./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/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_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 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-4e7fbc6 [2022-11-23 15:30:38,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:30:38,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:30:39,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:30:39,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:30:39,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:30:39,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:30:39,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:30:39,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:30:39,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:30:39,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:30:39,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:30:39,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:30:39,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:30:39,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:30:39,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:30:39,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:30:39,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:30:39,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:30:39,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:30:39,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:30:39,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:30:39,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:30:39,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:30:39,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:30:39,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:30:39,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:30:39,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:30:39,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:30:39,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:30:39,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:30:39,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:30:39,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:30:39,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:30:39,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:30:39,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:30:39,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:30:39,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:30:39,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:30:39,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:30:39,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:30:39,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:30:39,133 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:30:39,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:30:39,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:30:39,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:30:39,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:30:39,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:30:39,135 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:30:39,135 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:30:39,135 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:30:39,136 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:30:39,137 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:30:39,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:30:39,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:30:39,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:30:39,137 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:30:39,138 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:30:39,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:30:39,138 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:30:39,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:30:39,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:30:39,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:30:39,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:30:39,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:30:39,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:30:39,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:30:39,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:30:39,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:30:39,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:30:39,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:30:39,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:30:39,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:30:39,142 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:30:39,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:30:39,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:30:39,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:30:39,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:30:39,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:30:39,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:30:39,143 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_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2022-11-23 15:30:39,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:30:39,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:30:39,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:30:39,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:30:39,494 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:30:39,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/../../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 [2022-11-23 15:30:42,628 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:30:43,198 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:30:43,199 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/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 [2022-11-23 15:30:43,242 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/data/9af096c98/91aa73b2983f47bfbf5e81cba7b57b52/FLAG63eb7c17a [2022-11-23 15:30:43,260 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/data/9af096c98/91aa73b2983f47bfbf5e81cba7b57b52 [2022-11-23 15:30:43,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:30:43,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:30:43,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:30:43,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:30:43,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:30:43,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:43" (1/1) ... [2022-11-23 15:30:43,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dac6e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:43, skipping insertion in model container [2022-11-23 15:30:43,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:43" (1/1) ... [2022-11-23 15:30:43,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:30:43,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:30:44,286 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/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] [2022-11-23 15:30:44,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:30:44,357 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:30:44,780 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/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] [2022-11-23 15:30:44,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:30:44,873 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:30:44,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44 WrapperNode [2022-11-23 15:30:44,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:30:44,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:30:44,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:30:44,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:30:44,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:44,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,109 INFO L138 Inliner]: procedures = 115, calls = 787, calls flagged for inlining = 53, calls inlined = 52, statements flattened = 1924 [2022-11-23 15:30:45,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:30:45,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:30:45,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:30:45,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:30:45,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,286 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:30:45,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:30:45,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:30:45,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:30:45,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (1/1) ... [2022-11-23 15:30:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:30:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:45,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:30:45,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:30:45,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:30:45,404 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-23 15:30:45,405 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-23 15:30:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:30:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:30:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:30:45,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:30:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:30:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:30:45,406 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:30:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-23 15:30:45,406 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-23 15:30:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:30:45,406 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:30:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 15:30:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 15:30:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:30:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:30:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 15:30:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 15:30:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:30:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:30:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2022-11-23 15:30:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2022-11-23 15:30:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:30:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2022-11-23 15:30:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2022-11-23 15:30:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 15:30:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 15:30:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:30:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:30:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2022-11-23 15:30:45,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2022-11-23 15:30:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:30:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 15:30:45,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 