./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.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_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/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_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/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_74944de9-1da0-4721-956e-aa5a3c15acc9/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 ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:36:23,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:36:23,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:36:23,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:36:23,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:36:23,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:36:23,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:36:23,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:36:23,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:36:23,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:36:23,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:36:23,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:36:23,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:36:23,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:36:23,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:36:23,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:36:23,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:36:23,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:36:23,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:36:23,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:36:23,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:36:23,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:36:23,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:36:23,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:36:23,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:36:23,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:36:23,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:36:23,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:36:23,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:36:23,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:36:23,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:36:23,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:36:23,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:36:23,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:36:23,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:36:23,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:36:23,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:36:23,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:36:23,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:36:23,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:36:23,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:36:23,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:36:23,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:36:23,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:36:23,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:36:23,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:36:23,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:36:23,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:36:23,603 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:36:23,603 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:36:23,603 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:36:23,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:36:23,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:36:23,605 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:36:23,605 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:36:23,605 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:36:23,606 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:36:23,606 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:36:23,606 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:36:23,606 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:36:23,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:36:23,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:36:23,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:36:23,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:36:23,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:36:23,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:36:23,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:36:23,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:36:23,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:36:23,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:36:23,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:36:23,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:23,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:36:23,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:36:23,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:36:23,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:36:23,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:36:23,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:36:23,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:36:23,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:36:23,613 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_74944de9-1da0-4721-956e-aa5a3c15acc9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-25 19:36:23,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:36:23,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:36:23,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:36:23,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:36:23,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:36:23,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-25 19:36:24,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/data/453742882/bf9966b01bf34bf4b9a7509b1a34b684/FLAGefea03a53 [2021-11-25 19:36:24,935 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:36:24,936 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-25 19:36:24,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/data/453742882/bf9966b01bf34bf4b9a7509b1a34b684/FLAGefea03a53 [2021-11-25 19:36:25,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/data/453742882/bf9966b01bf34bf4b9a7509b1a34b684 [2021-11-25 19:36:25,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:36:25,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:36:25,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:25,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:36:25,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:36:25,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:25" (1/1) ... [2021-11-25 19:36:25,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef0425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:25, skipping insertion in model container [2021-11-25 19:36:25,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:36:25" (1/1) ... [2021-11-25 19:36:25,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:36:25,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:36:27,634 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_74944de9-1da0-4721-956e-aa5a3c15acc9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-25 19:36:27,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:27,771 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:36:28,250 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_74944de9-1da0-4721-956e-aa5a3c15acc9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-25 19:36:28,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:36:28,449 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:36:28,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28 WrapperNode [2021-11-25 19:36:28,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:36:28,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:28,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:36:28,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:36:28,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,767 INFO L137 Inliner]: procedures = 373, calls = 2971, calls flagged for inlining = 172, calls inlined = 164, statements flattened = 5915 [2021-11-25 19:36:28,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:36:28,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:36:28,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:36:28,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:36:28,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:28,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:29,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:29,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:29,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:36:29,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:36:29,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:36:29,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:36:29,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (1/1) ... [2021-11-25 19:36:29,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:36:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:29,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:36:29,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:36:29,232 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2021-11-25 19:36:29,232 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2021-11-25 19:36:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2021-11-25 