./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI --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 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:23,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:23,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:23,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:23,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:23,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:23,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:23,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:23,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:23,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:23,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:23,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:23,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:23,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:23,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:23,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:23,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:23,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:23,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:23,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:23,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:23,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:23,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:23,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:23,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:23,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:23,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:23,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:23,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:23,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:23,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:23,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:23,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:23,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:23,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:23,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:23,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:23,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:23,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:23,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:23,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:23,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:35:23,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:23,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:23,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:23,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:23,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:23,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:23,405 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:23,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:23,406 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:23,406 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:23,407 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:23,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:23,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:23,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:23,408 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:23,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:23,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:23,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:23,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:23,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:23,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:23,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:23,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:23,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:23,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:23,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:23,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:23,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:23,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:23,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:23,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:23,411 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:23,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:23,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2022-11-03 02:35:23,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:23,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:23,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:23,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:23,723 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:23,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:35:23,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/8431ec340/ae621c56ff38440c993aa7e4975eaefa/FLAG36fa646e2 [2022-11-03 02:35:24,532 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:24,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:35:24,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/8431ec340/ae621c56ff38440c993aa7e4975eaefa/FLAG36fa646e2 [2022-11-03 02:35:24,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/8431ec340/ae621c56ff38440c993aa7e4975eaefa [2022-11-03 02:35:24,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:24,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:24,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:24,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:24,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:24,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:24" (1/1) ... [2022-11-03 02:35:24,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237f5128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:24, skipping insertion in model container [2022-11-03 02:35:24,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:24" (1/1) ... [2022-11-03 02:35:24,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:24,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:25,871 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2022-11-03 02:35:25,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:25,931 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:26,258 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2022-11-03 02:35:26,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:26,313 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:26,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26 WrapperNode [2022-11-03 02:35:26,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:26,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:26,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:26,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:26,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,523 INFO L138 Inliner]: procedures = 115, calls = 787, calls flagged for inlining = 53, calls inlined = 52, statements flattened = 1905 [2022-11-03 02:35:26,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:26,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:26,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:26,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:26,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:26,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:26,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:26,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:26,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (1/1) ... [2022-11-03 02:35:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:26,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:26,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:26,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:35:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:35:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:35:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:35:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:35:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:35:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:35:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:35:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:35:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:35:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-03 02:35:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-03 02:35:26,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:35:26,747 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:35:26,747 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:35:26,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:35:26,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:35:26,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:35:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:35:26,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:35:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:35:26,748 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:35:26,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2022-11-03 02:35:26,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2022-11-03 02:35:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:35:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2022-11-03 02:35:26,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2022-11-03 02:35:26,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:35:26,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:35:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:35:26,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:35:26,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2022-11-03 02:35:26,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2022-11-03 02:35:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:35:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:35:26,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:35:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:26,751 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2022-11-03 02:35:26,752 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2022-11-03 02:35:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2022-11-03 02:35:26,752 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2022-11-03 02:35:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:35:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:35:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:35:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2022-11-03 02:35:26,753 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2022-11-03 02:35:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 02:35:26,754 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 02:35:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:35:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:35:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2022-11-03 02:35:26,756 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2022-11-03 02:35:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:35:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:35:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2022-11-03 02:35:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2022-11-03 02:35:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-03 02:35:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-03 02:35:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:35:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:35:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:35:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:35:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:35:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2022-11-03 02:35:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2022-11-03 02:35:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:35:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:27,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:27,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:27,647 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:35:31,813 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:32,368 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:32,369 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:35:32,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:32 BoogieIcfgContainer [2022-11-03 02:35:32,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:32,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:32,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:32,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:32,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:24" (1/3) ... [2022-11-03 02:35:32,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b0902d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:32, skipping insertion in model container [2022-11-03 02:35:32,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:26" (2/3) ... [2022-11-03 02:35:32,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b0902d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:32, skipping insertion in model container [2022-11-03 02:35:32,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:32" (3/3) ... [2022-11-03 02:35:32,381 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:35:32,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:32,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:32,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:32,463 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b31bd40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:32,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 407 states, 266 states have (on average 1.3834586466165413) internal successors, (368), 273 states have internal predecessors, (368), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-11-03 02:35:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:35:32,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:32,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:32,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 850965209, now seen corresponding path program 1 times [2022-11-03 02:35:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613088475] [2022-11-03 02:35:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:35:33,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:33,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613088475] [2022-11-03 02:35:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613088475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:33,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:33,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:33,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417682692] [2022-11-03 02:35:33,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:33,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:33,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:33,288 INFO L87 Difference]: Start difference. First operand has 407 states, 266 states have (on average 1.3834586466165413) internal successors, (368), 273 states have internal predecessors, (368), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:35:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:35,789 INFO L93 Difference]: Finished difference Result 839 states and 1224 transitions. [2022-11-03 02:35:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-03 02:35:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:35,805 INFO L225 Difference]: With dead ends: 839 [2022-11-03 02:35:35,806 INFO L226 Difference]: Without dead ends: 443 [2022-11-03 02:35:35,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:35,815 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 109 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:35,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 885 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:35:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-03 02:35:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-03 02:35:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 299 states have (on average 1.3612040133779264) internal successors, (407), 301 states have internal predecessors, (407), 113 states have call successors, (113), 30 states have call predecessors, (113), 30 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-11-03 02:35:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 633 transitions. [2022-11-03 02:35:35,892 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 633 transitions. Word has length 99 [2022-11-03 02:35:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:35,893 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 633 transitions. [2022-11-03 02:35:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:35:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 633 transitions. [2022-11-03 02:35:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:35:35,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:35,900 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:35,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 494757028, now seen corresponding path program 1 times [2022-11-03 02:35:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:35,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594727379] [2022-11-03 02:35:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-03 02:35:36,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:36,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594727379] [2022-11-03 02:35:36,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594727379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:36,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:36,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211241538] [2022-11-03 02:35:36,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:36,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:36,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:36,329 INFO L87 Difference]: Start difference. First operand 443 states and 633 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:35:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:38,888 INFO L93 Difference]: Finished difference Result 1040 states and 1490 transitions. [2022-11-03 02:35:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 153 [2022-11-03 02:35:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:38,893 INFO L225 Difference]: With dead ends: 1040 [2022-11-03 02:35:38,893 INFO L226 Difference]: Without dead ends: 631 [2022-11-03 02:35:38,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:38,896 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 245 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:38,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 927 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:35:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-03 02:35:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2022-11-03 02:35:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 437 states have (on average 1.334096109839817) internal successors, (583), 440 states have internal predecessors, (583), 143 states have call successors, (143), 48 states have call predecessors, (143), 48 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-03 02:35:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 869 transitions. [2022-11-03 02:35:38,944 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 869 transitions. Word has length 153 [2022-11-03 02:35:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:38,945 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 869 transitions. [2022-11-03 