15:30:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:30:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2022-11-23 15:30:45,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2022-11-23 15:30:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2022-11-23 15:30:45,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2022-11-23 15:30:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:30:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:30:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:30:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2022-11-23 15:30:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2022-11-23 15:30:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-23 15:30:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-23 15:30:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 15:30:45,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 15:30:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2022-11-23 15:30:45,414 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2022-11-23 15:30:45,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:30:45,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:30:45,415 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2022-11-23 15:30:45,415 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2022-11-23 15:30:45,416 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-23 15:30:45,416 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-23 15:30:45,416 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 15:30:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 15:30:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:30:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:30:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:30:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2022-11-23 15:30:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2022-11-23 15:30:45,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:30:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:30:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:30:45,987 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:30:45,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:30:46,433 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:30:50,429 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:30:51,075 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:30:51,076 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:30:51,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:51 BoogieIcfgContainer [2022-11-23 15:30:51,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:30:51,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:30:51,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:30:51,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:30:51,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:43" (1/3) ... [2022-11-23 15:30:51,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585edd9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:51, skipping insertion in model container [2022-11-23 15:30:51,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:44" (2/3) ... [2022-11-23 15:30:51,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585edd9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:51, skipping insertion in model container [2022-11-23 15:30:51,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:51" (3/3) ... [2022-11-23 15:30:51,094 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 [2022-11-23 15:30:51,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:30:51,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:30:51,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:30:51,204 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;@4cf50e99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:30:51,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:30:51,212 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) [2022-11-23 15:30:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:30:51,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:51,243 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] [2022-11-23 15:30:51,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2014251183, now seen corresponding path program 1 times [2022-11-23 15:30:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:51,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82161272] [2022-11-23 15:30:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-23 15:30:52,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:52,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82161272] [2022-11-23 15:30:52,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82161272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:52,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:52,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:30:52,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207037918] [2022-11-23 15:30:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:52,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:52,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:52,134 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) [2022-11-23 15:30:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:53,584 INFO L93 Difference]: Finished difference Result 839 states and 1224 transitions. [2022-11-23 15:30:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:30:53,588 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 [2022-11-23 15:30:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:53,608 INFO L225 Difference]: With dead ends: 839 [2022-11-23 15:30:53,608 INFO L226 Difference]: Without dead ends: 443 [2022-11-23 15:30:53,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:53,627 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 109 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:53,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 893 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:30:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-23 15:30:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-23 15:30:53,731 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) [2022-11-23 15:30:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 633 transitions. [2022-11-23 15:30:53,740 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 633 transitions. Word has length 99 [2022-11-23 15:30:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:53,741 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 633 transitions. [2022-11-23 15:30:53,742 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) [2022-11-23 15:30:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 633 transitions. [2022-11-23 15:30:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 15:30:53,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:53,753 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] [2022-11-23 15:30:53,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:30:53,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1264575074, now seen corresponding path program 1 times [2022-11-23 15:30:53,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:53,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881920460] [2022-11-23 15:30:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-23 15:30:54,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:54,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881920460] [2022-11-23 15:30:54,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881920460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:54,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:54,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:30:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651321878] [2022-11-23 15:30:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:54,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:54,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:54,282 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) [2022-11-23 15:30:57,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:57,362 INFO L93 Difference]: Finished difference Result 1040 states and 1490 transitions. [2022-11-23 15:30:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:30:57,363 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 [2022-11-23 15:30:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:57,369 INFO L225 Difference]: With dead ends: 1040 [2022-11-23 15:30:57,369 INFO L226 Difference]: Without dead ends: 631 [2022-11-23 15:30:57,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:57,378 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 245 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:57,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 936 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 15:30:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-23 15:30:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2022-11-23 15:30:57,431 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) [2022-11-23 15:30:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 869 transitions. [2022-11-23 15:30:57,436 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 869 transitions. Word has length 153 [2022-11-23 15:30:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:57,440 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 869 transitions. [2022-11-23 15:30:57,440 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) [2022-11-23 15:30:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 869 transitions. [2022-11-23 15:30:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-23 15:30:57,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:57,448 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] [2022-11-23 15:30:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:30:57,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1266277364, now seen corresponding path program 1 times [2022-11-23 15:30:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859588800] [2022-11-23 15:30:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-23 15:30:58,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859588800] [2022-11-23 15:30:58,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859588800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:58,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:58,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:30:58,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919835522] [2022-11-23 15:30:58,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:58,102 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) [2022-11-23 15:31:00,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:02,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:02,166 INFO L93 Difference]: Finished difference Result 1214 states and 1677 transitions. [2022-11-23 15:31:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:02,167 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 [2022-11-23 15:31:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:02,174 INFO L225 Difference]: With dead ends: 1214 [2022-11-23 15:31:02,174 INFO L226 Difference]: Without dead