./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/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_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:54:46,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:54:46,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:54:46,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:54:46,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:54:46,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:54:46,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:54:46,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:54:46,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:54:46,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:54:46,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:54:46,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:54:46,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:54:46,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:54:46,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:54:46,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:54:46,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:54:46,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:54:46,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:54:46,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:54:46,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:54:46,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:54:46,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:54:46,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:54:46,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:54:46,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:54:46,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:54:46,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:54:46,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:54:46,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:54:46,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:54:46,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:54:46,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:54:46,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:54:46,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:54:46,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:54:46,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:54:46,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:54:46,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:54:46,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:54:46,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:54:46,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:54:46,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:54:46,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:54:46,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:54:46,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:54:46,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:54:46,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:54:46,187 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:54:46,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:54:46,188 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:54:46,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:54:46,189 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:54:46,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:54:46,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:54:46,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:54:46,189 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:54:46,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:54:46,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:54:46,190 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:54:46,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:54:46,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:54:46,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:54:46,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:54:46,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:54:46,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:54:46,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:54:46,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:54:46,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:54:46,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:54:46,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:54:46,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:46,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:54:46,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:54:46,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:54:46,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:54:46,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:54:46,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:54:46,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:54:46,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:54:46,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2022-11-23 15:54:46,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:54:46,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:54:46,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:54:46,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:54:46,524 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:54:46,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-23 15:54:49,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:54:50,323 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:54:50,326 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-23 15:54:50,373 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/data/72429bc63/aec3eaba2dde43c0993c7cd02abee011/FLAG12603164d [2022-11-23 15:54:50,394 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/data/72429bc63/aec3eaba2dde43c0993c7cd02abee011 [2022-11-23 15:54:50,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:54:50,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:54:50,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:50,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:54:50,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:54:50,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:50" (1/1) ... [2022-11-23 15:54:50,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e25a0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:50, skipping insertion in model container [2022-11-23 15:54:50,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:50" (1/1) ... [2022-11-23 15:54:50,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:54:50,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:54:51,763 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2022-11-23 15:54:51,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:52,018 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:54:52,311 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2022-11-23 15:54:52,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:52,436 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:54:52,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52 WrapperNode [2022-11-23 15:54:52,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:52,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:52,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:54:52,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:54:52,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:52,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:52,775 INFO L138 Inliner]: procedures = 106, calls = 3465, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 4297 [2022-11-23 15:54:52,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:52,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:54:52,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:54:52,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:54:52,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:52,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:52,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:52,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:54:53,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:54:53,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:54:53,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:54:53,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (1/1) ... [2022-11-23 15:54:53,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:53,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:54:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:54:53,245 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2022-11-23 15:54:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2022-11-23 15:54:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2022-11-23 15:54:53,246 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2022-11-23 15:54:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:54:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-23 15:54:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-23 15:54:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2022-11-23 15:54:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2022-11-23 15:54:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:54:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:54:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2022-11-23 15:54:53,248 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2022-11-23 15:54:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:54:53,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:54:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:54:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:54:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:54:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2022-11-23 15:54:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2022-11-23 15:54:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:54:53,250 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:54:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:54:53,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:54:53,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2022-11-23 15:54:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2022-11-23 15:54:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 15:54:53,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 15:54:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2022-11-23 15:54:53,253 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2022-11-23 15:54:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:54:53,253 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:54:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2022-11-23 15:54:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2022-11-23 15:54:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2022-11-23 15:54:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2022-11-23 15:54:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:54:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2022-11-23 15:54:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2022-11-23 15:54:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2022-11-23 15:54:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2022-11-23 15:54:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:54:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:54:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 15:54:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 15:54:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:54:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:54:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:54:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2022-11-23 15:54:53,258 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2022-11-23 15:54:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 15:54:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 15:54:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:54:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2022-11-23 15:54:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2022-11-23 15:54:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2022-11-23 15:54:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2022-11-23 15:54:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 15:54:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 15:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:54:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:54:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2022-11-23 15:54:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2022-11-23 15:54:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2022-11-23 15:54:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2022-11-23 15:54:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2022-11-23 15:54:53,263 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2022-11-23 15:54:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2022-11-23 15:54:53,263 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2022-11-23 15:54:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:54:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:54:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 15:54:53,265 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 15:54:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2022-11-23 15:54:53,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2022-11-23 15:54:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2022-11-23 15:54:53,266 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2022-11-23 15:54:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 15:54:53,266 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 15:54:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-23 15:54:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-23 15:54:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2022-11-23 15:54:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2022-11-23 15:54:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:54:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2022-11-23 15:54:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2022-11-23 15:54:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-23 15:54:53,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-23 15:54:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:54:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:54:53,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:54:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2022-11-23 15:54:53,271 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2022-11-23 15:54:53,735 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:54:53,738 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:54:54,660 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:55:00,887 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:55:01,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:55:01,847 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:55:01,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:01 BoogieIcfgContainer [2022-11-23 15:55:01,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:55:01,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:55:01,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:55:01,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:55:01,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:50" (1/3) ... [2022-11-23 15:55:01,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5b11d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:01, skipping insertion in model container [2022-11-23 15:55:01,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:52" (2/3) ... [2022-11-23 15:55:01,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5b11d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:01, skipping insertion in model container [2022-11-23 15:55:01,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:01" (3/3) ... [2022-11-23 15:55:01,861 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-23 15:55:01,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:55:01,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:55:01,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:55:01,969 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54e6b9e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:55:01,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:55:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) [2022-11-23 15:55:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-23 15:55:02,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:02,006 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:02,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1984860205, now seen corresponding path program 1 times [2022-11-23 15:55:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334335190] [2022-11-23 15:55:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-23 15:55:04,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:04,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334335190] [2022-11-23 15:55:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334335190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:04,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:04,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:04,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498211072] [2022-11-23 15:55:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:04,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:04,684 INFO L87 Difference]: Start difference. First operand has 662 states, 417 states have (on average 1.3860911270983214) internal successors, (578), 433 states have internal predecessors, (578), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:06,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:08,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:09,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:11,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:12,686 INFO L93 Difference]: Finished difference Result 1352 states and 2027 transitions. [2022-11-23 15:55:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:12,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 262 [2022-11-23 15:55:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:12,712 INFO L225 Difference]: With dead ends: 1352 [2022-11-23 15:55:12,712 INFO L226 Difference]: Without dead ends: 757 [2022-11-23 15:55:12,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:12,728 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 178 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1754 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-23 15:55:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-23 15:55:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2022-11-23 15:55:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 466 states have (on average 1.3690987124463518) internal successors, (638), 484 states have internal predecessors, (638), 231 states have call successors, (231), 47 states have call predecessors, (231), 47 states have return successors, (231), 225 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-23 15:55:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1100 transitions. [2022-11-23 15:55:12,907 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1100 transitions. Word has length 262 [2022-11-23 15:55:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:12,914 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1100 transitions. [2022-11-23 15:55:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1100 transitions. [2022-11-23 15:55:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-23 15:55:12,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:12,936 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:12,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:55:12,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2035801806, now seen corresponding path program 1 times [2022-11-23 15:55:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585609655] [2022-11-23 15:55:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:12,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-23 15:55:14,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585609655] [2022-11-23 15:55:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585609655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:14,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290330617] [2022-11-23 15:55:14,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:14,972 INFO L87 Difference]: Start difference. First operand 745 states and 1100 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-23 15:55:16,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:18,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:19,462 INFO L93 Difference]: Finished difference Result 2022 states and 2991 transitions. [2022-11-23 15:55:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 273 [2022-11-23 15:55:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:19,475 INFO L225 Difference]: With dead ends: 2022 [2022-11-23 15:55:19,475 INFO L226 Difference]: Without dead ends: 1375 [2022-11-23 15:55:19,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:19,480 INFO L413 NwaCegarLoop]: 1075 mSDtfsCounter, 833 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:19,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1805 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 15:55:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-23 15:55:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1373. [2022-11-23 15:55:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.386651323360184) internal successors, (1205), 905 states have internal predecessors, (1205), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2022-11-23 15:55:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2029 transitions. [2022-11-23 15:55:19,567 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2029 transitions. Word has length 273 [2022-11-23 15:55:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:19,569 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2029 transitions. [2022-11-23 15:55:19,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-23 15:55:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2029 transitions. [2022-11-23 15:55:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-23 15:55:19,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:19,575 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:55:19,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1485941966, now seen corresponding path program 1 times [2022-11-23 15:55:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841699937] [2022-11-23 15:55:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-23 15:55:21,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841699937] [2022-11-23 15:55:21,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841699937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:21,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:21,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:55:21,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079845658] [2022-11-23 15:55:21,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:21,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:55:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:55:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:55:21,154 INFO L87 Difference]: Start difference. First operand 1373 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:23,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:25,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:27,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:28,394 INFO L93 Difference]: Finished difference Result 2652 states and 3921 transitions. [2022-11-23 15:55:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:55:28,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 275 [2022-11-23 15:55:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:28,405 INFO L225 Difference]: With dead ends: 2652 [2022-11-23 15:55:28,406 INFO L226 Difference]: Without dead ends: 1373 [2022-11-23 15:55:28,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:55:28,414 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 1 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:28,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2603 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-23 15:55:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-11-23 15:55:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1373. [2022-11-23 15:55:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 869 states have (on average 1.384349827387802) internal successors, (1203), 905 states have internal predecessors, (1203), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2022-11-23 15:55:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2027 transitions. [2022-11-23 15:55:28,494 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2027 transitions. Word has length 275 [2022-11-23 15:55:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:28,495 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2027 transitions. [2022-11-23 15:55:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:28,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2027 transitions. [2022-11-23 15:55:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-23 15:55:28,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:28,502 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:55:28,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -124817645, now seen corresponding path program 1 times [2022-11-23 15:55:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997239932] [2022-11-23 15:55:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:28,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-23 15:55:30,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997239932] [2022-11-23 15:55:30,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997239932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:30,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:30,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:55:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694740217] [2022-11-23 15:55:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:55:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:55:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:55:30,285 INFO L87 Difference]: Start difference. First operand 1373 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:32,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:34,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:35,133 INFO L93 Difference]: Finished difference Result 2652 states and 3917 transitions. [2022-11-23 15:55:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:55:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 278 [2022-11-23 15:55:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:35,143 INFO L225 Difference]: With dead ends: 2652 [2022-11-23 15:55:35,143 INFO L226 Difference]: Without dead ends: 1361 [2022-11-23 15:55:35,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:55:35,151 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 1 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2594 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 15:55:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-11-23 15:55:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1361. [2022-11-23 15:55:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 865 states have (on average 1.3676300578034681) internal successors, (1183), 897 states have internal predecessors, (1183), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-23 15:55:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1995 transitions. [2022-11-23 15:55:35,218 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1995 transitions. Word has length 278 [2022-11-23 15:55:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:35,219 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1995 transitions. [2022-11-23 15:55:35,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2022-11-23 15:55:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1995 transitions. [2022-11-23 15:55:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-23 15:55:35,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:35,226 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:55:35,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1541642054, now seen corresponding path program 1 times [2022-11-23 15:55:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:35,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454944895] [2022-11-23 15:55:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2022-11-23 15:55:36,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454944895] [2022-11-23 15:55:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454944895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027658658] [2022-11-23 15:55:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:36,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:36,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:55:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 9946 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:55:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2383 trivial. 0 not checked. [2022-11-23 15:55:39,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:55:39,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027658658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:39,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:55:39,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-23 15:55:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610510268] [2022-11-23 15:55:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:55:39,406 INFO L87 Difference]: Start difference. First operand 1361 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-23 15:55:41,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:43,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:44,085 INFO L93 Difference]: Finished difference Result 2648 states and 4067 transitions. [2022-11-23 15:55:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 382 [2022-11-23 15:55:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:44,097 INFO L225 Difference]: With dead ends: 2648 [2022-11-23 15:55:44,098 INFO L226 Difference]: Without dead ends: 1385 [2022-11-23 15:55:44,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:55:44,108 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 2 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:44,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1707 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 15:55:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-23 15:55:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1369. [2022-11-23 15:55:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 873 states have (on average 1.3642611683848798) internal successors, (1191), 905 states have internal predecessors, (1191), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-23 15:55:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2003 transitions. [2022-11-23 15:55:44,185 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2003 transitions. Word has length 382 [2022-11-23 15:55:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:44,186 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2003 transitions. [2022-11-23 15:55:44,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-23 15:55:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2003 transitions. [2022-11-23 15:55:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-23 15:55:44,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:44,196 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:44,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:55:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:44,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:44,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1857863080, now seen corresponding path program 1 times [2022-11-23 15:55:44,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:44,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137416723] [2022-11-23 15:55:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2467 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2022-11-23 15:55:46,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137416723] [2022-11-23 15:55:46,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137416723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:46,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:46,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845998750] [2022-11-23 15:55:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:46,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:46,072 INFO L87 Difference]: Start difference. First operand 1369 states and 2003 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-23 15:55:48,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:50,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:50,734 INFO L93 Difference]: Finished difference Result 2652 states and 3885 transitions. [2022-11-23 15:55:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 392 [2022-11-23 15:55:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:50,748 INFO L225 Difference]: With dead ends: 2652 [2022-11-23 15:55:50,748 INFO L226 Difference]: Without dead ends: 1381 [2022-11-23 15:55:50,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:50,758 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 1 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:50,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1711 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 15:55:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-11-23 15:55:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1373. [2022-11-23 15:55:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 877 states have (on average 1.362599771949829) internal successors, (1195), 909 states have internal predecessors, (1195), 406 states have call successors, (406), 89 states have call predecessors, (406), 89 states have return successors, (406), 396 states have call predecessors, (406), 406 states have call successors, (406) [2022-11-23 15:55:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2007 transitions. [2022-11-23 15:55:50,840 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2007 transitions. Word has length 392 [2022-11-23 15:55:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:50,842 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 2007 transitions. [2022-11-23 15:55:50,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-23 15:55:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2007 transitions. [2022-11-23 15:55:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-23 15:55:50,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:50,854 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:55:50,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash 283745220, now seen corresponding path program 1 times [2022-11-23 15:55:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659959055] [2022-11-23 15:55:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2022-11-23 15:55:52,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659959055] [2022-11-23 15:55:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659959055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:55:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231633358] [2022-11-23 15:55:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:55:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:52,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:55:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d88d452-5d0e-4159-b242-09664e22e1b8/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:55:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:55,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 10022 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:55:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:55:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 164 proven. 1 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2022-11-23 15:55:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:55:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2577 trivial. 0 not checked. [2022-11-23 15:55:55,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231633358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:55:55,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799898074] [2022-11-23 15:55:55,941 INFO L159 IcfgInterpreter]: Started Sifa with 184 locations of interest [2022-11-23 15:55:55,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:55:55,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:55:55,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:55:55,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:56:51,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:55,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:55,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:55,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:56,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:56,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:56:59,551 INFO L217 Elim1Store]: Index analysis took 8456 ms