02:35:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:35:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 869 transitions. [2022-11-03 02:35:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 02:35:38,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,951 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:35:38,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1706303792, now seen corresponding path program 1 times [2022-11-03 02:35:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:38,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632895090] [2022-11-03 02:35:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-03 02:35:39,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632895090] [2022-11-03 02:35:39,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632895090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:39,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088555741] [2022-11-03 02:35:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:39,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:39,536 INFO L87 Difference]: Start difference. First operand 629 states and 869 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:35:42,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:42,712 INFO L93 Difference]: Finished difference Result 1214 states and 1677 transitions. [2022-11-03 02:35:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 164 [2022-11-03 02:35:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:42,722 INFO L225 Difference]: With dead ends: 1214 [2022-11-03 02:35:42,722 INFO L226 Difference]: Without dead ends: 1212 [2022-11-03 02:35:42,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:42,724 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 485 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:42,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1073 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:35:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-11-03 02:35:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1211. [2022-11-03 02:35:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 846 states have (on average 1.339243498817967) internal successors, (1133), 853 states have internal predecessors, (1133), 270 states have call successors, (270), 94 states have call predecessors, (270), 94 states have return successors, (270), 269 states have call predecessors, (270), 270 states have call successors, (270) [2022-11-03 02:35:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1673 transitions. [2022-11-03 02:35:42,838 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1673 transitions. Word has length 164 [2022-11-03 02:35:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:42,839 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1673 transitions. [2022-11-03 02:35:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:35:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1673 transitions. [2022-11-03 02:35:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 02:35:42,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:42,843 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:42,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:35:42,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash -880529444, now seen corresponding path program 1 times [2022-11-03 02:35:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:42,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649890601] [2022-11-03 02:35:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-03 02:35:43,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649890601] [2022-11-03 02:35:43,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649890601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22070418] [2022-11-03 02:35:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:43,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:43,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-03 02:35:44,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-03 02:35:44,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22070418] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:44,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:44,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2022-11-03 02:35:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518821914] [2022-11-03 02:35:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:44,281 INFO L87 Difference]: Start difference. First operand 1211 states and 1673 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:35:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:46,446 INFO L93 Difference]: Finished difference Result 2772 states and 3840 transitions. [2022-11-03 02:35:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 170 [2022-11-03 02:35:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:46,456 INFO L225 Difference]: With dead ends: 2772 [2022-11-03 02:35:46,456 INFO L226 Difference]: Without dead ends: 1595 [2022-11-03 02:35:46,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:46,461 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 411 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:46,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 708 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:35:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-11-03 02:35:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2022-11-03 02:35:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1126 states have (on average 1.3605683836589697) internal successors, (1532), 1135 states have internal predecessors, (1532), 330 states have call successors, (330), 136 states have call predecessors, (330), 136 states have return successors, (330), 329 states have call predecessors, (330), 330 states have call successors, (330) [2022-11-03 02:35:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2192 transitions. [2022-11-03 02:35:46,573 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2192 transitions. Word has length 170 [2022-11-03 02:35:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:46,574 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2192 transitions. [2022-11-03 02:35:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:35:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2192 transitions. [2022-11-03 02:35:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-03 02:35:46,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:46,579 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:46,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:46,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:46,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1519650637, now seen corresponding path program 1 times [2022-11-03 02:35:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:46,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111096821] [2022-11-03 02:35:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:35:47,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111096821] [2022-11-03 02:35:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111096821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279205161] [2022-11-03 02:35:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:47,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:47,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:47,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 158 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 02:35:48,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-03 02:35:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279205161] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:48,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:48,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2022-11-03 02:35:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207860929] [2022-11-03 02:35:48,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:48,432 INFO L87 Difference]: Start difference. First operand 1593 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:35:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:49,927 INFO L93 Difference]: Finished difference Result 3664 states and 5076 transitions. [2022-11-03 02:35:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 206 [2022-11-03 02:35:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:49,939 INFO L225 Difference]: With dead ends: 3664 [2022-11-03 02:35:49,939 INFO L226 Difference]: Without dead ends: 2105 [2022-11-03 02:35:49,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:49,944 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 415 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:49,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 722 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:35:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-11-03 02:35:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2103. [2022-11-03 02:35:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 1524 states have (on average 1.3799212598425197) internal successors, (2103), 1537 states have internal predecessors, (2103), 398 states have call successors, (398), 180 states have call predecessors, (398), 180 states have return successors, (398), 397 states have call predecessors, (398), 398 states have call successors, (398) [2022-11-03 02:35:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2899 transitions. [2022-11-03 02:35:50,137 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2899 transitions. Word has length 206 [2022-11-03 02:35:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:50,138 INFO L495 AbstractCegarLoop]: Abstraction has 2103 states and 2899 transitions. [2022-11-03 02:35:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:35:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2899 transitions. [2022-11-03 02:35:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-03 02:35:50,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:50,145 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:50,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:50,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash -78185036, now seen corresponding path program 1 times [2022-11-03 02:35:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681747060] [2022-11-03 02:35:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 02:35:51,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:51,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681747060] [2022-11-03 02:35:51,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681747060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:51,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475674466] [2022-11-03 02:35:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:51,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:51,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:51,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:51,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:35:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 02:35:52,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:52,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475674466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:52,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:52,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:35:52,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485153006] [2022-11-03 02:35:52,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:52,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:52,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:52,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:52,060 INFO L87 Difference]: Start difference. First operand 2103 states and 2899 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:35:55,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:58,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:59,991 INFO L93 Difference]: Finished difference Result 6237 states and 8581 transitions. [2022-11-03 02:35:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:59,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 224 [2022-11-03 02:35:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:00,012 INFO L225 Difference]: With dead ends: 6237 [2022-11-03 02:36:00,012 INFO L226 Difference]: Without dead ends: 4036 [2022-11-03 02:36:00,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:36:00,022 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 520 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:00,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 3211 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-03 02:36:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2022-11-03 02:36:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3943. [2022-11-03 02:36:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 2874 states have (on average 1.3778705636743216) internal successors, (3960), 2885 states have internal predecessors, (3960), 743 states have call successors, (743), 325 states have call predecessors, (743), 325 states have return successors, (743), 732 states have call predecessors, (743), 743 states have call successors, (743) [2022-11-03 02:36:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5446 transitions. [2022-11-03 02:36:00,351 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5446 transitions. Word has length 224 [2022-11-03 02:36:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:00,352 INFO L495 AbstractCegarLoop]: Abstraction has 3943 states and 5446 transitions. [2022-11-03 02:36:00,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:36:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5446 transitions. [2022-11-03 02:36:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-03 02:36:00,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:00,359 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:00,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:36:00,575 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 37320089, now seen corresponding path program 1 times [2022-11-03 02:36:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:00,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024714832] [2022-11-03 02:36:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-11-03 02:36:01,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024714832] [2022-11-03 02:36:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024714832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853351953] [2022-11-03 02:36:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:01,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:01,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:01,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:36:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:36:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 219 proven. 18 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-03 02:36:02,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-11-03 02:36:02,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853351953] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:02,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:36:02,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:36:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725436901] [2022-11-03 02:36:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:02,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:02,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:36:02,784 INFO L87 Difference]: Start difference. First operand 3943 states and 5446 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 02:36:05,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:36:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:06,604 INFO L93 Difference]: Finished difference Result 8941 states and 12467 transitions. [2022-11-03 02:36:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 236 [2022-11-03 02:36:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:06,629 INFO L225 Difference]: With dead ends: 8941 [2022-11-03 02:36:06,629 INFO L226 Difference]: Without dead ends: 5032 [2022-11-03 02:36:06,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:36:06,639 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 523 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:06,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1057 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:36:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2022-11-03 02:36:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 4141. [2022-11-03 02:36:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4141 states, 3060 states have (on average 1.3908496732026143) internal successors, (4256), 3071 states have internal predecessors, (4256), 749 states have call successors, (749), 331 states have call predecessors, (749), 331 states have return successors, (749), 738 states have call predecessors, (749), 749 states have call successors, (749) [2022-11-03 02:36:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4141 states to 4141 states and 5754 transitions. [2022-11-03 02:36:06,908 INFO L78 Accepts]: Start accepts. Automaton has 4141 states and 5754 transitions. Word has length 236 [2022-11-03 02:36:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:06,910 INFO L495 AbstractCegarLoop]: Abstraction has 4141 states and 5754 transitions. [2022-11-03 02:36:06,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 02:36:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4141 states and 5754 transitions. [2022-11-03 02:36:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-03 02:36:06,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:06,917 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:06,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:36:07,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash 820364439, now seen corresponding path program 1 times [2022-11-03 02:36:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:07,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464445577] [2022-11-03 02:36:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-11-03 02:36:08,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464445577] [2022-11-03 02:36:08,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464445577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509914295] [2022-11-03 02:36:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:08,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:08,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:08,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:36:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-03 02:36:08,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:08,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509914295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:08,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:08,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 02:36:08,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135670857] [2022-11-03 02:36:08,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:08,922 INFO L87 Difference]: Start difference. First operand 4141 states and 5754 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:36:11,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:36:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:12,298 INFO L93 Difference]: Finished difference Result 9124 states and 12879 transitions. [2022-11-03 02:36:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:12,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 238 [2022-11-03 02:36:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:12,321 