19:36:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2021-11-25 19:36:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2021-11-25 19:36:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2021-11-25 19:36:29,233 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-25 19:36:29,233 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-25 19:36:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 19:36:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 19:36:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-25 19:36:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-25 19:36:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-25 19:36:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-25 19:36:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-25 19:36:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-25 19:36:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-11-25 19:36:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-11-25 19:36:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-25 19:36:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-25 19:36:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-25 19:36:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-25 19:36:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-25 19:36:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-25 19:36:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-25 19:36:29,236 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-25 19:36:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-25 19:36:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-25 19:36:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:36:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:36:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-25 19:36:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-25 19:36:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-25 19:36:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-25 19:36:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2021-11-25 19:36:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2021-11-25 19:36:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-25 19:36:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-25 19:36:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 19:36:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 19:36:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-25 19:36:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-25 19:36:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:36:29,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:36:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-25 19:36:29,240 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-25 19:36:29,240 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2021-11-25 19:36:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2021-11-25 19:36:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-25 19:36:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-25 19:36:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2021-11-25 19:36:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2021-11-25 19:36:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-25 19:36:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-25 19:36:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 19:36:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 19:36:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_get_by_index [2021-11-25 19:36:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_get_by_index [2021-11-25 19:36:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2021-11-25 19:36:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2021-11-25 19:36:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2021-11-25 19:36:29,245 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2021-11-25 19:36:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-25 19:36:29,245 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-25 19:36:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-25 19:36:29,245 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-25 19:36:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-25 19:36:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2021-11-25 19:36:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 19:36:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 19:36:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-25 19:36:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-25 19:36:29,247 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 19:36:29,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-25 19:36:29,247 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 19:36:29,247 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 19:36:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:36:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 19:36:29,248 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 19:36:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-25 19:36:29,248 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-25 19:36:29,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2021-11-25 19:36:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2021-11-25 19:36:29,249 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-25 19:36:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-25 19:36:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-25 19:36:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-25 19:36:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-25 19:36:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-25 19:36:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2021-11-25 19:36:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2021-11-25 19:36:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:36:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-25 19:36:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-25 19:36:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 19:36:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-25 19:36:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-25 19:36:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-25 19:36:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-25 19:36:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 19:36:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 19:36:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-25 19:36:29,253 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-25 19:36:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:36:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:36:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2021-11-25 19:36:29,254 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2021-11-25 19:36:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-25 19:36:29,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-25 19:36:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-25 19:36:29,255 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-25 19:36:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-25 19:36:29,258 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-25 19:36:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-25 19:36:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-25 19:36:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 19:36:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 19:36:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2021-11-25 19:36:29,261 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2021-11-25 19:36:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-25 19:36:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-25 19:36:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 19:36:29,268 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 19:36:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-25 19:36:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-25 19:36:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-25 19:36:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-25 19:36:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2021-11-25 19:36:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2021-11-25 19:36:29,269 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 19:36:29,269 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 19:36:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-25 19:36:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-25 19:36:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-25 19:36:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-25 19:36:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-25 19:36:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-25 19:36:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-25 19:36:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-25 19:36:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 19:36:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 19:36:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2021-11-25 19:36:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2021-11-25 19:36:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-25 19:36:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-25 19:36:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-25 19:36:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-25 19:36:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-25 19:36:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-25 