./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:07:47,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:47,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:47,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:47,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:47,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:47,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:47,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:47,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:47,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:47,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:47,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:47,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:47,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:47,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:47,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:47,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:47,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:47,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:47,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:47,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:47,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:47,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:47,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:47,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:47,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:47,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:47,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:47,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:47,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:47,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:47,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:47,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:47,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:47,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:47,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:47,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:47,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:47,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:47,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:47,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:47,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:07:47,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:47,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:47,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:47,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:47,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:47,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:47,993 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:47,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:47,993 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:47,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:47,994 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:47,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:47,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:47,994 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:47,994 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:47,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:47,995 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:47,995 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:47,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:47,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:47,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:47,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:47,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:47,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:47,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:47,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:47,998 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:47,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:47,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:47,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:47,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:47,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:47,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:47,999 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_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2022-11-03 02:07:48,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:48,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:48,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:48,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:48,285 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:48,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:07:48,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/data/38b697133/f253f8a3c12d419498e9a5408ef1beb9/FLAG70c79ac6b [2022-11-03 02:07:49,176 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:49,177 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:07:49,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/data/38b697133/f253f8a3c12d419498e9a5408ef1beb9/FLAG70c79ac6b [2022-11-03 02:07:49,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/data/38b697133/f253f8a3c12d419498e9a5408ef1beb9 [2022-11-03 02:07:49,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:49,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:49,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:49,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:49,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:49,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:49" (1/1) ... [2022-11-03 02:07:49,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75dbab72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:49, skipping insertion in model container [2022-11-03 02:07:49,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:49" (1/1) ... [2022-11-03 02:07:49,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:49,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:50,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2022-11-03 02:07:50,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:50,610 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:50,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2022-11-03 02:07:50,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:50,999 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:50,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50 WrapperNode [2022-11-03 02:07:50,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:51,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:51,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:51,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:51,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,272 INFO L138 Inliner]: procedures = 106, calls = 3465, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 4255 [2022-11-03 02:07:51,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:51,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:51,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:51,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:51,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:51,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:51,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:51,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:51,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (1/1) ... [2022-11-03 02:07:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:51,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:51,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:51,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2022-11-03 02:07:51,692 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2022-11-03 02:07:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2022-11-03 02:07:51,692 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2022-11-03 02:07:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:07:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-03 02:07:51,692 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-03 02:07:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2022-11-03 02:07:51,693 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2022-11-03 02:07:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:07:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:07:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2022-11-03 02:07:51,694 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2022-11-03 02:07:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:07:51,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:07:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:07:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:07:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:07:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2022-11-03 02:07:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2022-11-03 02:07:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:07:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:07:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:07:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:07:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2022-11-03 02:07:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2022-11-03 02:07:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-03 02:07:51,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-03 02:07:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2022-11-03 02:07:51,697 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2022-11-03 02:07:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:07:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:07:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2022-11-03 02:07:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2022-11-03 02:07:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2022-11-03 02:07:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2022-11-03 02:07:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:07:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2022-11-03 02:07:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2022-11-03 02:07:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2022-11-03 02:07:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2022-11-03 02:07:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:07:51,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:07:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:07:51,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:07:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:07:51,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:07:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:07:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2022-11-03 02:07:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2022-11-03 02:07:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:07:51,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:07:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2022-11-03 02:07:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2022-11-03 02:07:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2022-11-03 02:07:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2022-11-03 02:07:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 02:07:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 02:07:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:07:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:07:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:07:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2022-11-03 02:07:51,706 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2022-11-03 02:07:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2022-11-03 02:07:51,706 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2022-11-03 