INFO L225 Difference]: With dead ends: 9124 [2022-11-03 02:36:12,322 INFO L226 Difference]: Without dead ends: 5017 [2022-11-03 02:36:12,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:12,333 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 379 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:12,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1158 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:36:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2022-11-03 02:36:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 4605. [2022-11-03 02:36:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 3500 states have (on average 1.3908571428571428) internal successors, (4868), 3511 states have internal predecessors, (4868), 761 states have call successors, (761), 343 states have call predecessors, (761), 343 states have return successors, (761), 750 states have call predecessors, (761), 761 states have call successors, (761) [2022-11-03 02:36:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 6390 transitions. [2022-11-03 02:36:12,695 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 6390 transitions. Word has length 238 [2022-11-03 02:36:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:12,695 INFO L495 AbstractCegarLoop]: Abstraction has 4605 states and 6390 transitions. [2022-11-03 02:36:12,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:36:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 6390 transitions. [2022-11-03 02:36:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-03 02:36:12,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:12,706 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:12,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:12,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:12,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -460643796, now seen corresponding path program 1 times [2022-11-03 02:36:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:12,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520367835] [2022-11-03 02:36:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-11-03 02:36:13,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:13,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520367835] [2022-11-03 02:36:13,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520367835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:13,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661530878] [2022-11-03 02:36:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:13,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:13,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:13,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:36:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-11-03 02:36:15,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661530878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:15,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:15,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2022-11-03 02:36:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729042078] [2022-11-03 02:36:15,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:36:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:36:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:15,004 INFO L87 Difference]: Start difference. First operand 4605 states and 6390 transitions. Second operand has 7 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:36:21,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:36:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:22,361 INFO L93 Difference]: Finished difference Result 10209 states and 14303 transitions. [2022-11-03 02:36:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) Word has length 274 [2022-11-03 02:36:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:22,387 INFO L225 Difference]: With dead ends: 10209 [2022-11-03 02:36:22,387 INFO L226 Difference]: Without dead ends: 5638 [2022-11-03 02:36:22,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:22,398 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 135 mSDsluCounter, 3483 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:22,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 3680 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-03 02:36:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2022-11-03 02:36:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4629. [2022-11-03 02:36:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 3516 states have (on average 1.3890784982935154) internal successors, (4884), 3527 states have internal predecessors, (4884), 761 states have call successors, (761), 343 states have call predecessors, (761), 351 states have return successors, (781), 758 states have call predecessors, (781), 761 states have call successors, (781) [2022-11-03 02:36:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 6426 transitions. [2022-11-03 02:36:22,738 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 6426 transitions. Word has length 274 [2022-11-03 02:36:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:22,739 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 6426 transitions. [2022-11-03 02:36:22,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:36:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 6426 transitions. [2022-11-03 02:36:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 02:36:22,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:22,748 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:22,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:22,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2044380419, now seen corresponding path program 1 times [2022-11-03 02:36:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:22,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686863142] [2022-11-03 02:36:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:22,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2022-11-03 02:36:23,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686863142] [2022-11-03 02:36:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686863142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445229599] [2022-11-03 02:36:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:23,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:23,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:36:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:24,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-03 02:36:24,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445229599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:24,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:24,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 02:36:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40228729] [2022-11-03 02:36:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:24,834 INFO L87 Difference]: Start difference. First operand 4629 states and 6426 transitions. Second operand has 4 states, 3 states have (on average 37.0) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:36:27,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:36:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:28,400 INFO L93 Difference]: Finished difference Result 9238 states and 12829 transitions. [2022-11-03 02:36:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 37.0) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 278 [2022-11-03 02:36:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:28,420 INFO L225 Difference]: With dead ends: 9238 [2022-11-03 02:36:28,420 INFO L226 Difference]: Without dead ends: 4630 [2022-11-03 02:36:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:28,431 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 1 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1440 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:36:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2022-11-03 02:36:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 4630. [2022-11-03 02:36:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 3517 states have (on average 1.3889678703440431) internal successors, (4885), 3528 states have internal predecessors, (4885), 761 states have call successors, (761), 343 states have call predecessors, (761), 351 states have return successors, (781), 758 states have call predecessors, (781), 761 states have call successors, (781) [2022-11-03 02:36:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 6427 transitions. [2022-11-03 02:36:28,701 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 6427 transitions. Word has length 278 [2022-11-03 02:36:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:28,702 INFO L495 AbstractCegarLoop]: Abstraction has 4630 states and 6427 transitions. [2022-11-03 02:36:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 37.0) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:36:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 6427 transitions. [2022-11-03 02:36:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-03 02:36:28,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:28,713 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:28,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:28,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:36:28,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash -917394235, now seen corresponding path program 1 times [2022-11-03 02:36:28,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:28,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51995754] [2022-11-03 02:36:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-11-03 02:36:29,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:29,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51995754] [2022-11-03 02:36:29,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51995754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:29,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888284623] [2022-11-03 02:36:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:29,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:29,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:36:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-03 02:36:30,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:36:31,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888284623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312570652] [2022-11-03 02:36:31,429 INFO L159 IcfgInterpreter]: Started Sifa with 141 locations of interest [2022-11-03 02:36:31,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:31,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:31,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:31,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:51,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:52,135 INFO L244 Elim1Store]: Index analysis took 800 ms [2022-11-03 02:38:59,972 WARN L234 SmtUtils]: Spent 2.13m on a formula simplification. DAG size of input: 3175 DAG size of output: 1416 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:38:59,979 INFO L356 Elim1Store]: treesize reduction 11844, result has 17.5 percent of original size [2022-11-03 02:38:59,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 107 select indices, 107 select index equivalence classes, 5161 disjoint index pairs (out of 5671 index pairs), introduced 107 new quantified variables, introduced 618 case distinctions, treesize of input 594 treesize of output 2897 [2022-11-03 02:39:03,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:03,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 101 select indices, 101 select index equivalence classes, 5570 disjoint index pairs (out of 5050 index pairs), introduced 101 new quantified variables, introduced 0 case distinctions, treesize of input 524 treesize of output 834 [2022-11-03 02:39:14,938 INFO L390 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 [2022-11-03 02:39:14,943 INFO L390 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 [2022-11-03 02:39:14,951 INFO L390 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 [2022-11-03 02:39:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:19,585 INFO L244 Elim1Store]: Index analysis took 176 ms [2022-11-03 02:39:19,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 105 select indices, 105 select index equivalence classes, 1901 disjoint index pairs (out of 5460 index pairs), introduced 105 new quantified variables, introduced 0 case distinctions, treesize of input 892 treesize of output 316 [2022-11-03 02:39:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 106 select indices, 106 select index equivalence classes, 5570 disjoint index pairs (out of 5565 index pairs), introduced 106 new quantified variables, introduced 0 case distinctions, treesize of input 531 treesize of output 319 [2022-11-03 02:39:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:20,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 107 select indices, 107 select index equivalence classes, 5671 disjoint index pairs (out of 5671 index pairs), introduced 107 new quantified variables, introduced 0 case distinctions, treesize of input 536 treesize of output 322 [2022-11-03 02:39:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:34,701 INFO L244 Elim1Store]: Index analysis took 161 ms [2022-11-03 02:39:34,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 105 select indices, 105 select index equivalence classes, 1901 disjoint index pairs (out of 5460 index pairs), introduced 105 new quantified variables, introduced 0 case distinctions, treesize of input 892 treesize of output 316 [2022-11-03 02:39:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 107 select indices, 107 select index equivalence classes, 5671 disjoint index pairs (out of 5671 index pairs), introduced 107 new quantified variables, introduced 0 case distinctions, treesize of input 536 treesize of output 322 [2022-11-03 02:39:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:39:36,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 106 select indices, 106 select index equivalence classes, 5570 disjoint index pairs (out of 5565 index pairs), introduced 106 new quantified variables, introduced 0 case distinctions, treesize of input 531 treesize of output 319 [2022-11-03 02:40:34,503 INFO L390 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 8 treesize of output 7 [2022-11-03 02:40:34,508 INFO L390 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 [2022-11-03 02:40:45,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:40:45,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:40:47,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:40:47,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:41:40,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:41,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:43,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:41:43,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:41:47,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:47,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:47,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-03 02:41:47,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:47,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:47,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-03 02:41:47,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:47,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:48,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:48,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:48,315 INFO L390 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 [2022-11-03 02:41:48,321 INFO L390 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 14 treesize of output 10 [2022-11-03 02:41:48,330 INFO L390 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 14 treesize of output 10 [2022-11-03 02:41:48,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 114 [2022-11-03 02:41:48,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 112 [2022-11-03 02:41:48,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 112 [2022-11-03 02:41:48,400 INFO L390 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 [2022-11-03 02:41:48,405 INFO L390 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 14 treesize of output 10 [2022-11-03 02:41:48,411 INFO L390 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 14 treesize of output 10 [2022-11-03 02:41:51,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:51,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:51,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-03 02:41:51,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-03 02:41:51,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:51,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:52,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:52,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:52,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:52,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:41:58,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:58,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:58,832 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:41:58,836 INFO L158 Benchmark]: Toolchain (without parser) took 394208.46ms. Allocated memory was 123.7MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 77.6MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.4GB. Max. memory is 16.1GB. [2022-11-03 02:41:58,836 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 123.7MB. Free memory was 101.3MB in the beginning and 101.3MB in the end (delta: 77.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:58,837 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1681.73ms. Allocated memory is still 123.7MB. Free memory was 77.4MB in the beginning and 49.5MB in the end (delta: 27.9MB). Peak memory consumption was 43.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:58,837 INFO L158 Benchmark]: Boogie Procedure Inliner took 208.68ms. Allocated memory was 123.7MB in the beginning and 174.1MB in the end (delta: 50.3MB). Free memory was 49.5MB in the beginning and 124.5MB in the end (delta: -75.0MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-11-03 02:41:58,837 INFO L158 Benchmark]: Boogie Preprocessor took 125.86ms. Allocated memory is still 174.1MB. Free memory was 124.5MB in the beginning and 111.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:41:58,838 INFO L158 Benchmark]: RCFGBuilder took 5721.76ms. Allocated memory was 174.1MB in the beginning and 245.4MB in the end (delta: 71.3MB). Free memory was 111.5MB in the beginning and 142.3MB in the end (delta: -30.8MB). Peak memory consumption was 98.2MB. Max. memory is 16.1GB. [2022-11-03 02:41:58,838 INFO L158 Benchmark]: TraceAbstraction took 386461.12ms. Allocated memory was 245.4MB in the beginning and 7.9GB in the end (delta: 7.7GB). Free memory was 142.3MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.3GB. Max. memory is 16.1GB. [2022-11-03 02:41:58,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 123.7MB. Free memory was 101.3MB in the beginning and 101.3MB in the end (delta: 77.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1681.73ms. Allocated memory is still 123.7MB. Free memory was 77.4MB in the beginning and 49.5MB in the end (delta: 27.9MB). Peak memory consumption was 43.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 208.68ms. Allocated memory was 123.7MB in the beginning and 174.1MB in the end (delta: 50.3MB). Free memory was 49.5MB in the beginning and 124.5MB in the end (delta: -75.0MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 125.86ms. Allocated memory is still 174.1MB. Free memory was 124.5MB in the beginning and 111.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 5721.76ms. Allocated memory was 174.1MB in the beginning and 245.4MB in the end (delta: 71.3MB). Free memory was 111.5MB in the beginning and 142.3MB in the end (delta: -30.8MB). Peak memory consumption was 98.2MB. Max. memory is 16.1GB. * TraceAbstraction took 386461.12ms. Allocated memory was 245.4MB in the beginning and 7.9GB in the end (delta: 7.7GB). Free memory was 142.3MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 4.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:41:58,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI --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 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:42:01,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:42:01,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:42:01,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:42:01,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:42:01,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:42:01,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:42:01,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:42:01,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:42:01,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:42:01,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:42:01,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:42:01,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:42:01,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:42:01,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:42:01,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:42:01,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:42:01,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:42:01,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:42:01,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:42:01,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:42:01,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:42:01,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:42:01,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:42:01,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:42:01,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:42:01,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:42:01,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:42:01,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:42:01,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:42:01,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:42:01,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:42:01,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:42:01,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:42:01,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:42:01,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:42:01,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:42:01,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:42:01,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:42:01,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:42:01,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:42:01,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:42:01,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:42:01,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:42:01,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:42:01,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:42:01,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:42:01,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:42:01,763 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:42:01,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:42:01,763 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:42:01,763 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:42:01,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:42:01,764 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:42:01,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:42:01,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:42:01,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:42:01,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:42:01,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:42:01,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:42:01,767 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:42:01,767 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:42:01,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:42:01,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:42:01,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:42:01,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:42:01,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:42:01,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:42:01,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:01,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:42:01,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:42:01,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:42:01,770 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:42:01,770 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:01,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:42:01,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:42:01,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:42:01,771 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2022-11-03 02:42:02,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:42:02,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:42:02,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:42:02,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:42:02,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:42:02,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:42:02,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/6bbf79b11/0a4b1ccb7109457481872421cd651c81/FLAG265ee1a86 [2022-11-03 02:42:03,066 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:42:03,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:42:03,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/6bbf79b11/0a4b1ccb7109457481872421cd651c81/FLAG265ee1a86 [2022-11-03 02:42:03,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/data/6bbf79b11/0a4b1ccb7109457481872421cd651c81 [2022-11-03 02:42:03,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:42:03,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:42:03,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:03,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:42:03,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:42:03,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:03" (1/1) ... [2022-11-03 02:42:03,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea55297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:03, skipping insertion in model container [2022-11-03 02:42:03,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:03" (1/1) ... [2022-11-03 02:42:03,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:42:03,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:04,314 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2022-11-03 02:42:04,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:04,385 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:42:04,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:04,641 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2022-11-03 02:42:04,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:04,662 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:42:04,940 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_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2022-11-03 02:42:04,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:05,008 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:42:05,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05 WrapperNode [2022-11-03 02:42:05,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:05,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:05,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:42:05,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:42:05,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,195 INFO L138 Inliner]: procedures = 130, calls = 787, calls flagged for inlining = 53, calls inlined = 52, statements flattened = 1849 [2022-11-03 02:42:05,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:05,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:42:05,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:42:05,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:42:05,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,417 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:42:05,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:42:05,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:42:05,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:42:05,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (1/1) ... [2022-11-03 02:42:05,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:05,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:42:05,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:42:05,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:42:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:42:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:42:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:42:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:42:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:42:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-03 02:42:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:42:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:42:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:42:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:42:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:42:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-03 02:42:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-03 02:42:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:42:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:42:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:42:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:42:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:42:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:42:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:42:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:42:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:42:05,549 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:42:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2022-11-03 02:42:05,549 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2022-11-03 02:42:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-03 02:42:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-03 02:42:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-03 02:42:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-03 02:42:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2022-11-03 02:42:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2022-11-03 02:42:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:42:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:42:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:42:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:42:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2022-11-03 02:42:05,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2022-11-03 02:42:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:42:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:42:05,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:42:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:42:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2022-11-03 02:42:05,554 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2022-11-03 02:42:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2022-11-03 02:42:05,554 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2022-11-03 02:42:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:42:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:42:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-11-03 02:42:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-11-03 02:42:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-03 02:42:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:42:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2022-11-03 02:42:05,557 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2022-11-03 02:42:05,558 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 02:42:05,558 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 02:42:05,558 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:42:05,558 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:42:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-03 02:42:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2022-11-03 02:42:05,559 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2022-11-03 02:42:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-03 02:42:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:42:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:42:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:42:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-03 02:42:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:42:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 02:42:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 02:42:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2022-11-03 02:42:05,561 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2022-11-03 02:42:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-03 02:42:05,561 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-03 02:42:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:42:05,562 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:42:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:42:05,562 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:42:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-03 02:42:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2022-11-03 02:42:05,563 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2022-11-03 02:42:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:42:05,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:42:06,188 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:42:06,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:42:06,622 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:42:24,104 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:42:24,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:42:24,118 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:42:24,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:24 BoogieIcfgContainer [2022-11-03 02:42:24,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:42:24,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:42:24,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:42:24,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:42:24,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:42:03" (1/3) ... [2022-11-03 02:42:24,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38148a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:24, skipping insertion in model container [2022-11-03 02:42:24,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:05" (2/3) ... [2022-11-03 02:42:24,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38148a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:24, skipping insertion in model container [2022-11-03 02:42:24,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:24" (3/3) ... [2022-11-03 02:42:24,131 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:42:24,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:42:24,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:42:24,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:42:24,255 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@272dc587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:24,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 446 states have (on average 1.4103139013452914) internal successors, (629), 453 states have internal predecessors, (629), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-11-03 02:42:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:42:24,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:24,298 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:24,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1370803934, now seen corresponding path program 1 times [2022-11-03 02:42:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637373489] [2022-11-03 02:42:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:24,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:24,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:24,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:42:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:42:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 02:42:25,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:25,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637373489] [2022-11-03 02:42:25,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637373489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:25,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:25,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:42:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130249047] [2022-11-03 02:42:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:25,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:42:25,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:42:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:25,478 INFO L87 Difference]: Start difference. First operand has 587 states, 446 states have (on average 1.4103139013452914) internal successors, (629), 453 states have internal predecessors, (629), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:42:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:25,567 INFO L93 Difference]: Finished difference Result 1170 states and 1751 transitions. [2022-11-03 02:42:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:42:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 128 [2022-11-03 02:42:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:25,584 INFO L225 Difference]: With dead ends: 1170 [2022-11-03 02:42:25,585 INFO L226 Difference]: Without dead ends: 571 [2022-11-03 02:42:25,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:25,596 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:25,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:42:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-03 02:42:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2022-11-03 02:42:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 437 states have (on average 1.3981693363844394) internal successors, (611), 438 states have internal predecessors, (611), 108 states have call successors, (108), 25 states have call predecessors, (108), 25 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 02:42:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 827 transitions. [2022-11-03 02:42:25,677 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 827 transitions. Word has length 128 [2022-11-03 02:42:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:25,678 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 827 transitions. [2022-11-03 02:42:25,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:42:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 827 transitions. [2022-11-03 