19:36:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2021-11-25 19:36:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2021-11-25 19:36:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-25 19:36:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-25 19:36:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:36:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2021-11-25 19:36:29,273 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2021-11-25 19:36:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-25 19:36:29,273 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-25 19:36:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 19:36:29,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 19:36:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2021-11-25 19:36:29,274 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2021-11-25 19:36:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2021-11-25 19:36:29,274 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2021-11-25 19:36:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:36:29,274 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:36:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-25 19:36:29,275 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-25 19:36:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-25 19:36:29,275 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-25 19:36:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-25 19:36:29,275 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-25 19:36:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:36:29,275 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:36:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-25 19:36:29,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-25 19:36:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:36:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-25 19:36:29,276 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-25 19:36:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-25 19:36:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-25 19:36:29,276 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-25 19:36:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:36:29,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:36:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-25 19:36:29,277 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-25 19:36:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-25 19:36:29,277 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-25 19:36:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-25 19:36:29,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2021-11-25 19:36:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:36:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2021-11-25 19:36:29,278 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2021-11-25 19:36:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:36:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:36:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 19:36:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:36:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:36:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 19:36:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 19:36:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-25 19:36:29,279 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-25 19:36:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2021-11-25 19:36:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2021-11-25 19:36:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 19:36:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 19:36:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2021-11-25 19:36:29,280 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2021-11-25 19:36:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2021-11-25 19:36:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2021-11-25 19:36:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 19:36:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 19:36:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-25 19:36:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-25 19:36:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2021-11-25 19:36:29,281 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2021-11-25 19:36:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 19:36:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 19:36:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-25 19:36:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-25 19:36:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 19:36:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 19:36:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-25 19:36:29,282 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-25 19:36:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 19:36:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 19:36:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2021-11-25 19:36:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2021-11-25 19:36:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 19:36:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 19:36:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:36:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 19:36:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 19:36:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:36:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:36:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-25 19:36:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-25 19:36:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-25 19:36:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-25 19:36:30,139 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:36:30,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:36:39,103 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:36:40,174 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:36:40,174 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:36:40,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:40 BoogieIcfgContainer [2021-11-25 19:36:40,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:36:40,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:36:40,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:36:40,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:36:40,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:36:25" (1/3) ... [2021-11-25 19:36:40,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59346ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:40, skipping insertion in model container [2021-11-25 19:36:40,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:36:28" (2/3) ... [2021-11-25 19:36:40,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59346ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:36:40, skipping insertion in model container [2021-11-25 19:36:40,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:36:40" (3/3) ... [2021-11-25 19:36:40,192 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-25 19:36:40,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:36:40,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:36:40,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:36:40,274 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 19:36:40,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:36:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 1416 states, 850 states have (on average 1.3235294117647058) internal successors, (1125), 884 states have internal predecessors, (1125), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) [2021-11-25 19:36:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:36:40,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:40,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:40,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash -525182134, now seen corresponding path program 1 times [2021-11-25 19:36:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342502284] [2021-11-25 19:36:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:40,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:40,910 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 19:36:40,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342502284] [2021-11-25 19:36:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342502284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:40,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:40,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:36:40,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008239905] [2021-11-25 19:36:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:40,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:36:40,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:36:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:36:40,950 INFO L87 Difference]: Start difference. First operand has 1416 states, 850 states have (on average 1.3235294117647058) internal successors, (1125), 884 states have internal predecessors, (1125), 452 states have call successors, (452), 112 states have call predecessors, (452), 112 states have return successors, (452), 438 states have call predecessors, (452), 452 states have call successors, (452) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:36:42,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:44,966 WARN L534 