02:07:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2022-11-03 02:07:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2022-11-03 02:07:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2022-11-03 02:07:51,707 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2022-11-03 02:07:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:07:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:07:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-03 02:07:51,708 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-03 02:07:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2022-11-03 02:07:51,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2022-11-03 02:07:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2022-11-03 02:07:51,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2022-11-03 02:07:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-03 02:07:51,709 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-03 02:07:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-03 02:07:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-03 02:07:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2022-11-03 02:07:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2022-11-03 02:07:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:07:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2022-11-03 02:07:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2022-11-03 02:07:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-03 02:07:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-03 02:07:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:07:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:51,714 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2022-11-03 02:07:51,714 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2022-11-03 02:07:52,261 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:52,264 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:53,028 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:07:59,114 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:59,860 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:59,860 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:07:59,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:59 BoogieIcfgContainer [2022-11-03 02:07:59,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:59,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:59,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:59,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:59,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:49" (1/3) ... [2022-11-03 02:07:59,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3131b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:59, skipping insertion in model container [2022-11-03 02:07:59,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:50" (2/3) ... [2022-11-03 02:07:59,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3131b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:59, skipping insertion in model container [2022-11-03 02:07:59,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:59" (3/3) ... [2022-11-03 02:07:59,881 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:07:59,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:59,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:59,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:59,995 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;@502d4d77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:59,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:08:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) [2022-11-03 02:08:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-03 02:08:00,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:00,032 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:00,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391153, now seen corresponding path program 1 times [2022-11-03 02:08:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085119433] [2022-11-03 02:08:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-03 02:08:02,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:02,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085119433] [2022-11-03 02:08:02,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085119433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:02,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:02,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742714341] [2022-11-03 02:08:02,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:02,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:02,108 INFO L87 Difference]: Start difference. First operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:03,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:04,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:06,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:08,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:08,829 INFO L93 Difference]: Finished difference Result 1352 states and 2027 transitions. [2022-11-03 02:08:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 262 [2022-11-03 02:08:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:08,862 INFO L225 Difference]: With dead ends: 1352 [2022-11-03 02:08:08,862 INFO L226 Difference]: Without dead ends: 757 [2022-11-03 02:08:08,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:08,876 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 317 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:08,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1621 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 02:08:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-03 02:08:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2022-11-03 02:08:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 466 states have (on average 1.3690987124463518) internal successors, (638), 484 states have internal predecessors, (638), 231 states have call successors, (231), 47 states have call predecessors, (231), 47 states have return successors, (231), 225 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-03 02:08:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1100 transitions. [2022-11-03 02:08:09,081 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1100 transitions. Word has length 262 [2022-11-03 02:08:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:09,082 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1100 transitions. [2022-11-03 02:08:09,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1100 transitions. [2022-11-03 02:08:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-03 02:08:09,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:09,089 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:08:09,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -426608264, now seen corresponding path program 1 times [2022-11-03 02:08:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:09,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602455714] [2022-11-03 02:08:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-03 02:08:10,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:10,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602455714] [2022-11-03 02:08:10,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602455714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:10,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:10,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919147398] [2022-11-03 02:08:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:10,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:10,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:10,740 INFO L87 Difference]: Start difference. First operand 745 states and 1100 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-03 02:08:12,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:14,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:15,665 INFO L93 Difference]: Finished difference Result 2022 states and 2991 transitions. [2022-11-03 02:08:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:15,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 273 [2022-11-03 02:08:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:15,679 INFO L225 Difference]: With dead ends: 2022 [2022-11-03 02:08:15,679 INFO L226 Difference]: Without dead ends: 1375 [2022-11-03 02:08:15,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:15,687 INFO L413 NwaCegarLoop]: 1075 mSDtfsCounter, 833 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:15,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1805 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:08:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-03 02:08:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1373. [2022-11-03 02:08:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.386651323360184) internal successors, (1205), 905 states have internal predecessors, (1205), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2022-11-03 02:08:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2029 transitions. [2022-11-03 02:08:15,830 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2029 transitions. Word has length 273 [2022-11-03 02:08:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:15,833 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2029 transitions. [2022-11-03 02:08:15,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-03 02:08:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2029 transitions. [2022-11-03 02:08:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-03 02:08:15,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:15,840 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:15,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:08:15,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1520780228, now seen corresponding path program 1 times [2022-11-03 02:08:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526072712] [2022-11-03 02:08:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:15,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-03 02:08:17,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526072712] [2022-11-03 02:08:17,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526072712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:17,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:17,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:17,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297032216] [2022-11-03 02:08:17,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:17,431 INFO L87 Difference]: Start difference. First operand 1373 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:19,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:21,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:22,434 INFO L93 Difference]: Finished difference Result 2652 states and 3921 transitions. [2022-11-03 02:08:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 275 [2022-11-03 02:08:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:22,446 INFO L225 Difference]: With dead ends: 2652 [2022-11-03 02:08:22,446 INFO L226 Difference]: Without dead ends: 1373 [2022-11-03 02:08:22,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:22,456 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 1 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:22,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2603 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:08:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-11-03 02:08:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1373. [2022-11-03 02:08:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.384349827387802) internal successors, (1203), 905 states have internal predecessors, (1203), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2022-11-03 02:08:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2027 