02:42:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:42:25,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:25,684 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:25,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:25,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:25,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 948643174, now seen corresponding path program 1 times [2022-11-03 02:42:25,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213925854] [2022-11-03 02:42:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:25,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:25,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:25,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:42:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:26,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:42:27,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:27,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:27,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213925854] [2022-11-03 02:42:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213925854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:27,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:42:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788698290] [2022-11-03 02:42:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:42:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:42:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:27,557 INFO L87 Difference]: Start difference. First operand 571 states and 827 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:42:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:28,183 INFO L93 Difference]: Finished difference Result 1139 states and 1655 transitions. [2022-11-03 02:42:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:42:28,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 128 [2022-11-03 02:42:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:28,190 INFO L225 Difference]: With dead ends: 1139 [2022-11-03 02:42:28,191 INFO L226 Difference]: Without dead ends: 573 [2022-11-03 02:42:28,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:28,194 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 2 mSDsluCounter, 4085 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4907 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:28,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4907 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:42:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-03 02:42:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2022-11-03 02:42:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 438 states have (on average 1.3972602739726028) internal successors, (612), 440 states have internal predecessors, (612), 108 states have call successors, (108), 25 states have call predecessors, (108), 26 states have return successors, (114), 108 states have call predecessors, (114), 108 states have call successors, (114) [2022-11-03 02:42:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 834 transitions. [2022-11-03 02:42:28,231 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 834 transitions. Word has length 128 [2022-11-03 02:42:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:28,231 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 834 transitions. [2022-11-03 02:42:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:42:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 834 transitions. [2022-11-03 02:42:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:42:28,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:28,236 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:28,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:28,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1579561543, now seen corresponding path program 1 times [2022-11-03 02:42:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185438467] [2022-11-03 02:42:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:28,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:28,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:42:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:42:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 02:42:29,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:29,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185438467] [2022-11-03 02:42:29,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185438467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:29,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:29,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:29,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308596396] [2022-11-03 02:42:29,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:29,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:29,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:29,802 INFO L87 Difference]: Start difference. First operand 573 states and 834 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:30,341 INFO L93 Difference]: Finished difference Result 1155 states and 1669 transitions. [2022-11-03 02:42:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2022-11-03 02:42:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:30,347 INFO L225 Difference]: With dead ends: 1155 [2022-11-03 02:42:30,347 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 02:42:30,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:30,350 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 39 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:30,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3281 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 02:42:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2022-11-03 02:42:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 450 states have (on average 1.3866666666666667) internal successors, (624), 451 states have internal predecessors, (624), 111 states have call successors, (111), 29 states have call predecessors, (111), 29 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-11-03 02:42:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 846 transitions. [2022-11-03 02:42:30,386 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 846 transitions. Word has length 134 [2022-11-03 02:42:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:30,387 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 846 transitions. [2022-11-03 02:42:30,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 846 transitions. [2022-11-03 02:42:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:42:30,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:30,392 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:30,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:30,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:30,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -356464088, now seen corresponding path program 2 times [2022-11-03 02:42:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:30,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374091185] [2022-11-03 02:42:30,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:42:30,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:30,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:30,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:30,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:42:42,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:42:42,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:42:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:42:43,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:43,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:43,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374091185] [2022-11-03 02:42:43,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374091185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:43,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:43,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652490217] [2022-11-03 02:42:43,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:43,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:43,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:43,244 INFO L87 Difference]: Start difference. First operand 591 states and 846 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:43,523 INFO L93 Difference]: Finished difference Result 1149 states and 1658 transitions. [2022-11-03 02:42:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2022-11-03 02:42:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:43,528 INFO L225 Difference]: With dead ends: 1149 [2022-11-03 02:42:43,528 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 02:42:43,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:43,531 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 3 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:43,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2464 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:42:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 02:42:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-11-03 02:42:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 451 states have (on average 1.3858093126385809) internal successors, (625), 452 states have internal predecessors, (625), 111 states have call successors, (111), 29 states have call predecessors, (111), 29 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-11-03 02:42:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 847 transitions. [2022-11-03 02:42:43,559 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 847 transitions. Word has length 140 [2022-11-03 02:42:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:43,560 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 847 transitions. [2022-11-03 02:42:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 847 transitions. [2022-11-03 02:42:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:42:43,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:43,563 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:43,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:43,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2069020180, now seen corresponding path program 1 times [2022-11-03 02:42:43,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:43,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864005737] [2022-11-03 02:42:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:43,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:43,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:43,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:42:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:44,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 02:42:45,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-03 02:42:45,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:45,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864005737] [2022-11-03 02:42:45,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864005737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:45,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593098398] [2022-11-03 02:42:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,989 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:45,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:45,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:42:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:46,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-03 02:42:46,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:46,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593098398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:46,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:42:46,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:42:46,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228069829] [2022-11-03 02:42:46,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:46,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:46,995 INFO L87 Difference]: Start difference. First operand 592 states and 847 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:48,053 INFO L93 Difference]: Finished difference Result 1187 states and 1704 transitions. [2022-11-03 02:42:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 145 [2022-11-03 02:42:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:48,060 INFO L225 Difference]: With dead ends: 1187 [2022-11-03 02:42:48,060 INFO L226 Difference]: Without dead ends: 647 [2022-11-03 02:42:48,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:48,063 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 114 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:48,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1514 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:42:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-03 02:42:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-11-03 02:42:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 498 states have (on average 1.3815261044176708) internal successors, (688), 500 states have internal predecessors, (688), 115 states have call successors, (115), 33 states have call predecessors, (115), 33 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-03 02:42:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 918 transitions. [2022-11-03 02:42:48,094 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 918 transitions. Word has length 145 [2022-11-03 02:42:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:48,095 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 918 transitions. [2022-11-03 02:42:48,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:42:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 918 transitions. [2022-11-03 02:42:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-03 02:42:48,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:48,099 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:48,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:48,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:48,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:48,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash -472609456, now seen corresponding path program 1 times [2022-11-03 02:42:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:48,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102331651] [2022-11-03 02:42:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:48,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:48,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:48,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:42:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:49,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 210 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-03 02:42:49,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-03 02:42:50,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102331651] [2022-11-03 02:42:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102331651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936501931] [2022-11-03 02:42:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:50,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:50,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:50,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:42:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:51,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-11-03 02:42:54,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:54,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [936501931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:54,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:42:54,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-03 02:42:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353238271] [2022-11-03 02:42:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:54,572 INFO L87 Difference]: Start difference. First operand 647 states and 918 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:42:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:54,961 INFO L93 Difference]: Finished difference Result 1242 states and 1786 transitions. [2022-11-03 02:42:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 213 [2022-11-03 02:42:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:54,966 INFO L225 Difference]: With dead ends: 1242 [2022-11-03 02:42:54,966 INFO L226 Difference]: Without dead ends: 647 [2022-11-03 02:42:54,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:54,969 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 705 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:54,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 770 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-03 02:42:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-11-03 02:42:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 498 states have (on average 1.3253012048192772) internal successors, (660), 500 states have internal predecessors, (660), 115 states have call successors, (115), 33 states have call predecessors, (115), 33 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-03 02:42:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 890 transitions. [2022-11-03 02:42:55,017 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 890 transitions. Word has length 213 [2022-11-03 02:42:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:55,019 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 890 transitions. [2022-11-03 02:42:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:42:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 890 transitions. [2022-11-03 02:42:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-03 02:42:55,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:55,024 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:55,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:55,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:55,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:55,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1493677810, now seen corresponding path program 1 times [2022-11-03 02:42:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:55,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640110060] [2022-11-03 02:42:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:55,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:55,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:55,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:42:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 210 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-03 02:42:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-03 02:42:57,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640110060] [2022-11-03 02:42:57,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640110060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622087055] [2022-11-03 02:42:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:57,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:57,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:42:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-11-03 02:42:58,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:58,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1622087055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:58,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:42:58,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:42:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576608820] [2022-11-03 02:42:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:42:58,928 INFO L87 Difference]: Start difference. First operand 647 states and 890 