Checker$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 19:36:47,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:49,565 WARN L534 Checker$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 19:36:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:50,439 INFO L93 Difference]: Finished difference Result 4012 states and 6021 transitions. [2021-11-25 19:36:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:36:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-25 19:36:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:50,499 INFO L225 Difference]: With dead ends: 4012 [2021-11-25 19:36:50,500 INFO L226 Difference]: Without dead ends: 2620 [2021-11-25 19:36:50,522 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 19:36:50,533 INFO L933 BasicCegarLoop]: 2327 mSDtfsCounter, 1874 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 4000 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:50,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 4000 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 536 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-11-25 19:36:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-11-25 19:36:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2615. [2021-11-25 19:36:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 1573 states have (on average 1.3204068658614112) internal successors, (2077), 1634 states have internal predecessors, (2077), 829 states have call successors, (829), 220 states have call predecessors, (829), 212 states have return successors, (892), 777 states have call predecessors, (892), 813 states have call successors, (892) [2021-11-25 19:36:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3798 transitions. [2021-11-25 19:36:50,842 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3798 transitions. Word has length 23 [2021-11-25 19:36:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3798 transitions. [2021-11-25 19:36:50,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:36:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3798 transitions. [2021-11-25 19:36:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:36:50,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:50,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:50,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:36:50,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash 897309236, now seen corresponding path program 1 times [2021-11-25 19:36:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531681314] [2021-11-25 19:36:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:50,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:51,260 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 19:36:51,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531681314] [2021-11-25 19:36:51,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531681314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:51,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:51,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:36:51,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180932619] [2021-11-25 19:36:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:51,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:36:51,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:36:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:36:51,267 INFO L87 Difference]: Start difference. First operand 2615 states and 3798 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:36:53,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:36:56,675 WARN L534 Checker$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 19:36:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:36:57,359 INFO L93 Difference]: Finished difference Result 5118 states and 7424 transitions. [2021-11-25 19:36:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:36:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-25 19:36:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:36:57,407 INFO L225 Difference]: With dead ends: 5118 [2021-11-25 19:36:57,407 INFO L226 Difference]: Without dead ends: 5115 [2021-11-25 19:36:57,411 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 19:36:57,413 INFO L933 BasicCegarLoop]: 2251 mSDtfsCounter, 1863 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:36:57,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 3995 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-25 19:36:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2021-11-25 19:36:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 5092. [2021-11-25 19:36:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 3058 states have (on average 1.3201438848920863) internal successors, (4037), 3171 states have internal predecessors, (4037), 1611 states have call successors, (1611), 436 states have call predecessors, (1611), 422 states have return successors, (1751), 1516 states have call predecessors, (1751), 1593 states have call successors, (1751) [2021-11-25 19:36:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7399 transitions. [2021-11-25 19:36:57,702 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7399 transitions. Word has length 24 [2021-11-25 19:36:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:36:57,703 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 7399 transitions. [2021-11-25 19:36:57,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:36:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7399 transitions. [2021-11-25 19:36:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:36:57,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:36:57,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:36:57,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:36:57,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:36:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:36:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2044873613, now seen corresponding path program 1 times [2021-11-25 19:36:57,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:36:57,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833376736] [2021-11-25 19:36:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:36:57,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:36:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:57,887 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 19:36:57,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:57,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833376736] [2021-11-25 19:36:57,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833376736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:36:57,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:36:57,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:36:57,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029081664] [2021-11-25 19:36:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:36:57,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:36:57,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:57,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:36:57,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:36:57,890 INFO L87 Difference]: Start difference. First operand 5092 states and 7399 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:00,207 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 19:37:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:03,193 INFO L93 Difference]: Finished difference Result 5119 states and 7425 transitions. [2021-11-25 19:37:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-11-25 19:37:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:03,240 INFO L225 Difference]: With dead ends: 5119 [2021-11-25 19:37:03,240 INFO L226 Difference]: Without dead ends: 5116 [2021-11-25 19:37:03,244 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 19:37:03,246 INFO L933 BasicCegarLoop]: 2236 mSDtfsCounter, 1860 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1860 Valid, 3983 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 528 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:37:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-11-25 19:37:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5093. [2021-11-25 19:37:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5093 states, 3059 states have (on average 1.3200392285060478) internal successors, (4038), 3172 states have internal predecessors, (4038), 1611 states have call successors, (1611), 436 states have call predecessors, (1611), 422 states have return successors, (1751), 1516 states have call predecessors, (1751), 1593 states have call successors, (1751) [2021-11-25 19:37:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5093 states to 5093 states and 7400 transitions. [2021-11-25 19:37:03,587 INFO L78 Accepts]: Start accepts. Automaton has 5093 states and 7400 transitions. Word has length 25 [2021-11-25 19:37:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:03,587 INFO L470 AbstractCegarLoop]: Abstraction has 5093 states and 7400 transitions. [2021-11-25 19:37:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5093 states and 7400 transitions. [2021-11-25 19:37:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:37:03,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:03,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:03,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:37:03,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1035331497, now seen corresponding path program 1 times [2021-11-25 19:37:03,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791634412] [2021-11-25 19:37:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:03,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:03,846 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 19:37:03,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791634412] [2021-11-25 19:37:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791634412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:03,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456721407] [2021-11-25 19:37:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:03,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:37:03,852 INFO L87 Difference]: Start difference. First operand 5093 states and 7400 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:06,473 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 19:37:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:08,587 INFO L93 Difference]: Finished difference Result 7001 states and 10189 transitions. [2021-11-25 19:37:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-25 19:37:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:08,644 INFO L225 Difference]: With dead ends: 7001 [2021-11-25 19:37:08,645 INFO L226 Difference]: Without dead ends: 6977 [2021-11-25 19:37:08,650 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 19:37:08,651 INFO L933 BasicCegarLoop]: 2211 mSDtfsCounter, 1868 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 3578 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:08,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1868 Valid, 3578 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 19:37:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2021-11-25 19:37:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 6959. [2021-11-25 19:37:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6959 states, 4173 states have (on average 1.3177570093457944) internal successors, (5499), 4346 states have internal predecessors, (5499), 2183 states have call successors, (2183), 632 states have call predecessors, (2183), 602 states have return successors, (2456), 2025 states have call predecessors, (2456), 2164 states have call successors, (2456) [2021-11-25 19:37:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 10138 transitions. [2021-11-25 19:37:09,089 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 10138 transitions. Word has length 26 [2021-11-25 19:37:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 6959 states and 10138 transitions. [2021-11-25 19:37:09,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 10138 transitions. [2021-11-25 19:37:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:37:09,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:09,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:09,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:37:09,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1825918809, now seen corresponding path program 1 times [2021-11-25 19:37:09,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:09,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095289442] [2021-11-25 19:37:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:09,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:09,810 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 19:37:09,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095289442] [2021-11-25 19:37:09,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095289442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:09,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:09,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:09,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928614635] [2021-11-25 19:37:09,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:09,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:09,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:37:09,815 INFO L87 Difference]: Start difference. First operand 6959 states and 10138 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:12,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:15,466 WARN L534 Checker$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 19:37:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:16,670 INFO L93 Difference]: Finished difference Result 13907 states and 20261 transitions. [2021-11-25 19:37:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2021-11-25 19:37:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:16,747 INFO L225 Difference]: With dead ends: 13907 [2021-11-25 19:37:16,747 INFO L226 Difference]: Without dead ends: 6960 [2021-11-25 19:37:16,798 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 19:37:16,800 INFO L933 BasicCegarLoop]: 1762 mSDtfsCounter, 0 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:16,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3522 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 505 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-25 19:37:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6960 states. [2021-11-25 19:37:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6960 to 6960. [2021-11-25 19:37:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6960 states, 4174 states have (on average 1.317680881648299) internal successors, (5500), 4347 states have internal predecessors, (5500), 2183 states have call successors, (2183), 632 states have call predecessors, (2183), 602 states have return successors, (2456), 2025 states have call predecessors, (2456), 2164 states have call successors, (2456) [2021-11-25 19:37:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6960 states to 6960 states and 10139 transitions. [2021-11-25 19:37:17,276 INFO L78 Accepts]: Start accepts. Automaton has 6960 states and 10139 transitions. Word has length 34 [2021-11-25 19:37:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 6960 states and 10139 transitions. [2021-11-25 19:37:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6960 states and 10139 transitions. [2021-11-25 19:37:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:37:17,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:17,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:17,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:37:17,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash -861743498, now seen corresponding path program 1 times [2021-11-25 19:37:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:17,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171346260] [2021-11-25 19:37:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:17,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:17,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171346260] [2021-11-25 19:37:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171346260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008551787] [2021-11-25 19:37:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:17,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:17,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:17,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:17,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:37:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 7844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:37:19,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:20,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:20,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008551787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:20,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:37:20,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:37:20,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931473687] [2021-11-25 19:37:20,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:20,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:20,134 INFO L87 Difference]: Start difference. First operand 6960 states and 10139 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:21,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:23,719 WARN L534 Checker$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 19:37:26,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:27,833 WARN L534 Checker$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 19:37:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:28,998 INFO L93 Difference]: Finished difference Result 11157 states and 16239 transitions. [2021-11-25 19:37:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:28,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2021-11-25 19:37:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:29,043 INFO L225 Difference]: With dead ends: 11157 [2021-11-25 19:37:29,044 INFO L226 Difference]: Without dead ends: 8575 [2021-11-25 19:37:29,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:29,065 INFO L933 BasicCegarLoop]: 2364 mSDtfsCounter, 1987 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1987 SdHoareTripleChecker+Valid, 3915 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:29,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1987 Valid, 3915 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 509 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 19:37:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-11-25 19:37:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8532. [2021-11-25 19:37:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8532 states, 5125 states have (on average 1.3164878048780488) internal