146 INFO L225 Difference]: With dead ends: 24400 [2021-11-25 19:43:02,146 INFO L226 Difference]: Without dead ends: 24387 [2021-11-25 19:43:02,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 937 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:43:02,170 INFO L933 BasicCegarLoop]: 3401 mSDtfsCounter, 5754 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 3522 mSolverCounterSat, 2025 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6250 SdHoareTripleChecker+Valid, 4434 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2025 IncrementalHoareTripleChecker+Valid, 3522 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:02,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6250 Valid, 4434 Invalid, 5552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2025 Valid, 3522 Invalid, 5 Unknown, 0 Unchecked, 27.0s Time] [2021-11-25 19:43:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24387 states. [2021-11-25 19:43:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24387 to 24325. [2021-11-25 19:43:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24325 states, 14950 states have (on average 1.2901003344481605) internal successors, (19287), 15451 states have internal predecessors, (19287), 7482 states have call successors, (7482), 1704 states have call predecessors, (7482), 1892 states have return successors, (8839), 7512 states have call predecessors, (8839), 7481 states have call successors, (8839) [2021-11-25 19:43:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24325 states to 24325 states and 35608 transitions. [2021-11-25 19:43:03,221 INFO L78 Accepts]: Start accepts. Automaton has 24325 states and 35608 transitions. Word has length 470 [2021-11-25 19:43:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:03,221 INFO L470 AbstractCegarLoop]: Abstraction has 24325 states and 35608 transitions. [2021-11-25 19:43:03,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-25 19:43:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24325 states and 35608 transitions. [2021-11-25 19:43:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-25 19:43:03,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:03,284 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:03,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:03,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 19:43:03,488 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1877050363, now seen corresponding path program 1 times [2021-11-25 19:43:03,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:03,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739936637] [2021-11-25 19:43:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:03,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-25 19:43:04,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:04,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739936637] [2021-11-25 19:43:04,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739936637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:04,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289896082] [2021-11-25 19:43:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:04,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:04,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:04,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:04,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:43:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 11590 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 19:43:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-25 19:43:08,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-11-25 19:43:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289896082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:10,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:43:10,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-11-25 19:43:10,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449718090] [2021-11-25 19:43:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:10,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:10,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:43:10,930 INFO L87 Difference]: Start difference. First operand 24325 states and 35608 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 4 states have call successors, (77), 4 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2021-11-25 19:43:13,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:17,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:19,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:43:28,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:35,516 INFO L93 Difference]: Finished difference Result 25707 states and 37651 transitions. [2021-11-25 19:43:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 4 states have call successors, (77), 4 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 545 [2021-11-25 19:43:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:35,618 INFO L225 Difference]: With dead ends: 25707 [2021-11-25 19:43:35,618 INFO L226 Difference]: Without dead ends: 25694 [2021-11-25 19:43:35,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1087 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:43:35,633 INFO L933 BasicCegarLoop]: 3397 mSDtfsCounter, 5759 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 2044 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6255 SdHoareTripleChecker+Valid, 4407 SdHoareTripleChecker+Invalid, 5573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2044 IncrementalHoareTripleChecker+Valid, 3525 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:35,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6255 Valid, 4407 Invalid, 5573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2044 Valid, 3525 Invalid, 4 Unknown, 0 Unchecked, 23.7s Time] [2021-11-25 19:43:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25694 states. [2021-11-25 19:43:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25694 to 24914. [2021-11-25 19:43:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 15308 states have (on average 1.289913770577476) internal successors, (19746), 15819 states have internal predecessors, (19746), 7647 states have call successors, (7647), 1768 states have call predecessors, (7647), 1958 states have return successors, (8968), 7678 states have call predecessors, (8968), 7646 states have call successors, (8968) [2021-11-25 19:43:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 36361 transitions. [2021-11-25 19:43:36,746 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 36361 transitions. Word has length 545 [2021-11-25 19:43:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:36,747 INFO L470 AbstractCegarLoop]: Abstraction has 24914 states and 36361 transitions. [2021-11-25 19:43:36,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 4 states have call successors, (77), 4 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2021-11-25 19:43:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 36361 transitions. [2021-11-25 19:43:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-11-25 19:43:36,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:36,823 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 9, 8, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:36,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 19:43:37,024 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash 12983885, now seen corresponding path program 1 times [2021-11-25 19:43:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782330623] [2021-11-25 19:43:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:37,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:37,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:43:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853327367] [2021-11-25 19:43:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:37,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:37,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:37,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 19:43:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 12729 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 19:43:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2021-11-25 19:43:42,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2021-11-25 19:43:45,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782330623] [2021-11-25 19:43:45,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:43:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853327367] [2021-11-25 19:43:45,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853327367] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:45,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:43:45,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-25 19:43:45,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239274860] [2021-11-25 19:43:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:45,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:45,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:43:45,302 INFO L87 Difference]: Start difference. First operand 24914 states and 36361 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 4 states have call successors, (74), 4 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2021-11-25 19:43:48,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:43:50,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:55,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:58,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:44:02,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:44:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:11,921 INFO L93 Difference]: Finished difference Result 39002 states and 58230 transitions. [2021-11-25 19:44:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:44:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 4 states have call successors, (74), 4 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) Word has length 650 [2021-11-25 19:44:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:12,108 INFO L225 Difference]: With dead ends: 39002 [2021-11-25 19:44:12,108 INFO L226 Difference]: Without dead ends: 38979 [2021-11-25 19:44:12,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1295 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:44:12,127 INFO L933 BasicCegarLoop]: 3378 mSDtfsCounter, 4334 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 773 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4823 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:12,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4823 Valid, 4718 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 3781 Invalid, 5 Unknown, 0 Unchecked, 25.4s Time] [2021-11-25 19:44:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38979 states. [2021-11-25 19:44:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38979 to 38662. [2021-11-25 19:44:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38662 states, 23676 states have (on average 1.2873373880723096) internal successors, (30479), 24522 states have internal predecessors, (30479), 11941 states have call successors, (11941), 2676 states have call predecessors, (11941), 3044 states have return successors, (15285), 12059 states have call predecessors, (15285), 11940 states have call successors, (15285) [2021-11-25 19:44:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38662 states to 38662 states and 57705 transitions. [2021-11-25 19:44:13,787 INFO L78 Accepts]: Start accepts. Automaton has 38662 states and 57705 transitions. Word has length 650 [2021-11-25 19:44:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 38662 states and 57705 transitions. [2021-11-25 19:44:13,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 4 states have call successors, (74), 4 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2021-11-25 19:44:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38662 states and 57705 transitions. [2021-11-25 19:44:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-11-25 19:44:14,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:14,119 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:14,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:44:14,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:14,340 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1453882098, now seen corresponding path program 1 times [2021-11-25 19:44:14,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:14,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093160192] [2021-11-25 19:44:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:14,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:14,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:44:14,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124296026] [2021-11-25 19:44:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:14,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:14,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:14,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd7e9608-7a2a-48b5-9a07-a4b577489876/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:44:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 11520 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 19:44:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-25 19:44:18,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:44:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2021-11-25 19:44:20,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:20,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093160192] [2021-11-25 19:44:20,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:44:20,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124296026] [2021-11-25 19:44:20,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124296026] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:20,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:44:20,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-25 19:44:20,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480690224] [2021-11-25 19:44:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:20,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:44:20,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:44:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:44:20,934 INFO L87 Difference]: Start difference. First operand 38662 states and 57705 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 4 states have call successors, (66), 4 states have call predecessors, (66), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2021-11-25 19:44:24,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:44:26,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:44:31,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:44:33,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:44:36,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []