./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/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_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:52:30,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:52:30,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:52:30,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:52:30,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:52:30,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:52:30,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:52:30,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:52:30,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:52:30,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:52:30,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:52:30,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:52:30,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:52:30,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:52:30,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:52:30,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:52:30,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:52:30,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:52:30,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:52:30,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:52:30,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:52:30,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:52:30,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:52:30,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:52:30,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:52:30,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:52:30,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:52:30,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:52:30,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:52:30,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:52:30,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:52:30,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:52:30,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:52:30,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:52:30,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:52:30,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:52:30,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:52:30,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:52:30,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:52:30,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:52:30,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:52:30,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:52:30,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:52:30,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:52:30,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:52:30,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:52:30,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:52:30,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:52:30,978 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:52:30,978 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:52:30,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:52:30,979 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:52:30,979 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:52:30,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:52:30,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:52:30,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:52:30,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:52:30,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:52:30,980 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:52:30,981 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:52:30,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:52:30,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:52:30,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:52:30,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:52:30,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:52:30,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:52:30,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:52:30,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:52:30,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:52:30,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:52:30,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:52:30,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:52:30,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:52:30,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:52:30,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:52:30,985 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:52:30,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:52:30,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:52:30,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:52:30,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:52:30,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-25 18:52:31,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:52:31,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:52:31,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:52:31,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:52:31,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:52:31,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/../../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 [2021-11-25 18:52:31,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/data/6dd81ea8f/bf8ec635b5c04bc1a7d8cadddbbb0368/FLAGd009e69e5 [2021-11-25 18:52:32,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:52:32,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/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 [2021-11-25 18:52:32,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/data/6dd81ea8f/bf8ec635b5c04bc1a7d8cadddbbb0368/FLAGd009e69e5 [2021-11-25 18:52:32,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/data/6dd81ea8f/bf8ec635b5c04bc1a7d8cadddbbb0368 [2021-11-25 18:52:32,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:52:32,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:52:32,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:52:32,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:52:32,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:52:32,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:52:32" (1/1) ... [2021-11-25 18:52:32,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bc003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:32, skipping insertion in model container [2021-11-25 18:52:32,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:52:32" (1/1) ... [2021-11-25 18:52:32,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:52:32,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:52:33,448 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_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/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] [2021-11-25 18:52:33,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:52:33,599 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:52:33,905 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_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/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] [2021-11-25 18:52:33,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:52:34,056 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:52:34,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34 WrapperNode [2021-11-25 18:52:34,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:52:34,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:52:34,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:52:34,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:52:34,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,297 INFO L137 Inliner]: procedures = 106, calls = 3465, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 4255 [2021-11-25 18:52:34,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:52:34,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:52:34,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:52:34,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:52:34,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:52:34,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:52:34,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:52:34,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:52:34,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (1/1) ... [2021-11-25 18:52:34,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:52:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:34,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:52:34,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:52:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2021-11-25 18:52:34,840 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2021-11-25 18:52:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2021-11-25 18:52:34,840 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2021-11-25 18:52:34,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:52:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-25 18:52:34,841 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-25 18:52:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2021-11-25 18:52:34,841 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2021-11-25 18:52:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:52:34,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:52:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2021-11-25 18:52:34,842 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2021-11-25 18:52:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:52:34,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:52:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:52:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:52:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:52:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2021-11-25 18:52:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2021-11-25 18:52:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:52:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:52:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:52:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:52:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2021-11-25 18:52:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2021-11-25 18:52:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-25 18:52:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-25 18:52:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2021-11-25 18:52:34,845 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2021-11-25 18:52:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:52:34,845 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:52:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2021-11-25 18:52:34,846 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2021-11-25 18:52:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2021-11-25 18:52:34,846 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2021-11-25 18:52:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:52:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2021-11-25 18:52:34,846 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2021-11-25 18:52:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2021-11-25 18:52:34,847 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2021-11-25 18:52:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:52:34,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:52:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 18:52:34,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 18:52:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:52:34,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:52:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:52:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2021-11-25 18:52:34,849 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2021-11-25 18:52:34,850 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 18:52:34,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 18:52:34,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:52:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2021-11-25 18:52:34,852 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2021-11-25 18:52:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2021-11-25 18:52:34,852 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2021-11-25 18:52:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 18:52:34,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 18:52:34,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:52:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:52:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:52:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2021-11-25 18:52:34,853 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2021-11-25 18:52:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2021-11-25 18:52:34,853 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2021-11-25 18:52:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2021-11-25 18:52:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2021-11-25 18:52:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2021-11-25 18:52:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2021-11-25 18:52:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:52:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:52:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-25 18:52:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-25 18:52:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2021-11-25 18:52:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2021-11-25 18:52:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2021-11-25 18:52:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2021-11-25 18:52:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 18:52:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 18:52:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-25 18:52:34,856 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-25 18:52:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2021-11-25 18:52:34,857 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2021-11-25 18:52:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:52:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2021-11-25 18:52:34,858 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2021-11-25 18:52:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-25 18:52:34,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-25 18:52:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:52:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:52:34,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:52:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2021-11-25 18:52:34,860 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2021-11-25 18:52:35,336 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:52:35,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:52:35,896 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:52:41,247 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:52:41,806 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:52:41,806 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:52:41,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:52:41 BoogieIcfgContainer [2021-11-25 18:52:41,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:52:41,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:52:41,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:52:41,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:52:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:52:32" (1/3) ... [2021-11-25 18:52:41,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21136e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:52:41, skipping insertion in model container [2021-11-25 18:52:41,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:34" (2/3) ... [2021-11-25 18:52:41,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21136e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:52:41, skipping insertion in model container [2021-11-25 18:52:41,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:52:41" (3/3) ... [2021-11-25 18:52:41,828 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-25 18:52:41,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:52:41,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:52:41,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:52:41,917 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:52:41,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:52:41,971 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) [2021-11-25 18:52:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-25 18:52:41,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:41,994 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:52:41,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:52:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391153, now seen corresponding path program 1 times [2021-11-25 18:52:42,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205331894] [2021-11-25 18:52:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:42,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-25 18:52:43,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205331894] [2021-11-25 18:52:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205331894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:52:43,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:52:43,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:52:43,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506270600] [2021-11-25 18:52:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:52:43,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:52:43,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:52:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:52:43,654 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) [2021-11-25 18:52:45,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:52:47,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:52:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:48,677 INFO L93 Difference]: Finished difference Result 1352 states and 2027 transitions. [2021-11-25 18:52:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:52:48,680 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 [2021-11-25 18:52:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:48,703 INFO L225 Difference]: With dead ends: 1352 [2021-11-25 18:52:48,703 INFO L226 Difference]: Without dead ends: 757 [2021-11-25 18:52:48,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:52:48,723 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 178 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:48,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1755 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 18:52:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-25 18:52:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2021-11-25 18:52:48,842 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) [2021-11-25 18:52:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1100 transitions. [2021-11-25 18:52:48,854 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1100 transitions. Word has length 262 [2021-11-25 18:52:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:48,856 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1100 transitions. [2021-11-25 18:52:48,857 INFO L471 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) [2021-11-25 18:52:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1100 transitions. [2021-11-25 18:52:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-25 18:52:48,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:48,866 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:52:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:52:48,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:52:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash -426608264, now seen corresponding path program 1 times [2021-11-25 18:52:48,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:48,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537154561] [2021-11-25 18:52:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:48,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-25 18:52:50,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:50,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537154561] [2021-11-25 18:52:50,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537154561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:52:50,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:52:50,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:52:50,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100612528] [2021-11-25 18:52:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:52:50,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:52:50,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:52:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:52:50,070 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) [2021-11-25 18:52:52,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:52:54,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:52:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:54,888 INFO L93 Difference]: Finished difference Result 2022 states and 2991 transitions. [2021-11-25 18:52:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:52:54,889 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 [2021-11-25 18:52:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:54,913 INFO L225 Difference]: With dead ends: 2022 [2021-11-25 18:52:54,913 INFO L226 Difference]: Without dead ends: 1375 [2021-11-25 18:52:54,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:52:54,923 INFO L933 BasicCegarLoop]: 1075 mSDtfsCounter, 833 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:54,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 1805 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 18:52:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-11-25 18:52:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1373. [2021-11-25 18:52:55,046 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) [2021-11-25 18:52:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2029 transitions. [2021-11-25 18:52:55,064 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2029 transitions. Word has length 273 [2021-11-25 18:52:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:55,066 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2029 transitions. [2021-11-25 18:52:55,067 INFO L471 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) [2021-11-25 18:52:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2029 transitions. [2021-11-25 18:52:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-25 18:52:55,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:55,076 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:52:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:52:55,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:52:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1520780228, now seen corresponding path program 1 times [2021-11-25 18:52:55,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:55,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982152440] [2021-11-25 18:52:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:55,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-25 18:52:55,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982152440] [2021-11-25 18:52:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982152440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:52:55,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:52:55,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:52:55,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495704986] [2021-11-25 18:52:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:52:55,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:52:55,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:52:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:52:55,848 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) [2021-11-25 18:52:57,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:00,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:00,616 INFO L93 Difference]: Finished difference Result 2652 states and 3921 transitions. [2021-11-25 18:53:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:53:00,617 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 [2021-11-25 18:53:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:00,630 INFO L225 Difference]: With dead ends: 2652 [2021-11-25 18:53:00,631 INFO L226 Difference]: Without dead ends: 1373 [2021-11-25 18:53:00,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:53:00,640 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 1 