successors, (6747), 5329 states have internal predecessors, (6747), 2654 states have call successors, (2654), 788 states have call predecessors, (2654), 752 states have return successors, (3038), 2466 states have call predecessors, (3038), 2636 states have call successors, (3038) [2021-11-25 19:37:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12439 transitions. [2021-11-25 19:37:29,458 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12439 transitions. Word has length 35 [2021-11-25 19:37:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:29,459 INFO L470 AbstractCegarLoop]: Abstraction has 8532 states and 12439 transitions. [2021-11-25 19:37:29,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12439 transitions. [2021-11-25 19:37:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:37:29,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:29,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:29,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:29,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:37:29,689 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -946158456, now seen corresponding path program 1 times [2021-11-25 19:37:29,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:29,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031532583] [2021-11-25 19:37:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:29,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:30,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:30,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031532583] [2021-11-25 19:37:30,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031532583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:30,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806607374] [2021-11-25 19:37:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:30,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:30,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:30,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:37:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 7846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:37:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:32,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806607374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:32,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:37:32,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:37:32,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350652518] [2021-11-25 19:37:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:32,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:32,772 INFO L87 Difference]: Start difference. First operand 8532 states and 12439 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:34,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:36,604 WARN L534 Checker$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 19:37:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:37,814 INFO L93 Difference]: Finished difference Result 8534 states and 12440 transitions. [2021-11-25 19:37:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2021-11-25 19:37:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:37,858 INFO L225 Difference]: With dead ends: 8534 [2021-11-25 19:37:37,858 INFO L226 Difference]: Without dead ends: 8531 [2021-11-25 19:37:37,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:37,866 INFO L933 BasicCegarLoop]: 1759 mSDtfsCounter, 1981 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:37,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1981 Valid, 1760 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 19:37:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2021-11-25 19:37:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 8531. [2021-11-25 19:37:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8531 states, 5125 states have (on average 1.3160975609756098) internal successors, (6745), 5328 states have internal predecessors, (6745), 2653 states have call successors, (2653), 788 states have call predecessors, (2653), 752 states have return successors, (3038), 2466 states have call predecessors, (3038), 2636 states have call successors, (3038) [2021-11-25 19:37:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8531 states to 8531 states and 12436 transitions. [2021-11-25 19:37:38,386 INFO L78 Accepts]: Start accepts. Automaton has 8531 states and 12436 transitions. Word has length 36 [2021-11-25 19:37:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:38,386 INFO L470 AbstractCegarLoop]: Abstraction has 8531 states and 12436 transitions. [2021-11-25 19:37:38,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8531 states and 12436 transitions. [2021-11-25 19:37:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:37:38,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:38,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:38,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:38,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:38,601 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 731950009, now seen corresponding path program 1 times [2021-11-25 19:37:38,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168392570] [2021-11-25 19:37:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:38,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:39,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168392570] [2021-11-25 19:37:39,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168392570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:39,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787540347] [2021-11-25 19:37:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:39,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:39,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:39,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:37:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 7848 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:37:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:41,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:41,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787540347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:41,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:37:41,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:37:41,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748828836] [2021-11-25 19:37:41,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:41,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:41,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:41,549 INFO L87 Difference]: Start difference. First operand 8531 states and 12436 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:44,363 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 19:37:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:45,765 INFO L93 Difference]: Finished difference Result 8533 states and 12437 transitions. [2021-11-25 19:37:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2021-11-25 19:37:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:45,810 INFO L225 Difference]: With dead ends: 8533 [2021-11-25 19:37:45,810 INFO L226 Difference]: Without dead ends: 8501 [2021-11-25 19:37:45,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:45,816 INFO L933 BasicCegarLoop]: 1757 mSDtfsCounter, 1978 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:45,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1978 Valid, 1758 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 19:37:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-11-25 19:37:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 8488. [2021-11-25 19:37:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 5107 states have (on average 1.3162326218915215) internal successors, (6722), 5309 states have internal predecessors, (6722), 2635 states have call successors, (2635), 779 states have call predecessors, (2635), 745 states have return successors, (3023), 2451 states have call predecessors, (3023), 2621 states have call successors, (3023) [2021-11-25 19:37:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 12380 transitions. [2021-11-25 19:37:46,232 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 12380 transitions. Word has length 37 [2021-11-25 19:37:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:46,233 INFO L470 AbstractCegarLoop]: Abstraction has 8488 states and 12380 transitions. [2021-11-25 19:37:46,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 12380 transitions. [2021-11-25 19:37:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:37:46,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:46,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:46,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:46,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:46,445 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1213709739, now seen corresponding path program 1 times [2021-11-25 19:37:46,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:46,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694703174] [2021-11-25 19:37:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:46,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:46,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:46,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694703174] [2021-11-25 19:37:46,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694703174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:46,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900313393] [2021-11-25 