transitions. [2022-11-03 02:08:22,557 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2027 transitions. Word has length 275 [2022-11-03 02:08:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:22,558 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2027 transitions. [2022-11-03 02:08:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2027 transitions. [2022-11-03 02:08:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 02:08:22,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:22,564 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:22,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:08:22,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash 56011632, now seen corresponding path program 1 times [2022-11-03 02:08:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559904902] [2022-11-03 02:08:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-03 02:08:24,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:24,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559904902] [2022-11-03 02:08:24,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559904902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:24,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:24,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711622696] [2022-11-03 02:08:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:24,054 INFO L87 Difference]: Start difference. First operand 1373 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:26,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:28,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:29,138 INFO L93 Difference]: Finished difference Result 2652 states and 3917 transitions. [2022-11-03 02:08:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 278 [2022-11-03 02:08:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:29,151 INFO L225 Difference]: With dead ends: 2652 [2022-11-03 02:08:29,153 INFO L226 Difference]: Without dead ends: 1361 [2022-11-03 02:08:29,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:29,164 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 1 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:29,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2594 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:08:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-11-03 02:08:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1361. [2022-11-03 02:08:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 865 states have (on average 1.3676300578034681) internal successors, (1183), 897 states have internal predecessors, (1183), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-03 02:08:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1995 transitions. [2022-11-03 02:08:29,237 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1995 transitions. Word has length 278 [2022-11-03 02:08:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:29,238 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1995 transitions. [2022-11-03 02:08:29,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-03 02:08:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1995 transitions. [2022-11-03 02:08:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-11-03 02:08:29,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:29,246 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:08:29,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1633255471, now seen corresponding path program 1 times [2022-11-03 02:08:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:29,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872600777] [2022-11-03 02:08:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2022-11-03 02:08:30,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872600777] [2022-11-03 02:08:30,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872600777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012201113] [2022-11-03 02:08:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:30,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:30,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:30,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:30,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:08:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 9935 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-11-03 02:08:32,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:32,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012201113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:32,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:32,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-03 02:08:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817207177] [2022-11-03 02:08:32,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:32,955 INFO L87 Difference]: Start difference. First operand 1361 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 02:08:35,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:37,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:37,718 INFO L93 Difference]: Finished difference Result 2648 states and 4067 transitions. [2022-11-03 02:08:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 376 [2022-11-03 02:08:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:37,737 INFO L225 Difference]: With dead ends: 2648 [2022-11-03 02:08:37,737 INFO L226 Difference]: Without dead ends: 1385 [2022-11-03 02:08:37,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:37,750 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 2 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:37,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1707 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:08:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-03 02:08:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1369. [2022-11-03 02:08:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 873 states have (on average 1.3642611683848798) internal successors, (1191), 905 states have internal predecessors, (1191), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-03 02:08:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2003 transitions. [2022-11-03 02:08:37,828 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2003 transitions. Word has length 376 [2022-11-03 02:08:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:37,830 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2003 transitions. [2022-11-03 02:08:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 02:08:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2003 transitions. [2022-11-03 02:08:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:08:37,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:37,838 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:37,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:38,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:38,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1489186375, now seen corresponding path program 1 times [2022-11-03 02:08:38,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:38,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30575397] [2022-11-03 02:08:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2467 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2022-11-03 02:08:39,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30575397] [2022-11-03 02:08:39,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30575397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:39,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:39,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824097294] [2022-11-03 02:08:39,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:39,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:39,434 INFO L87 Difference]: Start difference. First operand 1369 states and 2003 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 02:08:40,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:42,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:44,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:45,241 INFO L93 Difference]: Finished difference Result 2652 states and 3885 transitions. [2022-11-03 02:08:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 392 [2022-11-03 02:08:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:45,252 INFO L225 Difference]: With dead ends: 2652 [2022-11-03 02:08:45,253 INFO L226 Difference]: Without dead ends: 1381 [2022-11-03 02:08:45,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:45,261 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 1 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:45,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1711 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:08:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-11-03 02:08:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1373. [2022-11-03 02:08:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 877 states have (on average 1.362599771949829) internal successors, (1195), 909 states have internal predecessors, (1195), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-03 02:08:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2007 transitions. [2022-11-03 02:08:45,328 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2007 transitions. Word has length 392 [2022-11-03 02:08:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:45,329 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2007 transitions. [2022-11-03 02:08:45,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 02:08:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2007 transitions. [2022-11-03 02:08:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-03 02:08:45,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:45,338 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:45,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:08:45,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1524522285, now seen corresponding path program 1 times [2022-11-03 02:08:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:45,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931754325] [2022-11-03 02:08:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2022-11-03 02:08:46,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931754325] [2022-11-03 02:08:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931754325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086746509] [2022-11-03 02:08:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:46,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:46,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:46,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:46,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff944b9-5a4c-479a-b076-5abfaab087bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:08:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 10020 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:08:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 164 proven. 1 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2022-11-03 02:08:49,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2022-11-03 02:08:49,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086746509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:49,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90813118] [2022-11-03 02:08:49,922 INFO L159 IcfgInterpreter]: Started Sifa with 184 locations of interest [2022-11-03 02:08:49,922 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:08:49,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:08:49,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:08:49,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:09:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:49,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:50,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:51,813 INFO L244 Elim1Store]: Index analysis took 7672 ms