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:42:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:59,659 INFO L93 Difference]: Finished difference Result 1830 states and 2533 transitions. [2022-11-03 02:42:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:42:59,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 213 [2022-11-03 02:42:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:59,666 INFO L225 Difference]: With dead ends: 1830 [2022-11-03 02:42:59,667 INFO L226 Difference]: Without dead ends: 1209 [2022-11-03 02:42:59,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:42:59,670 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 742 mSDsluCounter, 3846 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 5381 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:59,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 5381 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-11-03 02:42:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1153. [2022-11-03 02:42:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 893 states have (on average 1.335946248600224) internal successors, (1193), 894 states have internal predecessors, (1193), 205 states have call successors, (205), 54 states have call predecessors, (205), 54 states have return successors, (205), 204 states have call predecessors, (205), 205 states have call successors, (205) [2022-11-03 02:42:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1603 transitions. [2022-11-03 02:42:59,730 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1603 transitions. Word has length 213 [2022-11-03 02:42:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,730 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1603 transitions. [2022-11-03 02:42:59,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:42:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1603 transitions. [2022-11-03 02:42:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-03 02:42:59,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,735 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:59,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:59,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2102075625, now seen corresponding path program 1 times [2022-11-03 02:43:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:00,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765812828] [2022-11-03 02:43:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:00,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:00,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:00,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:43:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:01,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-03 02:43:01,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-11-03 02:43:02,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765812828] [2022-11-03 02:43:02,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765812828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819254965] [2022-11-03 02:43:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,275 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:02,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:43:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-11-03 02:43:04,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819254965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:04,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:04,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902879416] [2022-11-03 02:43:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:04,164 INFO L87 Difference]: Start difference. First operand 1153 states and 1603 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:43:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:05,549 INFO L93 Difference]: Finished difference Result 2744 states and 3846 transitions. [2022-11-03 02:43:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 233 [2022-11-03 02:43:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:05,559 INFO L225 Difference]: With dead ends: 2744 [2022-11-03 02:43:05,559 INFO L226 Difference]: Without dead ends: 1643 [2022-11-03 02:43:05,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:05,563 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 311 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:05,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1540 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:43:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-11-03 02:43:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1641. [2022-11-03 02:43:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1289 states have (on average 1.3266097750193948) internal successors, (1710), 1291 states have internal predecessors, (1710), 263 states have call successors, (263), 88 states have call predecessors, (263), 88 states have return successors, (263), 261 states have call predecessors, (263), 263 states have call successors, (263) [2022-11-03 02:43:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2236 transitions. [2022-11-03 02:43:05,679 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2236 transitions. Word has length 233 [2022-11-03 02:43:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:05,680 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 2236 transitions. [2022-11-03 02:43:05,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 02:43:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2236 transitions. [2022-11-03 02:43:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 02:43:05,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:05,685 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:05,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:05,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:06,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1298576782, now seen corresponding path program 1 times [2022-11-03 02:43:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:06,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734686965] [2022-11-03 02:43:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:06,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:06,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:06,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:06,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:43:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-03 02:43:07,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-11-03 02:43:08,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734686965] [2022-11-03 02:43:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734686965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [796783274] [2022-11-03 02:43:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:08,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:08,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:08,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:43:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:09,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2022-11-03 02:43:09,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [796783274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:09,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:09,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720514371] [2022-11-03 02:43:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:09,422 INFO L87 Difference]: Start difference. First operand 1641 states and 2236 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 02:43:11,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:11,744 INFO L93 Difference]: Finished difference Result 3234 states and 4426 transitions. [2022-11-03 02:43:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:11,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 243 [2022-11-03 02:43:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:11,754 INFO L225 Difference]: With dead ends: 3234 [2022-11-03 02:43:11,754 INFO L226 Difference]: Without dead ends: 1645 [2022-11-03 02:43:11,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:11,760 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 0 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:11,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1578 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:43:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-11-03 02:43:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1645. [2022-11-03 02:43:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1293 states have (on average 1.325599381283836) internal successors, (1714), 1295 states have internal predecessors, (1714), 263 states have call successors, (263), 88 states have call predecessors, (263), 88 states have return successors, (263), 261 states have call predecessors, (263), 263 states have call successors, (263) [2022-11-03 02:43:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2240 transitions. [2022-11-03 02:43:11,843 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2240 transitions. Word has length 243 [2022-11-03 02:43:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2240 transitions. [2022-11-03 02:43:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 02:43:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2240 transitions. [2022-11-03 02:43:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 02:43:11,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:11,848 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:11,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-03 02:43:12,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 02:43:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:12,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1355835084, now seen corresponding path program 1 times [2022-11-03 02:43:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988718962] [2022-11-03 02:43:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:12,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:12,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:43:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-03 02:43:13,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-11-03 02:43:14,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988718962] [2022-11-03 02:43:14,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988718962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [723411050] [2022-11-03 02:43:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:14,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:14,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:14,619 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:14,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:43:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-03 02:43:19,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:19,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [723411050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:19,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:19,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406679872] [2022-11-03 02:43:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:19,168 INFO L87 Difference]: Start difference. First operand 1645 states and 2240 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:43:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:19,485 INFO L93 Difference]: Finished difference Result 3198 states and 4368 transitions. [2022-11-03 02:43:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:19,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 243 [2022-11-03 02:43:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:19,503 INFO L225 Difference]: With dead ends: 3198 [2022-11-03 02:43:19,504 INFO L226 Difference]: Without dead ends: 3196 [2022-11-03 02:43:19,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:19,507 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 646 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:19,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1711 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:43:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-11-03 02:43:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3192. [2022-11-03 02:43:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 2516 states have (on average 1.3318759936406994) internal successors, (3351), 2522 states have internal predecessors, (3351), 504 states have call successors, (504), 171 states have call predecessors, (504), 171 states have return successors, (504), 498 states have call predecessors, (504), 504 states have call successors, (504) [2022-11-03 02:43:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 4359 transitions. [2022-11-03 02:43:19,762 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 4359 transitions. Word has length 243 [2022-11-03 02:43:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:19,763 INFO L495 AbstractCegarLoop]: Abstraction has 3192 states and 4359 transitions. [2022-11-03 02:43:19,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:43:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 4359 transitions. [2022-11-03 02:43:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-03 02:43:19,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:19,768 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:19,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:20,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:20,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -651182348, now seen corresponding path program 1 times [2022-11-03 02:43:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:20,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142392973] [2022-11-03 02:43:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:20,179 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:20,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:43:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-03 02:43:21,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2022-11-03 02:43:22,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142392973] [2022-11-03 02:43:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142392973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234335857] [2022-11-03 02:43:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:22,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:22,495 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:22,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:43:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:23,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-03 02:43:23,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234335857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:23,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:23,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490665695] [2022-11-03 02:43:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:23,786 INFO L87 Difference]: Start difference. First operand 3192 states and 4359 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:25,393 INFO L93 Difference]: Finished difference Result 7314 states and 10061 transitions. [2022-11-03 02:43:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 252 [2022-11-03 02:43:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:25,422 INFO L225 Difference]: With dead ends: 7314 [2022-11-03 02:43:25,422 INFO L226 Difference]: Without dead ends: 4174 [2022-11-03 02:43:25,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:25,431 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 394 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:25,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1665 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:43:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2022-11-03 02:43:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 4172. [2022-11-03 02:43:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 3312 states have (on average 1.3245772946859904) internal successors, (4387), 3320 states have internal predecessors, (4387), 620 states have call successors, (620), 239 states have call predecessors, (620), 239 states have return successors, (620), 612 states have call predecessors, (620), 620 states have call successors, (620) [2022-11-03 02:43:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 5627 transitions. [2022-11-03 02:43:25,669 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 5627 transitions. Word has length 252 [2022-11-03 02:43:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:25,670 INFO L495 AbstractCegarLoop]: Abstraction has 4172 states and 5627 transitions. [2022-11-03 02:43:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 5627 transitions. [2022-11-03 02:43:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-03 02:43:25,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:25,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:25,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:25,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:26,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:26,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1309386260, now seen corresponding path program 1 times [2022-11-03 02:43:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:26,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122385380] [2022-11-03 02:43:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:26,089 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:26,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:43:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 272 proven. 1 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 02:43:27,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-03 02:43:28,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122385380] [2022-11-03 02:43:28,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122385380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7270225] [2022-11-03 02:43:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:28,607 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:28,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:43:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:29,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-03 02:43:30,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:30,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7270225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:43:30,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270649038] [2022-11-03 02:43:30,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:43:30,013 INFO L87 Difference]: Start difference. First operand 4172 states and 5627 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:43:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:30,986 INFO L93 Difference]: Finished difference Result 10584 states and 14187 transitions. [2022-11-03 02:43:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 273 [2022-11-03 02:43:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:31,039 INFO L225 Difference]: With dead ends: 10584 [2022-11-03 02:43:31,039 INFO L226 Difference]: Without dead ends: 6464 [2022-11-03 02:43:31,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:31,052 INFO L413 NwaCegarLoop]: 1182 mSDtfsCounter, 590 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:31,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 2995 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:43:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2022-11-03 02:43:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 4180. [2022-11-03 02:43:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 3320 states have (on average 1.3237951807228916) internal successors, (4395), 3328 states have internal predecessors, (4395), 620 states have call successors, (620), 239 states have call predecessors, (620), 239 states have return successors, (620), 612 states have call predecessors, (620), 620 states have call successors, (620) [2022-11-03 02:43:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 5635 transitions. [2022-11-03 02:43:31,441 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 5635 transitions. Word has length 273 [2022-11-03 02:43:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:31,442 INFO L495 AbstractCegarLoop]: Abstraction has 4180 states and 5635 transitions. [2022-11-03 02:43:31,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:43:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 5635 transitions. [2022-11-03 02:43:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-11-03 02:43:31,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:31,448 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:31,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:31,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:31,871 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -973657234, now seen corresponding path program 1 times [2022-11-03 02:43:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770674636] [2022-11-03 02:43:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:31,875 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:43:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:32,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 272 proven. 