19:37:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:46,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:46,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:46,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:37:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 7850 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:37:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:49,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900313393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:49,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:37:49,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:37:49,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972986843] [2021-11-25 19:37:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:37:49,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:37:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:49,906 INFO L87 Difference]: Start difference. First operand 8488 states and 12380 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:50,982 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 19:37:52,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:54,276 WARN L534 Checker$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 19:37:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:55,505 INFO L93 Difference]: Finished difference Result 8526 states and 12405 transitions. [2021-11-25 19:37:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:37:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-11-25 19:37:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:55,556 INFO L225 Difference]: With dead ends: 8526 [2021-11-25 19:37:55,556 INFO L226 Difference]: Without dead ends: 8492 [2021-11-25 19:37:55,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:55,563 INFO L933 BasicCegarLoop]: 1778 mSDtfsCounter, 1834 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:55,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1834 Valid, 1933 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 302 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 19:37:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8492 states. [2021-11-25 19:37:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8492 to 8433. [2021-11-25 19:37:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 5088 states have (on average 1.3166273584905661) internal successors, (6699), 5275 states have internal predecessors, (6699), 2590 states have call successors, (2590), 774 states have call predecessors, (2590), 754 states have return successors, (2959), 2435 states have call predecessors, (2959), 2579 states have call successors, (2959) [2021-11-25 19:37:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 12248 transitions. [2021-11-25 19:37:56,103 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 12248 transitions. Word has length 38 [2021-11-25 19:37:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:56,104 INFO L470 AbstractCegarLoop]: Abstraction has 8433 states and 12248 transitions. [2021-11-25 19:37:56,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:37:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 12248 transitions. [2021-11-25 19:37:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 19:37:56,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:56,109 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] [2021-11-25 19:37:56,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:56,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:56,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash -452610720, now seen corresponding path program 1 times [2021-11-25 19:37:56,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:56,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665395766] [2021-11-25 19:37:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:56,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:56,537 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 19:37:56,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665395766] [2021-11-25 19:37:56,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665395766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:56,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:37:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806416776] [2021-11-25 19:37:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:56,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:56,540 INFO L87 Difference]: Start difference. First operand 8433 states and 12248 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:37:57,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:59,977 WARN L534 Checker$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 19:38:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:03,746 INFO L93 Difference]: Finished difference Result 10994 states and 15929 transitions. [2021-11-25 19:38:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-11-25 19:38:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:03,786 INFO L225 Difference]: With dead ends: 10994 [2021-11-25 19:38:03,787 INFO L226 Difference]: Without dead ends: 8433 [2021-11-25 19:38:03,805 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 19:38:03,806 INFO L933 BasicCegarLoop]: 1749 mSDtfsCounter, 1 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:03,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 5242 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 766 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-25 19:38:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8433 states. [2021-11-25 19:38:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8433 to 8433. [2021-11-25 19:38:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 5088 states have (on average 1.316430817610063) internal successors, (6698), 5275 states have internal predecessors, (6698), 2590 states have call successors, (2590), 774 states have call predecessors, (2590), 754 states have return successors, (2959), 2435 states have call predecessors, (2959), 2579 states have call successors, (2959) [2021-11-25 19:38:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 12247 transitions. [2021-11-25 19:38:04,205 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 12247 transitions. Word has length 46 [2021-11-25 19:38:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:04,206 INFO L470 AbstractCegarLoop]: Abstraction has 8433 states and 12247 transitions. [2021-11-25 19:38:04,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:38:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 12247 transitions. [2021-11-25 19:38:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:38:04,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:04,210 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] [2021-11-25 19:38:04,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:38:04,211 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash -190898489, now seen corresponding path program 1 times [2021-11-25 19:38:04,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:04,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264720149] [2021-11-25 19:38:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:04,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:04,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264720149] [2021-11-25 19:38:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264720149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937784454] [2021-11-25 19:38:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:04,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:04,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:04,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:38:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:38:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:06,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937784454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410702592] [2021-11-25 19:38:06,502 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-25 19:38:06,502 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:06,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:06,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:06,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:12,395 INFO L244 Elim1Store]: Index analysis took 772 ms [2021-11-25 19:39:58,611 WARN L227 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 3072 DAG size of output: 1989 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:39:58,620 INFO L354 Elim1Store]: treesize reduction 3530, result has 45.5 percent of original size [2021-11-25 19:39:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 342 select indices, 342 select index equivalence classes, 58313 disjoint index pairs (out of 58311 index pairs), introduced 342 new quantified variables, introduced 341 case distinctions, treesize of input 1717 treesize of output 3986 [2021-11-25 19:40:02,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-25 19:40:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,194 INFO L244 Elim1Store]: Index analysis took 3551 ms [2021-11-25 19:42:30,994 WARN L227 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 3756 DAG size of output: 2049 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:42:30,999 INFO L354 Elim1Store]: treesize reduction 6138, result has 33.3 percent of original size [2021-11-25 19:42:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 