ends: 1212 [2022-11-23 15:31:02,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:02,176 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 485 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:02,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1081 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 15:31:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-11-23 15:31:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1211. [2022-11-23 15:31:02,255 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) [2022-11-23 15:31:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1673 transitions. [2022-11-23 15:31:02,262 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1673 transitions. Word has length 164 [2022-11-23 15:31:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:02,263 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1673 transitions. [2022-11-23 15:31:02,263 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) [2022-11-23 15:31:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1673 transitions. [2022-11-23 15:31:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-23 15:31:02,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:02,267 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] [2022-11-23 15:31:02,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:31:02,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1056538517, now seen corresponding path program 1 times [2022-11-23 15:31:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33208557] [2022-11-23 15:31:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-23 15:31:02,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33208557] [2022-11-23 15:31:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33208557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909811796] [2022-11-23 15:31:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:02,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:02,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:31:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:31:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:31:03,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-23 15:31:04,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909811796] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:04,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:31:04,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2022-11-23 15:31:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543769046] [2022-11-23 15:31:04,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:04,032 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) [2022-11-23 15:31:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:06,118 INFO L93 Difference]: Finished difference Result 2772 states and 3840 transitions. [2022-11-23 15:31:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:06,118 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 [2022-11-23 15:31:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:06,127 INFO L225 Difference]: With dead ends: 2772 [2022-11-23 15:31:06,128 INFO L226 Difference]: Without dead ends: 1595 [2022-11-23 15:31:06,131 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 [2022-11-23 15:31:06,132 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 411 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:06,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 716 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 15:31:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-11-23 15:31:06,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2022-11-23 15:31:06,252 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) [2022-11-23 15:31:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2192 transitions. [2022-11-23 15:31:06,260 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2192 transitions. Word has length 170 [2022-11-23 15:31:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:06,261 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2192 transitions. [2022-11-23 15:31:06,262 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) [2022-11-23 15:31:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2192 transitions. [2022-11-23 15:31:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-23 15:31:06,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:06,267 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] [2022-11-23 15:31:06,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:06,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1321913390, now seen corresponding path program 1 times [2022-11-23 15:31:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:06,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247214028] [2022-11-23 15:31:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-23 15:31:06,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247214028] [2022-11-23 15:31:06,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247214028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678564162] [2022-11-23 15:31:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:06,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:06,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:31:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:31:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 158 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-23 15:31:07,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-23 15:31:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678564162] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:08,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:31:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2022-11-23 15:31:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655409136] [2022-11-23 15:31:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:08,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:08,131 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) [2022-11-23 15:31:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:09,716 INFO L93 Difference]: Finished difference Result 3664 states and 5076 transitions. [2022-11-23 15:31:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:09,716 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 [2022-11-23 15:31:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:09,726 INFO L225 Difference]: With dead ends: 3664 [2022-11-23 15:31:09,726 INFO L226 Difference]: Without dead ends: 2105 [2022-11-23 15:31:09,730 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 [2022-11-23 15:31:09,731 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 415 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:09,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 726 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:31:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-11-23 15:31:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2103. [2022-11-23 15:31:09,854 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) [2022-11-23 15:31:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2899 transitions. [2022-11-23 15:31:09,863 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2899 transitions. Word has length 206 [2022-11-23 15:31:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:09,864 INFO L495 AbstractCegarLoop]: Abstraction has 2103 states and 2899 transitions. [2022-11-23 15:31:09,864 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) [2022-11-23 15:31:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2899 transitions. [2022-11-23 15:31:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-23 15:31:09,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:09,870 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] [2022-11-23 15:31:09,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:10,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:10,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash 758373281, now seen corresponding path program 1 times [2022-11-23 15:31:10,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:10,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026674312] [2022-11-23 15:31:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:10,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-23 15:31:10,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026674312] [2022-11-23 15:31:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026674312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816544608] [2022-11-23 15:31:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:10,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:10,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:31:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:11,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:31:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-23 15:31:11,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:31:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816544608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:31:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-23 15:31:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950329972] [2022-11-23 15:31:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:31:11,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:31:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:11,752 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) [2022-11-23 15:31:17,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:19,470 INFO L93 Difference]: Finished difference Result 6237 states and 8581 transitions. [2022-11-23 15:31:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:31:19,471 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 [2022-11-23 15:31:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:19,489 INFO L225 Difference]: With dead ends: 6237 [2022-11-23 15:31:19,489 INFO L226 Difference]: Without dead ends: 4036 [2022-11-23 15:31:19,495 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 [2022-11-23 15:31:19,496 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 520 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 3239 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:19,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 3239 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 15:31:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2022-11-23 15:31:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3943. [2022-11-23 15:31:19,738 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) [2022-11-23 15:31:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5446 transitions. [2022-11-23 15:31:19,761 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5446 transitions. Word has length 224 [2022-11-23 15:31:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:19,762 INFO L495 AbstractCegarLoop]: Abstraction has 3943 states and 5446 transitions. [2022-11-23 15:31:19,762 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) [2022-11-23 15:31:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5446 transitions. [2022-11-23 15:31:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-23 15:31:19,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:19,769 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] [2022-11-23 15:31:19,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:31:19,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1326003931, now seen corresponding path program 1 times [2022-11-23 15:31:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203629418] [2022-11-23 15:31:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-11-23 15:31:20,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203629418] [2022-11-23 15:31:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203629418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:20,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587436617] [2022-11-23 15:31:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:20,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:20,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:20,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:31:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:31:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 219 proven. 