1 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 02:43:33,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-03 02:43:34,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770674636] [2022-11-03 02:43:34,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770674636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771571949] [2022-11-03 02:43:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:34,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:34,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:34,279 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:34,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:43:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:35,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-03 02:43:35,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:35,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771571949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:35,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:35,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646701668] [2022-11-03 02:43:35,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:35,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:35,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:35,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:35,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:35,701 INFO L87 Difference]: Start difference. First operand 4180 states and 5635 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:43:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:37,332 INFO L93 Difference]: Finished difference Result 9326 states and 12637 transitions. [2022-11-03 02:43:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 279 [2022-11-03 02:43:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:37,355 INFO L225 Difference]: With dead ends: 9326 [2022-11-03 02:43:37,356 INFO L226 Difference]: Without dead ends: 5198 [2022-11-03 02:43:37,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 827 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:37,367 INFO L413 NwaCegarLoop]: 1069 mSDtfsCounter, 424 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:37,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1654 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:43:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2022-11-03 02:43:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 5196. [2022-11-03 02:43:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5196 states, 4140 states have (on average 1.317632850241546) internal successors, (5455), 4150 states have internal predecessors, (5455), 736 states have call successors, (736), 319 states have call predecessors, (736), 319 states have return successors, (736), 726 states have call predecessors, (736), 736 states have call successors, (736) [2022-11-03 02:43:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 6927 transitions. [2022-11-03 02:43:37,807 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 6927 transitions. Word has length 279 [2022-11-03 02:43:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:37,808 INFO L495 AbstractCegarLoop]: Abstraction has 5196 states and 6927 transitions. [2022-11-03 02:43:37,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:43:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 6927 transitions. [2022-11-03 02:43:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-03 02:43:37,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:37,815 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:37,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:38,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:38,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1453629428, now seen corresponding path program 1 times [2022-11-03 02:43:38,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:38,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370665303] [2022-11-03 02:43:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:38,232 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:38,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:43:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:39,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-11-03 02:43:39,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-11-03 02:43:40,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370665303] [2022-11-03 02:43:40,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370665303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426563528] [2022-11-03 02:43:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:40,738 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:40,739 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:40,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:43:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-11-03 02:43:42,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:42,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426563528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:42,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:43:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452882463] [2022-11-03 02:43:42,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:42,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:42,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:43:42,270 INFO L87 Difference]: Start difference. First operand 5196 states and 6927 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:43:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:43,560 INFO L93 Difference]: Finished difference Result 13964 states and 18531 transitions. [2022-11-03 02:43:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 322 [2022-11-03 02:43:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:43,592 INFO L225 Difference]: With dead ends: 13964 [2022-11-03 02:43:43,592 INFO L226 Difference]: Without dead ends: 8820 [2022-11-03 02:43:43,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:43,604 INFO L413 NwaCegarLoop]: 1339 mSDtfsCounter, 768 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:43,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 3241 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:43:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8820 states. [2022-11-03 02:43:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8820 to 5204. [2022-11-03 02:43:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 4148 states have (on average 1.31702025072324) internal successors, (5463), 4158 states have internal predecessors, (5463), 736 states have call successors, (736), 319 states have call predecessors, (736), 319 states have return successors, (736), 726 states have call predecessors, (736), 736 states have call successors, (736) [2022-11-03 02:43:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 6935 transitions. [2022-11-03 02:43:44,090 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 6935 transitions. Word has length 322 [2022-11-03 02:43:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:44,091 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 6935 transitions. [2022-11-03 02:43:44,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:43:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 6935 transitions. [2022-11-03 02:43:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-03 02:43:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:44,099 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:44,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:44,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,510 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -669269360, now seen corresponding path program 1 times [2022-11-03 02:43:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534853740] [2022-11-03 02:43:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:44,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:44,513 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:44,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:43:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:45,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:45,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 296 proven. 1 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-03 02:43:46,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-11-03 02:43:47,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534853740] [2022-11-03 02:43:47,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534853740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2022052356] [2022-11-03 02:43:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:47,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:47,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:43:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:48,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:48,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-11-03 02:43:48,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:48,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2022052356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:48,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:48,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:43:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199637335] [2022-11-03 02:43:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:48,573 INFO L87 Difference]: Start difference. First operand 5204 states and 6935 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:43:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:49,081 INFO L93 Difference]: Finished difference Result 10360 states and 13816 transitions. [2022-11-03 02:43:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 375 [2022-11-03 02:43:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:49,099 INFO L225 Difference]: With dead ends: 10360 [2022-11-03 02:43:49,137 INFO L226 Difference]: Without dead ends: 5208 [2022-11-03 02:43:49,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 1115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:49,148 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 0 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:49,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1577 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2022-11-03 02:43:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 5208. [2022-11-03 02:43:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 4152 states have (on average 1.3167148362235068) internal successors, (5467), 4162 states have internal predecessors, (5467), 736 states have call successors, (736), 319 states have call predecessors, (736), 319 states have return successors, (736), 726 states have call predecessors, (736), 736 states have call successors, (736) [2022-11-03 02:43:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 6939 transitions. [2022-11-03 02:43:49,590 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 6939 transitions. Word has length 375 [2022-11-03 02:43:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:49,591 INFO L495 AbstractCegarLoop]: Abstraction has 5208 states and 6939 transitions. [2022-11-03 02:43:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:43:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 6939 transitions. [2022-11-03 02:43:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-03 02:43:49,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:49,599 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:49,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:49,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:43:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:50,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -9737838, now seen corresponding path program 1 times [2022-11-03 02:43:50,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:50,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429985885] [2022-11-03 02:43:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:50,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:50,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:50,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:50,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:43:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 296 proven. 1 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-03 02:43:51,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-11-03 02:43:52,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429985885] [2022-11-03 02:43:52,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429985885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817431253] [2022-11-03 02:43:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:52,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:52,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:52,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 02:43:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-11-03 02:43:54,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:54,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817431253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:54,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:54,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:43:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972922891] [2022-11-03 02:43:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:54,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:43:54,366 INFO L87 Difference]: Start difference. First operand 5208 states and 6939 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:43:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:55,007 INFO L93 Difference]: Finished difference Result 10380 states and 13844 transitions. [2022-11-03 02:43:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 375 [2022-11-03 02:43:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:55,025 INFO L225 Difference]: With dead ends: 10380 [2022-11-03 02:43:55,025 INFO L226 Difference]: Without dead ends: 5224 [2022-11-03 02:43:55,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 1114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:55,070 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 2 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:55,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2360 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:43:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2022-11-03 02:43:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5220. [2022-11-03 02:43:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 4164 states have (on average 1.3158021133525457) internal successors, (5479), 4174 states have internal predecessors, (5479), 736 states have call successors, (736), 319 states have call predecessors, (736), 319 states have return successors, (736), 726 states have call predecessors, (736), 736 states have call successors, (736) [2022-11-03 02:43:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6951 transitions. [2022-11-03 02:43:55,547 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6951 transitions. Word has length 375 [2022-11-03 02:43:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:55,549 INFO L495 AbstractCegarLoop]: Abstraction has 5220 states and 6951 transitions. [2022-11-03 02:43:55,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:43:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6951 transitions. [2022-11-03 02:43:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-03 02:43:55,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:55,560 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:55,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:55,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 02:43:55,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:55,972 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1978961522, now seen corresponding path program 1 times [2022-11-03 02:43:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:55,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524442649] [2022-11-03 02:43:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:55,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:55,975 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:55,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:43:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 296 proven. 1 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-03 02:43:57,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-11-03 02:43:58,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:58,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524442649] [2022-11-03 02:43:58,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524442649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360995403] [2022-11-03 02:43:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:58,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:58,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:58,823 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:44:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-11-03 02:44:01,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:01,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360995403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:01,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:44:01,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 14 [2022-11-03 02:44:01,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494250725] [2022-11-03 02:44:01,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:01,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:44:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:44:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:44:01,726 INFO L87 Difference]: Start difference. First operand 5220 states and 6951 transitions. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:44:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:03,347 INFO L93 Difference]: Finished difference Result 11306 states and 15110 transitions. [2022-11-03 02:44:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:44:03,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 375 [2022-11-03 02:44:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:03,368 INFO L225 Difference]: With dead ends: 11306 [2022-11-03 02:44:03,368 INFO L226 Difference]: Without dead ends: 6138 [2022-11-03 02:44:03,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 1110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:44:03,380 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 158 mSDsluCounter, 5666 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6642 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:03,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 6642 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:44:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2022-11-03 02:44:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 5252. [2022-11-03 02:44:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5252 states, 4188 states have (on average 1.313992359121299) internal successors, (5503), 4198 states have internal predecessors, (5503), 736 states have call successors, (736), 319 states have call predecessors, (736), 327 states have return successors, (756), 734 states have call predecessors, (756), 736 states have call successors, (756) [2022-11-03 02:44:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 6995 transitions. [2022-11-03 02:44:03,843 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 6995 transitions. Word has length 375 [2022-11-03 02:44:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:03,844 INFO L495 AbstractCegarLoop]: Abstraction has 5252 states and 6995 transitions. [2022-11-03 02:44:03,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:44:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 6995 transitions. [2022-11-03 02:44:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-03 02:44:03,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:03,864 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:03,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:04,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:04,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:04,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1486070255, now seen corresponding path program 2 times [2022-11-03 02:44:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:04,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19787651] [2022-11-03 02:44:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:44:04,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:04,284 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:44:16,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:44:16,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:16,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:44:16,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-11-03 02:44:17,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-11-03 02:44:18,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19787651] [2022-11-03 02:44:18,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19787651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163831931] [2022-11-03 02:44:18,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:44:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:18,182 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:44:34,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:44:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:44:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2022-11-03 02:44:36,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:36,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163831931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:36,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:44:36,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 17 [2022-11-03 02:44:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112722232] [2022-11-03 02:44:36,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:44:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:44:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:44:36,977 INFO L87 Difference]: Start difference. First operand 5252 states and 6995 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 8 states have internal predecessors, (163), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-03 02:44:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:39,838 INFO L93 Difference]: Finished difference Result 11942 states and 15988 transitions. [2022-11-03 02:44:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:44:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 8 states have internal predecessors, (163), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 3 states have call successors, (34) Word has length 381 [2022-11-03 02:44:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:39,861 INFO L225 Difference]: With dead ends: 11942 [2022-11-03 02:44:39,862 INFO L226 Difference]: Without dead ends: 6742 [2022-11-03 02:44:39,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:44:39,871 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 621 mSDsluCounter, 8503 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 9559 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:39,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 9559 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:44:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2022-11-03 02:44:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 5296. [2022-11-03 02:44:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 4220 states have (on average 1.311611374407583) internal successors, (5535), 4230 states have internal predecessors, (5535), 736 states have call successors, (736), 319 states have call predecessors, (736), 339 states have return successors, (792), 746 states have call predecessors, (792), 736 states have call successors, (792) [2022-11-03 02:44:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 7063 transitions. [2022-11-03 02:44:40,329 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 7063 transitions. Word has length 381 [2022-11-03 02:44:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:40,330 INFO L495 AbstractCegarLoop]: Abstraction has 5296 states and 7063 transitions. [2022-11-03 02:44:40,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 8 states have internal predecessors, (163), 3 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-03 02:44:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 7063 transitions. [2022-11-03 02:44:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-03 02:44:40,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:40,339 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:40,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:40,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 265586384, now seen corresponding path program 3 times [2022-11-03 02:44:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:40,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779096559] [2022-11-03 02:44:40,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:44:40,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:40,759 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:40,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:45:37,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:45:37,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:45:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 348 proven. 1 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-11-03 02:45:37,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2022-11-03 02:45:38,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779096559] [2022-11-03 02:45:38,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779096559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336650432] [2022-11-03 02:45:38,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:38,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:38,599 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:46:03,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:46:03,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219634967] [2022-11-03 02:46:03,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:46:03,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:03,475 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:03,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 1 [2022-11-03 02:46:03,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:47:48,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:47:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:47:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 348 proven. 1 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-11-03 02:47:48,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2022-11-03 02:47:48,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219634967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:48,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:47:48,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 8 [2022-11-03 02:47:48,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98547058] [2022-11-03 02:47:48,957 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:48,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:47:48,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:48,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:47:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:47:48,960 INFO L87 Difference]: Start difference. First operand 5296 states and 7063 transitions. Second operand has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2022-11-03 02:47:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:50,364 INFO L93 Difference]: Finished difference Result 10568 states and 14105 transitions. [2022-11-03 02:47:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:47:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 387 [2022-11-03 02:47:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:50,382 INFO L225 Difference]: With dead ends: 10568 [2022-11-03 02:47:50,383 INFO L226 Difference]: Without dead ends: 5306 [2022-11-03 02:47:50,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 1538 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:50,393 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 21 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:50,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2352 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:47:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2022-11-03 02:47:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5306. [2022-11-03 02:47:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5306 states, 4229 states have (on average 1.3116576022700401) internal successors, (5547), 4239 states have internal predecessors, (5547), 736 states have call successors, (736), 320 states have call predecessors, (736), 340 states have return successors, (792), 746 states have call predecessors, (792), 736 states have call successors, (792) [2022-11-03 02:47:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 7075 transitions. [2022-11-03 02:47:50,861 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 7075 transitions. Word has length 387 [2022-11-03 02:47:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:50,861 INFO L495 AbstractCegarLoop]: Abstraction has 5306 states and 7075 transitions. [2022-11-03 02:47:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2022-11-03 02:47:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 7075 transitions. [2022-11-03 02:47:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-11-03 02:47:50,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:50,870 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:50,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:51,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:51,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1667384827, now seen corresponding path program 4 times [2022-11-03 02:47:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:51,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078082206] [2022-11-03 02:47:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:47:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:51,286 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:51,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:47:52,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:47:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:47:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 406 proven. 3 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-03 02:47:53,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-03 02:47:54,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078082206] [2022-11-03 02:47:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078082206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653363282] [2022-11-03 02:47:54,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:47:54,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:54,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:54,707 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:54,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:47:57,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:47:57,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:47:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 406 proven. 3 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-03 02:47:57,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-03 02:47:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653363282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:58,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95160078] [2022-11-03 02:47:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:47:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:58,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:58,479 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:47:59,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:47:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 406 proven. 3 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-03 02:48:00,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-03 02:48:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95160078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:01,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:01,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2022-11-03 02:48:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832305628] [2022-11-03 02:48:01,833 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:48:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:48:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:48:01,835 INFO L87 Difference]: Start difference. First operand 5306 states and 7075 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (58), 2 states have call predecessors, (58), 5 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2022-11-03 02:48:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:04,842 INFO L93 Difference]: Finished difference Result 10585 states and 14127 transitions. [2022-11-03 02:48:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:48:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (58), 2 states have call predecessors, (58), 5 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 400 [2022-11-03 02:48:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:04,860 INFO L225 Difference]: With dead ends: 10585 [2022-11-03 02:48:04,860 INFO L226 Difference]: Without dead ends: 5310 [2022-11-03 02:48:04,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2399 GetRequests, 2382 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:48:04,870 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 25 mSDsluCounter, 5459 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:04,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6244 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:48:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-11-03 02:48:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5310. [2022-11-03 02:48:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 4233 states have (on average 1.3111268603827073) internal successors, (5550), 4243 states have internal predecessors, (5550), 736 states have call successors, (736), 320 states have call predecessors, (736), 340 states have return successors, (792), 746 states have call predecessors, (792), 736 states have call successors, (792) [2022-11-03 02:48:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 7078 transitions. [2022-11-03 02:48:05,370 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 7078 transitions. Word has length 400 [2022-11-03 02:48:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:05,371 INFO L495 AbstractCegarLoop]: Abstraction has 5310 states and 7078 transitions. [2022-11-03 02:48:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 2 states have call successors, (58), 2 states have call predecessors, (58), 5 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2022-11-03 02:48:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 7078 transitions. [2022-11-03 02:48:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-03 02:48:05,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:05,380 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 13, 13, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:05,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:05,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:05,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:06,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:06,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash 470096773, now seen corresponding path program 5 times [2022-11-03 02:48:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:06,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140213188] [2022-11-03 02:48:06,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:48:06,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:06,007 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:06,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:48:07,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-03 02:48:07,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:48:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 460 proven. 10 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-11-03 02:48:08,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 112 proven. 10 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-03 02:48:10,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140213188] [2022-11-03 02:48:10,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140213188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681642024] [2022-11-03 02:48:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:48:10,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:11,000 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:11,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:48:12,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:48:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944474394] [2022-11-03 02:48:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:48:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:12,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:12,237 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:12,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:48:12,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_435ca1a1-a9de-4eff-a6e9-71d8dc9bb3f9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 1