344 select indices, 344 select index equivalence classes, 58655 disjoint index pairs (out of 58996 index pairs), introduced 344 new quantified variables, introduced 682 case distinctions, treesize of input 1727 treesize of output 4117 [2021-11-25 19:42:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-25 19:42:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:35,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 38 select indices, 38 select index equivalence classes, 741 disjoint index pairs (out of 703 index pairs), introduced 38 new quantified variables, introduced 0 case distinctions, treesize of input 1276 treesize of output 1113 [2021-11-25 19:42:37,502 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 311 [2021-11-25 19:42:37,795 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 311 [2021-11-25 19:42:38,178 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 311 [2021-11-25 19:42:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:42:38,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:42:40,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:42:41,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:42:41,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:42:41,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:42:41,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:42:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2021-11-25 19:42:42,530 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 311 [2021-11-25 19:42:42,756 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 311 [2021-11-25 19:42:42,933 INFO L197 IcfgInterpreter]: Interpreting procedure ldv__builtin_expect with input of size 173 for LOIs [2021-11-25 19:42:42,999 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 127 for LOIs [2021-11-25 19:42:43,015 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 139 for LOIs [2021-11-25 19:42:43,037 INFO L197 IcfgInterpreter]: Interpreting procedure put_tty_driver with input of size 129 for LOIs [2021-11-25 19:42:43,054 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 136 for LOIs [2021-11-25 19:42:43,169 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [410702592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:04,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:04,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [4, 4, 4] total 28 [2021-11-25 19:43:04,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895341370] [2021-11-25 19:43:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:43:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:43:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:43:04,861 INFO L87 Difference]: Start difference. First operand 8433 states and 12247 transitions. Second operand has 23 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-25 19:43:06,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:07,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:08,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:11,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:12,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:18,631 WARN L534 Checker$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 19:43:39,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:43,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:43:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:53,143 INFO L93 Difference]: Finished difference Result 8474 states and 12284 transitions. [2021-11-25 19:43:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:43:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-11-25 19:43:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:53,167 INFO L225 Difference]: With dead ends: 8474 [2021-11-25 19:43:53,168 INFO L226 Difference]: Without dead ends: 5908 [2021-11-25 19:43:53,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:43:53,188 INFO L933 BasicCegarLoop]: 1741 mSDtfsCounter, 18 mSDsluCounter, 17426 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17229 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:53,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 17229 Invalid, 4823 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [10 Valid, 4406 Invalid, 1 Unknown, 406 Unchecked, 38.1s Time] [2021-11-25 19:43:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-11-25 19:43:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 5908. [2021-11-25 19:43:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5908 states, 3567 states have (on average 1.3162321278385198) internal successors, (4695), 3702 states have internal predecessors, (4695), 1806 states have call successors, (1806), 549 states have call predecessors, (1806), 534 states have return successors, (2096), 1693 states have call predecessors, (2096), 1795 states have call successors, (2096) [2021-11-25 19:43:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 8597 transitions. [2021-11-25 19:43:53,487 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 8597 transitions. Word has length 54 [2021-11-25 19:43:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:53,487 INFO L470 AbstractCegarLoop]: Abstraction has 5908 states and 8597 transitions. [2021-11-25 19:43:53,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-25 19:43:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 8597 transitions. [2021-11-25 19:43:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:43:53,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:53,490 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] [2021-11-25 19:43:53,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:43:53,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1694537548, now seen corresponding path program 1 times [2021-11-25 19:43:53,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711035365] [2021-11-25 19:43:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:53,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:43:54,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711035365] [2021-11-25 19:43:54,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711035365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765864878] [2021-11-25 19:43:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:54,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:54,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:54,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74944de9-1da0-4721-956e-aa5a3c15acc9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:43:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 7971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:43:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:57,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:43:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765864878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300461835] [2021-11-25 19:43:57,449 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2021-11-25 19:43:57,449 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:57,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:57,450 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:57,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:44:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-25 19:44:02,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:02,767 INFO L244 Elim1Store]: Index analysis took 726 ms [2021-11-25 19:46:37,366 WARN L227 SmtUtils]: Spent 2.57m on a formula simplification. DAG size of input: 3756 DAG size of output: 2049 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:46:37,369 INFO L354 Elim1Store]: treesize reduction 6138, result has 33.3 percent of original size [2021-11-25 19:46:37,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 344 select indices, 344 select index equivalence classes, 58655 disjoint index pairs (out of 58996 index pairs), introduced 344 new quantified variables, introduced 682 case distinctions, treesize of input 1727 treesize of output 4117 [2021-11-25 19:46:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-25 19:46:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 342 select indices, 342 select index equivalence classes, 58654 disjoint index pairs (out of 58311 index pairs), introduced 342 new quantified variables, introduced 0 case distinctions, treesize of input 1717 treesize of output 2742 [2021-11-25 19:46:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:45,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 38 select indices, 38 select index equivalence classes, 741 disjoint index pairs (out of 703 index pairs), introduced 38 new quantified variables, introduced 0 case distinctions, treesize of input 1276 treesize of output 1113 [2021-11-25 19:48:58,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:48:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:49:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:08,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 343 select indices, 343 select index equivalence classes, 58654 disjoint index pairs (out of 58653 index pairs), introduced 343 new quantified variables, introduced 0 case distinctions, treesize of input 1716 treesize of output 1030 [2021-11-25 19:49:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 344 select indices, 344 select index equivalence classes, 58996 disjoint index pairs (out of 58996 index pairs), introduced 344 new quantified variables, introduced 0 case distinctions, treesize of input 1721 treesize of output 1033