18 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 15:31:21,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-11-23 15:31:22,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587436617] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:22,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:31:22,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-23 15:31:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367716622] [2022-11-23 15:31:22,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:22,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:31:22,275 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) [2022-11-23 15:31:25,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:26,464 INFO L93 Difference]: Finished difference Result 8941 states and 12467 transitions. [2022-11-23 15:31:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:26,464 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 [2022-11-23 15:31:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:26,486 INFO L225 Difference]: With dead ends: 8941 [2022-11-23 15:31:26,486 INFO L226 Difference]: Without dead ends: 5032 [2022-11-23 15:31:26,496 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 [2022-11-23 15:31:26,497 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 523 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:26,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1084 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 15:31:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2022-11-23 15:31:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 4141. [2022-11-23 15:31:26,789 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) [2022-11-23 15:31:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4141 states to 4141 states and 5754 transitions. [2022-11-23 15:31:26,805 INFO L78 Accepts]: Start accepts. Automaton has 4141 states and 5754 transitions. Word has length 236 [2022-11-23 15:31:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:26,806 INFO L495 AbstractCegarLoop]: Abstraction has 4141 states and 5754 transitions. [2022-11-23 15:31:26,806 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) [2022-11-23 15:31:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4141 states and 5754 transitions. [2022-11-23 15:31:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-23 15:31:26,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:26,813 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] [2022-11-23 15:31:26,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:27,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 38375382, now seen corresponding path program 1 times [2022-11-23 15:31:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121347071] [2022-11-23 15:31:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:27,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-11-23 15:31:28,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121347071] [2022-11-23 15:31:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121347071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094163658] [2022-11-23 15:31:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:28,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:28,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:28,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:28,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:31:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:31:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-23 15:31:28,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:31:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094163658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:28,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:31:28,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-23 15:31:28,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503513342] [2022-11-23 15:31:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:31:28,915 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) [2022-11-23 15:31:31,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:32,303 INFO L93 Difference]: Finished difference Result 9124 states and 12879 transitions. [2022-11-23 15:31:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:32,304 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 [2022-11-23 15:31:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:32,328 INFO L225 Difference]: With dead ends: 9124 [2022-11-23 15:31:32,328 INFO L226 Difference]: Without dead ends: 5017 [2022-11-23 15:31:32,339 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 [2022-11-23 15:31:32,339 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 379 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1179 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 15:31:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2022-11-23 15:31:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 4605. [2022-11-23 15:31:32,686 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) [2022-11-23 15:31:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 6390 transitions. [2022-11-23 15:31:32,701 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 6390 transitions. Word has length 238 [2022-11-23 15:31:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:32,701 INFO L495 AbstractCegarLoop]: Abstraction has 4605 states and 6390 transitions. [2022-11-23 15:31:32,703 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) [2022-11-23 15:31:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 6390 transitions. [2022-11-23 15:31:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-23 15:31:32,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:32,730 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] [2022-11-23 15:31:32,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:32,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1321442218, now seen corresponding path program 1 times [2022-11-23 15:31:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795114113] [2022-11-23 15:31:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-11-23 15:31:33,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795114113] [2022-11-23 15:31:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795114113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:33,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792567032] [2022-11-23 15:31:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:33,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:33,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5da9b24-fef3-41ea-8400-379c7313968d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:31:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 15:31:34,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-23 15:31:35,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-23 15:31:35,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792567032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:31:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610137929] [2022-11-23 15:31:35,465 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2022-11-23 15:31:35,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:31:35,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:31:35,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:31:35,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:31:53,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:53,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:53,922 INFO L217 Elim1Store]: Index analysis took 685 ms [2022-11-23 15:32:46,467 WARN L233 SmtUtils]: Spent 52.49s on a formula simplification. DAG size of input: 2253 DAG size of output: 1019 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 15:32:46,474 INFO L321 Elim1Store]: treesize reduction 8160, result has 20.7 percent of original size [2022-11-23 15:32:46,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 101 select indices, 101 select index equivalence classes, 5060 disjoint index pairs (out of 5050 index pairs), introduced 101 new quantified variables, introduced 104 case distinctions, treesize of input 524 treesize of output 2438 [2022-11-23 15:32:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:51,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:51,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:51,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:53,698 INFO L217 Elim1Store]: Index analysis took 4710 ms [2022-11-23 15:34:36,952 WARN L233 SmtUtils]: Spent 1.72m on a formula simplification. DAG size of input: 3175 DAG size of output: 1416 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 15:34:36,956 INFO L321 Elim1Store]: treesize reduction 11844, result has 17.5 percent of original size [2022-11-23 15:34:36,958 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:34:52,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:34:52,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:34:52,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 15:34:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:57,208 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:34:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:58,370 INFO L217 Elim1Store]: Index analysis took 169 ms [2022-11-23 15:34:58,384 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:34:59,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:59,226 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:35:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:12,779 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:35:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:13,699 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:35:14,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:15,076 INFO L217 Elim1Store]: Index analysis took 126 ms [2022-11-23 15:35:15,089 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:35:24,780 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:35:24,912 INFO L350 Elim1Store]: Elim1 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