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:00,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2603 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 18:53:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-11-25 18:53:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1373. [2021-11-25 18:53:00,714 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) [2021-11-25 18:53:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2027 transitions. [2021-11-25 18:53:00,728 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2027 transitions. Word has length 275 [2021-11-25 18:53:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:00,729 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2027 transitions. [2021-11-25 18:53:00,729 INFO L471 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) [2021-11-25 18:53:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2027 transitions. [2021-11-25 18:53:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-25 18:53:00,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:00,735 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:53:00,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:53:00,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash 56011632, now seen corresponding path program 1 times [2021-11-25 18:53:00,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142198284] [2021-11-25 18:53:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:00,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-25 18:53:01,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:01,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142198284] [2021-11-25 18:53:01,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142198284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:01,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:01,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:53:01,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606730915] [2021-11-25 18:53:01,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:01,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:53:01,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:53:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:53:01,475 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) [2021-11-25 18:53:02,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:05,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:05,749 INFO L93 Difference]: Finished difference Result 2652 states and 3917 transitions. [2021-11-25 18:53:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:53:05,750 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 [2021-11-25 18:53:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:05,762 INFO L225 Difference]: With dead ends: 2652 [2021-11-25 18:53:05,762 INFO L226 Difference]: Without dead ends: 1361 [2021-11-25 18:53:05,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:53:05,772 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 1 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:05,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 2594 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 18:53:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-25 18:53:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1361. [2021-11-25 18:53:05,842 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) [2021-11-25 18:53:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1995 transitions. [2021-11-25 18:53:05,854 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1995 transitions. Word has length 278 [2021-11-25 18:53:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:05,858 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1995 transitions. [2021-11-25 18:53:05,858 INFO L471 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) [2021-11-25 18:53:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1995 transitions. [2021-11-25 18:53:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-25 18:53:05,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:05,869 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:53:05,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:53:05,869 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1633255471, now seen corresponding path program 1 times [2021-11-25 18:53:05,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:05,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430159289] [2021-11-25 18:53:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:05,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2388 trivial. 0 not checked. [2021-11-25 18:53:06,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430159289] [2021-11-25 18:53:06,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430159289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881189585] [2021-11-25 18:53:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:06,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:06,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:06,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:53:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 9935 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:53:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2021-11-25 18:53:09,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881189585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:09,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:53:09,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-25 18:53:09,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015587003] [2021-11-25 18:53:09,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:09,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:09,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:09,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:53:09,342 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) [2021-11-25 18:53:11,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:13,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:13,918 INFO L93 Difference]: Finished difference Result 2648 states and 4067 transitions. [2021-11-25 18:53:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:13,919 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 [2021-11-25 18:53:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:13,933 INFO L225 Difference]: With dead ends: 2648 [2021-11-25 18:53:13,934 INFO L226 Difference]: Without dead ends: 1385 [2021-11-25 18:53:13,947 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:13,948 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 2 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:13,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1707 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 182 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 18:53:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-25 18:53:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1369. [2021-11-25 18:53:14,032 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) [2021-11-25 18:53:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2003 transitions. [2021-11-25 18:53:14,050 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2003 transitions. Word has length 376 [2021-11-25 18:53:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:14,052 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2003 transitions. [2021-11-25 18:53:14,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-11-25 18:53:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2003 transitions. [2021-11-25 18:53:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-25 18:53:14,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:14,062 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:53:14,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:53:14,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:14,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1489186375, now seen corresponding path program 1 times [2021-11-25 18:53:14,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:14,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040410064] [2021-11-25 18:53:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:14,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2467 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2021-11-25 18:53:15,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040410064] [2021-11-25 18:53:15,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040410064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:15,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:15,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:15,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410438499] [2021-11-25 18:53:15,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:15,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:15,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:15,071 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) [2021-11-25 18:53:17,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:19,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:19,685 INFO L93 Difference]: Finished difference Result 2652 states and 3885 transitions. [2021-11-25 18:53:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:19,686 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 [2021-11-25 18:53:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:19,700 INFO L225 Difference]: With dead ends: 2652 [2021-11-25 18:53:19,700 INFO L226 Difference]: Without dead ends: 1381 [2021-11-25 18:53:19,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:19,708 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 1 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:19,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1712 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 18:53:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-11-25 18:53:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1373. [2021-11-25 18:53:19,776 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) [2021-11-25 18:53:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2007 transitions. [2021-11-25 18:53:19,784 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2007 transitions. Word has length 392 [2021-11-25 18:53:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:19,785 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2007 transitions. [2021-11-25 18:53:19,786 INFO L471 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) [2021-11-25 18:53:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2007 transitions. [2021-11-25 18:53:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-25 18:53:19,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:19,796 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:53:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:53:19,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1524522285, now seen corresponding path program 1 times [2021-11-25 18:53:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131890872] [2021-11-25 18:53:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:19,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2021-11-25 18:53:20,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131890872] [2021-11-25 18:53:20,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131890872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012985533] [2021-11-25 18:53:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:20,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:20,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:20,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3ec5af-37c1-43f0-9f96-4d8b18de18aa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:53:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 10020 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:53:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 164 proven. 1 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-11-25 18:53:23,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2021-11-25 18:53:24,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012985533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700855748] [2021-11-25 18:53:24,100 INFO L159 IcfgInterpreter]: Started Sifa with 184 locations of interest [2021-11-25 18:53:24,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:24,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:24,111 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:24,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:59,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:03,067 INFO L244 Elim1Store]: Index analysis took 4700 ms